Do you think they're trying to tell you something?
http://go.jeep-xj.info/HowtoSpeedoGears.htm
If your TJ still uses a cable, then you could install a reduction gear,
or maybe the 27 tooth gear it's self from a speedometer calibration shop
found in your Yellow Pages.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Stewie wrote:
>
> After having 31" tires on my 97 TJ for five years, I finally got around
> to putting in the correct speedo gear. Or so I thought. I have 3.07
> gears so I need a 27 tooth gear. The problem is that Chrysler doesn't
> make a 27 tooth gear with the correct shaft length. It looks like my
> only option is the heat gun route. Does anyone have some suggestions on
> removing the gear from the wrong shaft and putting it back together on
> the right shaft without royally screwing things up? I'll probably use
> some epoxy or super glue for extra holding power since I'm not sure how
> well it would stay together on its own after having been heated.

 

Do you think they're trying to tell you something?
http://go.jeep-xj.info/HowtoSpeedoGears.htm
If your TJ still uses a cable, then you could install a reduction gear,
or maybe the 27 tooth gear it's self from a speedometer calibration shop
found in your Yellow Pages.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Stewie wrote:
>
> After having 31" tires on my 97 TJ for five years, I finally got around
> to putting in the correct speedo gear. Or so I thought. I have 3.07
> gears so I need a 27 tooth gear. The problem is that Chrysler doesn't
> make a 27 tooth gear with the correct shaft length. It looks like my
> only option is the heat gun route. Does anyone have some suggestions on
> removing the gear from the wrong shaft and putting it back together on
> the right shaft without royally screwing things up? I'll probably use
> some epoxy or super glue for extra holding power since I'm not sure how
> well it would stay together on its own after having been heated.

 

Do you think they're trying to tell you something?
http://go.jeep-xj.info/HowtoSpeedoGears.htm
If your TJ still uses a cable, then you could install a reduction gear,
or maybe the 27 tooth gear it's self from a speedometer calibration shop
found in your Yellow Pages.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Stewie wrote:
>
> After having 31" tires on my 97 TJ for five years, I finally got around
> to putting in the correct speedo gear. Or so I thought. I have 3.07
> gears so I need a 27 tooth gear. The problem is that Chrysler doesn't
> make a 27 tooth gear with the correct shaft length. It looks like my
> only option is the heat gun route. Does anyone have some suggestions on
> removing the gear from the wrong shaft and putting it back together on
> the right shaft without royally screwing things up? I'll probably use
> some epoxy or super glue for extra holding power since I'm not sure how
> well it would stay together on its own after having been heated.

 

That is a really nice web page, someone put a lot of work into it.

If your calculations all double check out then I think it might be time to
contact another Chrysler (not Jeep) dealer and see if they have the gear you
need or perhaps better and cheaper would be an independent speedometer shop.
If you live near a big city look in the phone book.

If you need a distant shop I'm sure we can get you some recommendations.
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Stewie" <CWise1978@aol.com> wrote in message
news:1127787031.418658.201540@o13g2000cwo.googlegr oups.com...
> According to these websites and some other postings I've seen by people
> with my same setup, I need a 27 tooth gear.
>
> http://www.sierrajeep.com/speedome.htm
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
>
> and the equation (NewGear*NewTire=OldGear*OldTire) solving for new
> gear. This came from http://www.jeeptech.com/javaAps/Speedo.html
>
> I'll check out the numbers on my speedo and try your equation, too.
>
>
> Billy Ray wrote:
>> One important piece of information which is required is the number of
>> revolutions it takes your speedometer to register one mile. On most
>> modern
>> cars, this may be found on the bottom (or elsewhere) of the speedometer
>> face, usually in very small numbers. Look for something like 940, 960,
>> 1000,
>> or 1020, or something close. This number is the number of speedometer
>> cable
>> revolutions (or equivalent in the case of electronic sender units) to
>> increment the odometer one mile. Most speedometers (modern ones) are 1000
>> revs/mile, and this is a good starting number to use.
>>
>> Another vital piece of info is the speedometer drive/driven gear ratios,
>> the
>> gears inside of the transmission or transaxle. The drive gear is the one
>> which is turned by engine power, usually mounted right on the
>> transmission
>> output shaft. The driven gear is the one which is "driven" by the "drive"
>> gear, and is connected to the speedometer cable or electronic sender. The
>> numbers entered in the program are the integer number of teeth - just
>> count
>> 'em up.
>>
>> For example:
>>
>> rev/mile: 1000, tire diameter 31", differential: 3.07, drive teeth: 15
>> (count them on your TJ) will result in a 30 tooth 'driven' gear.
>>
>> Running the equation backwards keeping everything else the same and using
>> a
>> #27 gear you would have 35" tires.
>>
>> You can also calculate using drive shaft revolutions/mile (assuming 1:1),
>> axle ratio and tire size.
>>
>> There are additional formula to use, how did you arrive at 27?
>>
>> Have you contacted an 'actual' speedometer shop? There should be at
>> least
>> one in any fair sized city. If necessary you can contact one via
>> phone/fax/e-mail.
>> --
>> .
>> Billy_Ray@SPAM.fuse.net (remove SPAM)
>> 2002 Jeep WJ 4 Liter Automatic
>> Sharing is why we are all here....... or should be.
>

