Stinking o-rings and speedo gears
 

Ok, two problems today:

1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
website (linked to by multiple other sites) said I needed. Finally get it
installed and working, and it's 10% off. Not much of a problem at low
speeds, but it adds up at highway speeds. Also, it's off in the OTHER
direction -- says I'm going much faster than I am. Also means more miles...

2. When installed the new gear, I apparently ripped the little o-ring apart
that seals the assembly in the transfer case. SO, I have fluid going
everywhere whenever I drive. AND, none of the parts stores carry that size
of ring. They said it's a dealer-only. I hope they sell them seperately...

So, I have a useless speedo gear and an out-of-commission vehicle until
Monday, at the earliest. Fan-freakin-tastic.

Anyone know of a better place other than
http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
what gear I need??

Thanks,

Eric
99 TJ SE
4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
wounds.

Re: Stinking o-rings and speedo gears
 

http://go.jeep-xj.info/HowtoSpeedoGears.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.

Re: Stinking o-rings and speedo gears
 

http://go.jeep-xj.info/HowtoSpeedoGears.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.

Re: Stinking o-rings and speedo gears
 

http://go.jeep-xj.info/HowtoSpeedoGears.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.

Re: Stinking o-rings and speedo gears
 

I just found that site. See, that's one of many that says I need a 36 tooth
gear (which, if the 3% per tooth theory is true, that would make sense). I
found another that says I need a 34...\

I now have a 33 tooth gear that I can't do anything with. I'm sure the
stealership won't take it back (although it only has a few miles on it...).
I hate to buy another gear just for it to be wrong...

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B3AC5.E975F217@cox.net...
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> Ok, two problems today:
>>
>> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
>> a
>> website (linked to by multiple other sites) said I needed. Finally get it
>> installed and working, and it's 10% off. Not much of a problem at low
>> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
>> direction -- says I'm going much faster than I am. Also means more
>> miles...
>>
>> 2. When installed the new gear, I apparently ripped the little o-ring
>> apart
>> that seals the assembly in the transfer case. SO, I have fluid going
>> everywhere whenever I drive. AND, none of the parts stores carry that
>> size
>> of ring. They said it's a dealer-only. I hope they sell them
>> seperately...
>>
>> So, I have a useless speedo gear and an out-of-commission vehicle until
>> Monday, at the earliest. Fan-freakin-tastic.
>>
>> Anyone know of a better place other than
>> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to
>> check
>> what gear I need??
>>
>> Thanks,
>>
>> Eric
>> 99 TJ SE
>> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
>> Challenger
>> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
>> wounds.

Re: Stinking o-rings and speedo gears
 

I just found that site. See, that's one of many that says I need a 36 tooth
gear (which, if the 3% per tooth theory is true, that would make sense). I
found another that says I need a 34...\

I now have a 33 tooth gear that I can't do anything with. I'm sure the
stealership won't take it back (although it only has a few miles on it...).
I hate to buy another gear just for it to be wrong...

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B3AC5.E975F217@cox.net...
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> Ok, two problems today:
>>
>> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
>> a
>> website (linked to by multiple other sites) said I needed. Finally get it
>> installed and working, and it's 10% off. Not much of a problem at low
>> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
>> direction -- says I'm going much faster than I am. Also means more
>> miles...
>>
>> 2. When installed the new gear, I apparently ripped the little o-ring
>> apart
>> that seals the assembly in the transfer case. SO, I have fluid going
>> everywhere whenever I drive. AND, none of the parts stores carry that
>> size
>> of ring. They said it's a dealer-only. I hope they sell them
>> seperately...
>>
>> So, I have a useless speedo gear and an out-of-commission vehicle until
>> Monday, at the earliest. Fan-freakin-tastic.
>>
>> Anyone know of a better place other than
>> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to
>> check
>> what gear I need??
>>
>> Thanks,
>>
>> Eric
>> 99 TJ SE
>> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
>> Challenger
>> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
>> wounds.

Re: Stinking o-rings and speedo gears
 

I just found that site. See, that's one of many that says I need a 36 tooth
gear (which, if the 3% per tooth theory is true, that would make sense). I
found another that says I need a 34...\

I now have a 33 tooth gear that I can't do anything with. I'm sure the
stealership won't take it back (although it only has a few miles on it...).
I hate to buy another gear just for it to be wrong...

