32's on an unlifted TJ for a while?
06-10-2004, 02:56 PM
#31
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
I'm gonna chime in with Bob here. If the objective is to get back to
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
06-10-2004, 02:56 PM
#32
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
I'm gonna chime in with Bob here. If the objective is to get back to
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
06-10-2004, 02:56 PM
#33
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
I'm gonna chime in with Bob here. If the objective is to get back to
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
stock gearing for a daily driver, for example in the case of 215/75R15
(27.7") on 3.07 ratio, here's what ratios you would need:
31" (30.8"): 3.41 (3.55)
32" (31.8"): 3.52 (3.55)
33" (32.8"): 3.64 (3.73)
35" (34.8"): 3.86 (4.10)
Granted, bigger tires and steel wheels will add rolling resistance, wind
resistance, unsprung weight, etc. so simply matching stock gearing will
yield a relative drop in power. Going up to the next gear size to
compensate gives the following conventional recommendation:
31": 3.73
32": 3.73
33": 4.10
35": 4.56
If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
spares, tools, etc. then next ratio may be desired. If you primarily
rally in high range on dirt, one or two up would help. For low range
crawling ability on a daily driver, the ideal solution is to gear
slightly hotter than stock and upgrade to a 4:1 transfer case.
Steve
Bob wrote:
> Brian,
>
> I just want to take issue with you on the gearing/tire combos.
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
>>Regearing to 4.10 is more conducive to 31's... from my reading I've
>>concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10 will
>>suck... depends mostly on your driving style and usage.
06-10-2004, 04:27 PM
#34
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Hi Bob,
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
06-10-2004, 04:27 PM
#35
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Hi Bob,
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
06-10-2004, 04:27 PM
#36
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Hi Bob,
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
06-10-2004, 04:27 PM
#37
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Hi Bob,
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
Personal preference and intended use is obviously the deciding factor. My
experience is mostly with auto-XJ's as well and that would probably account
for the difference our opinions.
My 4.0HO(fresh)/AW4/3.55 on new 31's seems a little sluggish now compared to
stock form and while I have yet to get offroad, I know in advance my crawl
ratio is going to suffer with the 2.72 t-case.
Having driven a friends auto-XJ with 31's and 4.56, I quite enjoyed it
on/off road but I would tend to think that would be overkill for most users.
He's since installed 33's... says it's liveable but misses the crawl ratio.
Two things I know we can agree on:
1. there is no absolute standard for gearing - everybody needs are
different.
2. wouldn't it be nice if retailers/installers had a free trial period?
-Brian
"Bob" <magicclaw@mac.com> wrote in message
news:47b769ae.0406100954.2b19dcf5@posting.google.c om...
: Brian,
:
: I just want to take issue with you on the gearing/tire combos.
: I think you're being a little more aggressive than necessary. My own
: reading into this and figuring ratios and such actually puts 4.56 w/a
: 33" tire on the aggressive side as it is. My own experience backs this
: up.
: I still have the stock speedo gear, so my speedo reflects what a stock
: gear ratio with stock tires would reflect at a given speed.
: I have had 33s for some time now. Originally with the stock 3.55
: gears; my speed was of by a bit, reading 60MPH when I was going
: approx. 70MPH.
: Now, I have 4.56 gears with my 33s. When my speedo reads 80MPH, I'm
: actually going approx. 70MPH. I've flipflopped from undergeared to
: slightly overgeared as compared to stock diff gearing to tire size
: ratios. So, I think it is safe to say I went beyond the optimal
: street/off-road combo gearing, going further toward better off-road
: performance, by getting the 4.56 gears with my 33" tires.
: Therefore, I would say:
:
: 4.10 gears for 31" or 32" tires is perfectly fine; a little better
: than stock (except when compared to a stock rubicon with 31" tires).
: 4.56 gears for 33" tires (4.10 would still work ok for 33s, but i
: prefer a slightly improved crawl ratio at the expense of highway
: top-speed).
: 4.88 for 35" minimum tire size. 4.88 would probably work well with 37"
: tires, too, but by the time you hit 37" tires, you probably don't
: daily-drive the rig anymore anyway, so I'd probably gear higher for
: better crawl ratios.
:
: Of course if you don't care if your top street speed would be 55MPH,
: then by all means, get 4.88 gears for 33" tires.
: It's just that, with my 4.56 gears, my engine is revving at 3000 RPMs
: when I'm going only 75MPH or so.
:
: Just my take on it.
:
: /Bob
:
: "Cherokee-LTD" <spammenot@home.com> wrote in message
news:<nQAxc.68323$bVw1.66846@news01.bloor.is.net.c able.rogers.com>...
: > "Handywired" <handywired@aol.com> wrote in message
: > news:20040609044813.15320.00000594@mb-m26.aol.com...
:
: <snip>
:
: > Regearing to 4.10 is more conducive to 31's... from my reading I've
: > concluded 4.10=31", 4.56=32", 4.88=33". That's not to say 32's on 4.10
will
: > suck... depends mostly on your driving style and usage.
:
: <snip>
06-10-2004, 04:41 PM
#38
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Real Jeeps use 5.38s: http://www.oly4x4.com/gearratios.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve
06-10-2004, 04:41 PM
#39
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Real Jeeps use 5.38s: http://www.oly4x4.com/gearratios.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve
06-10-2004, 04:41 PM
#40
Guest
Posts: n/a
Re: 32's on an unlifted TJ for a while?
Real Jeeps use 5.38s: http://www.oly4x4.com/gearratios.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Steve wrote:
>
> I'm gonna chime in with Bob here. If the objective is to get back to
> stock gearing for a daily driver, for example in the case of 215/75R15
> (27.7") on 3.07 ratio, here's what ratios you would need:
>
> 31" (30.8"): 3.41 (3.55)
> 32" (31.8"): 3.52 (3.55)
> 33" (32.8"): 3.64 (3.73)
> 35" (34.8"): 3.86 (4.10)
>
> Granted, bigger tires and steel wheels will add rolling resistance, wind
> resistance, unsprung weight, etc. so simply matching stock gearing will
> yield a relative drop in power. Going up to the next gear size to
> compensate gives the following conventional recommendation:
>
> 31": 3.73
> 32": 3.73
> 33": 4.10
> 35": 4.56
>
> If you're hauling heavy bumpers, skids, rack, winch, welder, hilift,
> spares, tools, etc. then next ratio may be desired. If you primarily
> rally in high range on dirt, one or two up would help. For low range
> crawling ability on a daily driver, the ideal solution is to gear
> slightly hotter than stock and upgrade to a 4:1 transfer case.
>
> Steve