 

That is a really nice web page, someone put a lot of work into it.

If your calculations all double check out then I think it might be time to
contact another Chrysler (not Jeep) dealer and see if they have the gear you
need or perhaps better and cheaper would be an independent speedometer shop.
If you live near a big city look in the phone book.

If you need a distant shop I'm sure we can get you some recommendations.
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Stewie" <CWise1978@aol.com> wrote in message
news:1127787031.418658.201540@o13g2000cwo.googlegr oups.com...
> According to these websites and some other postings I've seen by people
> with my same setup, I need a 27 tooth gear.
>
> http://www.sierrajeep.com/speedome.htm
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
>
> and the equation (NewGear*NewTire=OldGear*OldTire) solving for new
> gear. This came from http://www.jeeptech.com/javaAps/Speedo.html
>
> I'll check out the numbers on my speedo and try your equation, too.
>
>
> Billy Ray wrote:
>> One important piece of information which is required is the number of
>> revolutions it takes your speedometer to register one mile. On most
>> modern
>> cars, this may be found on the bottom (or elsewhere) of the speedometer
>> face, usually in very small numbers. Look for something like 940, 960,
>> 1000,
>> or 1020, or something close. This number is the number of speedometer
>> cable
>> revolutions (or equivalent in the case of electronic sender units) to
>> increment the odometer one mile. Most speedometers (modern ones) are 1000
>> revs/mile, and this is a good starting number to use.
>>
>> Another vital piece of info is the speedometer drive/driven gear ratios,
>> the
>> gears inside of the transmission or transaxle. The drive gear is the one
>> which is turned by engine power, usually mounted right on the
>> transmission
>> output shaft. The driven gear is the one which is "driven" by the "drive"
>> gear, and is connected to the speedometer cable or electronic sender. The
>> numbers entered in the program are the integer number of teeth - just
>> count
>> 'em up.
>>
>> For example:
>>
>> rev/mile: 1000, tire diameter 31", differential: 3.07, drive teeth: 15
>> (count them on your TJ) will result in a 30 tooth 'driven' gear.
>>
>> Running the equation backwards keeping everything else the same and using
>> a
>> #27 gear you would have 35" tires.
>>
>> You can also calculate using drive shaft revolutions/mile (assuming 1:1),
>> axle ratio and tire size.
>>
>> There are additional formula to use, how did you arrive at 27?
>>
>> Have you contacted an 'actual' speedometer shop? There should be at
>> least
>> one in any fair sized city. If necessary you can contact one via
>> phone/fax/e-mail.
>> --
>> .
>> Billy_Ray@SPAM.fuse.net (remove SPAM)
>> 2002 Jeep WJ 4 Liter Automatic
>> Sharing is why we are all here....... or should be.
>

 

That is a really nice web page, someone put a lot of work into it.

If your calculations all double check out then I think it might be time to
contact another Chrysler (not Jeep) dealer and see if they have the gear you
need or perhaps better and cheaper would be an independent speedometer shop.
If you live near a big city look in the phone book.