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B3AC5.E975F217@cox.net...
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> Ok, two problems today:
>>
>> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
>> a
>> website (linked to by multiple other sites) said I needed. Finally get it
>> installed and working, and it's 10% off. Not much of a problem at low
>> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
>> direction -- says I'm going much faster than I am. Also means more
>> miles...
>>
>> 2. When installed the new gear, I apparently ripped the little o-ring
>> apart
>> that seals the assembly in the transfer case. SO, I have fluid going
>> everywhere whenever I drive. AND, none of the parts stores carry that
>> size
>> of ring. They said it's a dealer-only. I hope they sell them
>> seperately...
>>
>> So, I have a useless speedo gear and an out-of-commission vehicle until
>> Monday, at the earliest. Fan-freakin-tastic.
>>
>> Anyone know of a better place other than
>> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to
>> check
>> what gear I need??
>>
>> Thanks,
>>
>> Eric
>> 99 TJ SE
>> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
>> Challenger
>> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
>> wounds.

Re: Stinking o-rings and speedo gears
 

And another for your 33:
http://www.jeeptech.com/javaAps/Speedo.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> I just found that site. See, that's one of many that says I need a 36 tooth
> gear (which, if the 3% per tooth theory is true, that would make sense). I
> found another that says I need a 34...\
>
> I now have a 33 tooth gear that I can't do anything with. I'm sure the
> stealership won't take it back (although it only has a few miles on it...).
> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

And another for your 33:
http://www.jeeptech.com/javaAps/Speedo.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> I just found that site. See, that's one of many that says I need a 36 tooth
> gear (which, if the 3% per tooth theory is true, that would make sense). I
> found another that says I need a 34...\
>
> I now have a 33 tooth gear that I can't do anything with. I'm sure the
> stealership won't take it back (although it only has a few miles on it...).
> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

And another for your 33:
http://www.jeeptech.com/javaAps/Speedo.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Eric wrote:
>
> I just found that site. See, that's one of many that says I need a 36 tooth
> gear (which, if the 3% per tooth theory is true, that would make sense). I
> found another that says I need a 34...\
>
> I now have a 33 tooth gear that I can't do anything with. I'm sure the
> stealership won't take it back (although it only has a few miles on it...).
> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

That's actually the site that I used. It is linked to from cowtown.

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B40E2.7316703@cox.net...
> And another for your 33:
> http://www.jeeptech.com/javaAps/Speedo.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> I just found that site. See, that's one of many that says I need a 36
>> tooth
>> gear (which, if the 3% per tooth theory is true, that would make sense).
>> I
>> found another that says I need a 34...\
>>
>> I now have a 33 tooth gear that I can't do anything with. I'm sure the
>> stealership won't take it back (although it only has a few miles on
>> it...).
>> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

That's actually the site that I used. It is linked to from cowtown.

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B40E2.7316703@cox.net...
> And another for your 33:
> http://www.jeeptech.com/javaAps/Speedo.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> I just found that site. See, that's one of many that says I need a 36
>> tooth
>> gear (which, if the 3% per tooth theory is true, that would make sense).
>> I
>> found another that says I need a 34...\
>>
>> I now have a 33 tooth gear that I can't do anything with. I'm sure the
>> stealership won't take it back (although it only has a few miles on
>> it...).
>> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

That's actually the site that I used. It is linked to from cowtown.

Eric
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:417B40E2.7316703@cox.net...
> And another for your 33:
> http://www.jeeptech.com/javaAps/Speedo.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Eric wrote:
>>
>> I just found that site. See, that's one of many that says I need a 36
>> tooth
>> gear (which, if the 3% per tooth theory is true, that would make sense).
>> I
>> found another that says I need a 34...\
>>
>> I now have a 33 tooth gear that I can't do anything with. I'm sure the
>> stealership won't take it back (although it only has a few miles on
>> it...).
>> I hate to buy another gear just for it to be wrong...

Re: Stinking o-rings and speedo gears
 

I have seen several charts that don't agree.
This one worked for my TJ... I am within 1% now.

http://www.raingler.com/tech/speedoChart.asp

--
JimG
80' CJ-7 258 CID, HEI
4.56 Gears, Lock-Right F&R
35" BFG MT on 15x10 Centerlines
D44 Rear, D30 Front. SOA
Dana 300 w/4:1 & Currie twin sticks
Warn X8000i w/ dual batteries

00' TJ Sport 4.0L, 5sp
4.56 Gears, TrueTrac rear
33" BFG AT on 15x8 Eagle Alloys
D35 Rear, D30 Front. 3" Suspension Lift

"Eric" <gymrat@baileyscorner.com> wrote in message
news:QJGed.5240$p87.2041@fe2.texas.rr.com...
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
> a website (linked to by multiple other sites) said I needed. Finally get
> it installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more
> miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring
> apart that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
> Challenger Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots
> of war wounds.
>
>

Re: Stinking o-rings and speedo gears
 

I have seen several charts that don't agree.
This one worked for my TJ... I am within 1% now.

http://www.raingler.com/tech/speedoChart.asp

--
JimG
80' CJ-7 258 CID, HEI
4.56 Gears, Lock-Right F&R
35" BFG MT on 15x10 Centerlines
D44 Rear, D30 Front. SOA
Dana 300 w/4:1 & Currie twin sticks
Warn X8000i w/ dual batteries

