Speedo wrong, but is that all?
10-03-2003, 10:05 PM
#21
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
Man, you aren't going to be a happy camper when you open that front up.
The 94's have a locked front axle setup, no vacuum or anything else to
turn it on. You spin one wheel in the air, the driveshaft must turn....
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
The Hurdy Gurdy Man wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
The 94's have a locked front axle setup, no vacuum or anything else to
turn it on. You spin one wheel in the air, the driveshaft must turn....
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
The Hurdy Gurdy Man wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
10-03-2003, 10:23 PM
#22
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
http://www.rubicon4x4.com/catalog/in...75_76_1175_233
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
10-03-2003, 10:23 PM
#23
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
http://www.rubicon4x4.com/catalog/in...75_76_1175_233
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
10-03-2003, 10:23 PM
#24
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
http://www.rubicon4x4.com/catalog/in...75_76_1175_233
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
Mike Romain wrote:
>
> Man, you aren't going to be a happy camper when you open that front up.
>
> The 94's have a locked front axle setup, no vacuum or anything else to
> turn it on. You spin one wheel in the air, the driveshaft must turn....
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
10-03-2003, 10:37 PM
#25
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
You sure there's not a small lump on the passenger side of the axle
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
10-03-2003, 10:37 PM
#26
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
You sure there's not a small lump on the passenger side of the axle
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
10-03-2003, 10:37 PM
#27
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
You sure there's not a small lump on the passenger side of the axle
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
with some vacuum lines running to it? Start the engine, pull the tc
into 4-HI and give it a few seconds. "PART TIME" light should come
on. Leave the shift lever there and shut the engine down. NOW jack
up one wheel and try it. You have to engage the front axle before you
get anything otherwise the little stub axle on the passenger side
spins merrily along just as you describe. If the drive shaft still
doesn't turn, you probably won't like what you find when you take the
cover off the front diff.
3.07 sounds like stock gearing for the 4.0L manual.
On Sat, 4 Oct 2003 00:18:56 UTC The Hurdy Gurdy Man
<bryan@linux.webicommerce.com> wrote:
>
> I have what is clearly the world's worst news feed being that none of the
> replies to my original post have shown up yet, but I can see on Google that
> there have been quite a few. Thanks to all that have replied! Here's what
> I've done and discovered so far, but it's raised a few more questions as a
> result (isn't that always the way?).
>
> I put one rear tire up in the air, shifted into neutral, marked a spot on
> the tire, spun it twice and counted the number of turns of the driveshaft.
> This gave me about 3.08 ~ 3.10 turns for two tire rotations... accounting
> for any slop in the process, I'm guessing this means I have 3.07 gears on
> the rear. It's a 1994 with a 4.0L engine and a five speed manual
> transmission, which I'm assuming is reasonable. So then I tried this same
> procedure with the front, but... nothing. With one tire on the ground, one
> in the air, and the various gear selectors moved into all kinds of different
> positions (in gear, neutral, 2WD, 4WD, etc.) I couldn't get the driveshaft
> to move while I turned the wheel. I don't see any sort of locking mechanism
> on the wheel hubs, and the only tube running into the front differential
> that seems like it migh control something on the inside seems to only be a
> vent tube that runs up by the radiator, so I'm not sure what I'm missing
> here... sometimes you can turn the driveshaft by hand and get a very slight
> bit of movement in the wheel, but definitely nothing solid and absolutely
> not the other way around. Is there some different trick I should be trying
> here? I'm a stranger to the ways of 4WD, and my shop manual is still four
> days out, so I'm at a loss for what to try next. It seems to me the lgoic
> behind the procedure is sound, but then I could very well be overlooking
> something critical.
>
> The speedometer is most decidedly an electronic one and not cable driven,
> and presumably has been since the day it was born as the gauges have never
> been changed. The tires are slightly larger than the originals, but that
> was the case before the accident and the speedo offset due to that was a
> fairly minor one. Certainly not the 15 or so MPH it's reading off now. I
> see that quadratec.com sells a recalibration box, plus there's a bevy of
> potential speedometer gear changes that can be done, so once I figure out
> exactly why it's incorrect I'll make my next move. It is possible that some
> portion of the drivetrain was swapped out during the repair, especially
> considering how much cleaner the transmission is than various other parts of
> the car... but that information is only suggestive of what happened, and not
> conclusive.
>
> I'll get under there this weekend and pop out the current speedo gear to see
> what it is. I don't want to pop open the front differential cover and
> actually count gear teeth, but if that's the only solution then I will.
> It's probably overdue for a fluid change anyhow. There's also a temptation
> to just put the thing up on four stands and put it in gear to see what
> happens... might be a faster way of figuring out what's up with the front
> differential!
>
> Thanks again to everyone who has helped on this rather perplexing problem,
> hopefully I'll be to the bottom of it soon.
>
> Bryan
>
--
Will Honea
10-04-2003, 03:22 AM
#28
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
Up to a 95 has the vacuum disconnect?
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
10-04-2003, 03:22 AM
#29
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
Up to a 95 has the vacuum disconnect?
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
10-04-2003, 03:22 AM
#30
Guest
Posts: n/a
Re: Speedo wrong, but is that all?
Up to a 95 has the vacuum disconnect?
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
Ok, he just needs to put it in 4x4 and drive it a couple feet to click
it in then first.
Mike
"L.W.(ßill) ------ III" wrote:
>
> http://www.rubicon4x4.com/catalog/in...75_76_1175_233
>
> Mike Romain wrote:
> >
> > Man, you aren't going to be a happy camper when you open that front up.
> >
> > The 94's have a locked front axle setup, no vacuum or anything else to
> > turn it on. You spin one wheel in the air, the driveshaft must turn....
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