If you need a distant shop I'm sure we can get you some recommendations.
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Stewie" <CWise1978@aol.com> wrote in message
news:1127787031.418658.201540@o13g2000cwo.googlegr oups.com...
> According to these websites and some other postings I've seen by people
> with my same setup, I need a 27 tooth gear.
>
> http://www.sierrajeep.com/speedome.htm
> http://go.jeep-xj.info/HowtoSpeedoGears.htm
>
> and the equation (NewGear*NewTire=OldGear*OldTire) solving for new
> gear. This came from http://www.jeeptech.com/javaAps/Speedo.html
>
> I'll check out the numbers on my speedo and try your equation, too.
>
>
> Billy Ray wrote:
>> One important piece of information which is required is the number of
>> revolutions it takes your speedometer to register one mile. On most
>> modern
>> cars, this may be found on the bottom (or elsewhere) of the speedometer
>> face, usually in very small numbers. Look for something like 940, 960,
>> 1000,
>> or 1020, or something close. This number is the number of speedometer
>> cable
>> revolutions (or equivalent in the case of electronic sender units) to
>> increment the odometer one mile. Most speedometers (modern ones) are 1000
>> revs/mile, and this is a good starting number to use.
>>
>> Another vital piece of info is the speedometer drive/driven gear ratios,
>> the
>> gears inside of the transmission or transaxle. The drive gear is the one
>> which is turned by engine power, usually mounted right on the
>> transmission
>> output shaft. The driven gear is the one which is "driven" by the "drive"
>> gear, and is connected to the speedometer cable or electronic sender. The
>> numbers entered in the program are the integer number of teeth - just
>> count
>> 'em up.
>>
>> For example:
>>
>> rev/mile: 1000, tire diameter 31", differential: 3.07, drive teeth: 15
>> (count them on your TJ) will result in a 30 tooth 'driven' gear.
>>
>> Running the equation backwards keeping everything else the same and using
>> a
>> #27 gear you would have 35" tires.
>>
>> You can also calculate using drive shaft revolutions/mile (assuming 1:1),
>> axle ratio and tire size.
>>
>> There are additional formula to use, how did you arrive at 27?
>>
>> Have you contacted an 'actual' speedometer shop? There should be at
>> least
>> one in any fair sized city. If necessary you can contact one via
>> phone/fax/e-mail.
>> --
>> .
>> Billy_Ray@SPAM.fuse.net (remove SPAM)
>> 2002 Jeep WJ 4 Liter Automatic
>> Sharing is why we are all here....... or should be.
>

 

Uh, maybe I shouldn't be using a 27 tooth gear? Maybe I'll look into a
speedo gear shop. Way back when I first got my tires, I went to an
independent repair shop and they were talking about clipping wires and
redoing cables just to adjust the speedometer. Needless to say, I got
the heck out of there.

I already have the long-shaft 27 tooth gear. Hopefully the parts
department will take it back since I haven't gotten to it with the head
gun yet.

 

Uh, maybe I shouldn't be using a 27 tooth gear? Maybe I'll look into a
speedo gear shop. Way back when I first got my tires, I went to an
independent repair shop and they were talking about clipping wires and
redoing cables just to adjust the speedometer. Needless to say, I got
the heck out of there.

I already have the long-shaft 27 tooth gear. Hopefully the parts
department will take it back since I haven't gotten to it with the head
gun yet.

 

Uh, maybe I shouldn't be using a 27 tooth gear? Maybe I'll look into a
speedo gear shop. Way back when I first got my tires, I went to an
independent repair shop and they were talking about clipping wires and
redoing cables just to adjust the speedometer. Needless to say, I got
the heck out of there.

I already have the long-shaft 27 tooth gear. Hopefully the parts
department will take it back since I haven't gotten to it with the head
gun yet.

 

Dodge trucks use the same gears as the Jeep TJ. I forget what I needed to
correct my TJ's speedo, but the Dodge gear did the trick. (It was, however,
more expensive than the Jeep gear, but at least it had the right tooth count.)

Dean
http://home.comcast.net/~1redcreek/

On 26 Sep 2005 17:29:00 -0700, "Stewie" <CWise1978@aol.com> wrote:

>After having 31" tires on my 97 TJ for five years, I finally got around
>to putting in the correct speedo gear. Or so I thought. I have 3.07
>gears so I need a 27 tooth gear. The problem is that Chrysler doesn't
>make a 27 tooth gear with the correct shaft length. It looks like my
>only option is the heat gun route. Does anyone have some suggestions on
>removing the gear from the wrong shaft and putting it back together on
>the right shaft without royally screwing things up? I'll probably use
>some epoxy or super glue for extra holding power since I'm not sure how
>well it would stay together on its own after having been heated.