00' TJ Sport 4.0L, 5sp
4.56 Gears, TrueTrac rear
33" BFG AT on 15x8 Eagle Alloys
D35 Rear, D30 Front. 3" Suspension Lift

"Eric" <gymrat@baileyscorner.com> wrote in message
news:QJGed.5240$p87.2041@fe2.texas.rr.com...
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
> a website (linked to by multiple other sites) said I needed. Finally get
> it installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more
> miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring
> apart that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
> Challenger Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots
> of war wounds.
>
>

Re: Stinking o-rings and speedo gears
 

I have seen several charts that don't agree.
This one worked for my TJ... I am within 1% now.

http://www.raingler.com/tech/speedoChart.asp

--
JimG
80' CJ-7 258 CID, HEI
4.56 Gears, Lock-Right F&R
35" BFG MT on 15x10 Centerlines
D44 Rear, D30 Front. SOA
Dana 300 w/4:1 & Currie twin sticks
Warn X8000i w/ dual batteries

00' TJ Sport 4.0L, 5sp
4.56 Gears, TrueTrac rear
33" BFG AT on 15x8 Eagle Alloys
D35 Rear, D30 Front. 3" Suspension Lift

"Eric" <gymrat@baileyscorner.com> wrote in message
news:QJGed.5240$p87.2041@fe2.texas.rr.com...
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what
> a website (linked to by multiple other sites) said I needed. Finally get
> it installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more
> miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring
> apart that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs,
> Challenger Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots
> of war wounds.
>
>

Re: Stinking o-rings and speedo gears
 

Hi Eric,

I have a 35 tooth gear with 4.10 and half-worn 33" BFG MT. When my
speedometer reads 100 km/h, my GPS tells me I'm actually going 99.1 km/h.

If you're certain that you are showing exactly 10% fast with a 33 tooth
gear, then the 36 tooth appears to be what you want. If your error is
closer to 8%, you should try the 35 tooth.

When using charts or calculators (some of which are downright wrong),
remember that new BFG MT 33s are actually 32.8" and that diameter will
decrease with wear.

Steve
http://xjeep.dyndns.org


Eric wrote:
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.

Re: Stinking o-rings and speedo gears
 

Hi Eric,

I have a 35 tooth gear with 4.10 and half-worn 33" BFG MT. When my
speedometer reads 100 km/h, my GPS tells me I'm actually going 99.1 km/h.

If you're certain that you are showing exactly 10% fast with a 33 tooth
gear, then the 36 tooth appears to be what you want. If your error is
closer to 8%, you should try the 35 tooth.

When using charts or calculators (some of which are downright wrong),
remember that new BFG MT 33s are actually 32.8" and that diameter will
decrease with wear.

Steve
http://xjeep.dyndns.org


Eric wrote:
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.

Re: Stinking o-rings and speedo gears
 

Hi Eric,

I have a 35 tooth gear with 4.10 and half-worn 33" BFG MT. When my
speedometer reads 100 km/h, my GPS tells me I'm actually going 99.1 km/h.

If you're certain that you are showing exactly 10% fast with a 33 tooth
gear, then the 36 tooth appears to be what you want. If your error is
closer to 8%, you should try the 35 tooth.

When using charts or calculators (some of which are downright wrong),
remember that new BFG MT 33s are actually 32.8" and that diameter will
decrease with wear.

Steve
http://xjeep.dyndns.org


Eric wrote:
> Ok, two problems today:
>
> 1. I had my wife pick me up a 33 tooth speedometer gear -- as that's what a
> website (linked to by multiple other sites) said I needed. Finally get it
> installed and working, and it's 10% off. Not much of a problem at low
> speeds, but it adds up at highway speeds. Also, it's off in the OTHER
> direction -- says I'm going much faster than I am. Also means more miles...
>
> 2. When installed the new gear, I apparently ripped the little o-ring apart
> that seals the assembly in the transfer case. SO, I have fluid going
> everywhere whenever I drive. AND, none of the parts stores carry that size
> of ring. They said it's a dealer-only. I hope they sell them seperately...
>
> So, I have a useless speedo gear and an out-of-commission vehicle until
> Monday, at the earliest. Fan-freakin-tastic.
>
> Anyone know of a better place other than
> http://www.cowtownjeeps.com/index.as...edo/speedo.htm to check
> what gear I need??
>
> Thanks,
>
> Eric
> 99 TJ SE
> 4" lift, Custom HD dirveshaft w/SYE, SS brake lines, 33" BFG MTs, Challenger
> Rock Rails, 4.0L TB, AirAid Intake, Dynomax cat-back, and lots of war
> wounds.