Normally the 2.5L engine with a manual will be geared at 4.10's, but I guess
they may have 3.07's with the automatic (the auto 4.0L does). You would want
to get at least 4.10 gears. If you already have 4.10 gears, consider 4.56.

Your transmission doesn't have an overdrive, so after you regear get used to
your tach being at around 3000RPM at highway speeds and your gas mileage
going south.

You'll also need to replace your speedometer sender gear with one that will
compensate for the new gears. The shop doing the gears can do it.

<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com...
> On Feb 24, 2:31 pm, "Earle Horton" <graci...@usa.com> wrote:
>> <hammertc2...@yahoo.com> wrote in message
>>
>> news:1172344565.073873.112240@8g2000cwh.googlegrou ps.com...
>> ...> Yes, I guess your right, getting rid of the auto trans and the 32's
>> > would improveperformance:)
>> > Unfortunately, getting rid of the auto trans is not an option as I
>> > only have one leg to drive with. As for the tires...well...I'd like
>> > to keep them. So anyperformanceminor mods available while
>> > still keeping the auto and 32's?
>>
>> Cat-back exhaust and 4.0 liter throttle body won't set you back much,
>> especially since exhaust doesn't last forever. I found on mine that the
>> mileage improved more than the power from engine mods. What you really
>> need
>> to do is regear the axles.
>>
>> Earle
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>

 

Normally the 2.5L engine with a manual will be geared at 4.10's, but I guess
they may have 3.07's with the automatic (the auto 4.0L does). You would want
to get at least 4.10 gears. If you already have 4.10 gears, consider 4.56.

Your transmission doesn't have an overdrive, so after you regear get used to
your tach being at around 3000RPM at highway speeds and your gas mileage
going south.

You'll also need to replace your speedometer sender gear with one that will
compensate for the new gears. The shop doing the gears can do it.

<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com...
> On Feb 24, 2:31 pm, "Earle Horton" <graci...@usa.com> wrote:
>> <hammertc2...@yahoo.com> wrote in message
>>
>> news:1172344565.073873.112240@8g2000cwh.googlegrou ps.com...
>> ...> Yes, I guess your right, getting rid of the auto trans and the 32's
>> > would improveperformance:)
>> > Unfortunately, getting rid of the auto trans is not an option as I
>> > only have one leg to drive with. As for the tires...well...I'd like
>> > to keep them. So anyperformanceminor mods available while
>> > still keeping the auto and 32's?
>>
>> Cat-back exhaust and 4.0 liter throttle body won't set you back much,
>> especially since exhaust doesn't last forever. I found on mine that the
>> mileage improved more than the power from engine mods. What you really
>> need
>> to do is regear the axles.
>>
>> Earle
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>

 

a performence 2.5 jeep motor is a oxymoron

hammertc2000@yahoo.com wrote:

> hey all,
>
> Last week purchased a 1997 Wrangler SE (2.5L), automatic
> transmission. It has large 32" tires and lift kit.
> Nice looking but performance is poor. If I could eek-out another
> 10-15 horsepower it would be much more drivable around town and on the
> highway.
> My questions are:
> Does anyone have experience with performance mods; air-intake,
> exhaust, etc. for the 2.5L 4cylinder?
>
> Also, how can I tell what gear ratios I have? Judging from the
> performance with the 32"'s I'm guessing I have the stock Dana 35's. ...
> ( 0-60 in about 5 minutes on flat ground. No chance of even hitting 60
> on a hill :)
>
> Any opinions on reputable/reliable JEEP performance parts places?
>
> I have no books or documentation on my JEEP yet but I am learning
> about it by trial and error!
> Any help would be appreciated. Someday I will be able to give back!
>
> TJ

 

a performence 2.5 jeep motor is a oxymoron

hammertc2000@yahoo.com wrote:

> hey all,
>
> Last week purchased a 1997 Wrangler SE (2.5L), automatic
> transmission. It has large 32" tires and lift kit.
> Nice looking but performance is poor. If I could eek-out another
> 10-15 horsepower it would be much more drivable around town and on the
> highway.
> My questions are:
> Does anyone have experience with performance mods; air-intake,
> exhaust, etc. for the 2.5L 4cylinder?
>
> Also, how can I tell what gear ratios I have? Judging from the
> performance with the 32"'s I'm guessing I have the stock Dana 35's. ...
> ( 0-60 in about 5 minutes on flat ground. No chance of even hitting 60
> on a hill :)
>
> Any opinions on reputable/reliable JEEP performance parts places?
>
> I have no books or documentation on my JEEP yet but I am learning
> about it by trial and error!
> Any help would be appreciated. Someday I will be able to give back!
>
> TJ

 

a performence 2.5 jeep motor is a oxymoron

hammertc2000@yahoo.com wrote:

> hey all,
>
> Last week purchased a 1997 Wrangler SE (2.5L), automatic
> transmission. It has large 32" tires and lift kit.
> Nice looking but performance is poor. If I could eek-out another
> 10-15 horsepower it would be much more drivable around town and on the
> highway.
> My questions are:
> Does anyone have experience with performance mods; air-intake,
> exhaust, etc. for the 2.5L 4cylinder?
>
> Also, how can I tell what gear ratios I have? Judging from the
> performance with the 32"'s I'm guessing I have the stock Dana 35's. ...
> ( 0-60 in about 5 minutes on flat ground. No chance of even hitting 60
> on a hill :)
>
> Any opinions on reputable/reliable JEEP performance parts places?
>
> I have no books or documentation on my JEEP yet but I am learning
> about it by trial and error!
> Any help would be appreciated. Someday I will be able to give back!
>
> TJ

 

You can't have performance and 32" tires.
You should have 4.10 gear ratio stock, as the four banger can't pull
anything more.
The Chevy small block or Vortex where made for you car, via
http://www.advanceadapters.com/catalog/003.html
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>



--
Posted via a free Usenet account from http://www.teranews.com

 

You can't have performance and 32" tires.
You should have 4.10 gear ratio stock, as the four banger can't pull
anything more.
The Chevy small block or Vortex where made for you car, via
http://www.advanceadapters.com/catalog/003.html
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>



--
Posted via a free Usenet account from http://www.teranews.com

 

You can't have performance and 32" tires.
You should have 4.10 gear ratio stock, as the four banger can't pull
anything more.
The Chevy small block or Vortex where made for you car, via
http://www.advanceadapters.com/catalog/003.html
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>



--
Posted via a free Usenet account from http://www.teranews.com

 

You have 4.10 gearing. 4.56 will return some performance and gas mileage.
Get the 4.56 gears, cat-back and 4.0 throttle body, and be happy.

FWIW, my 89 YJ 2.5L pushed my 33's around town and on the highway with no
problems, but it was a five speed. The 2.5L is a great engine.

HTH

Carl


<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com...
> On Feb 24, 2:31 pm, "Earle Horton" <graci...@usa.com> wrote:
>> <hammertc2...@yahoo.com> wrote in message
>>
>> news:1172344565.073873.112240@8g2000cwh.googlegrou ps.com...
>> ...> Yes, I guess your right, getting rid of the auto trans and the 32's
>> > would improveperformance:)
>> > Unfortunately, getting rid of the auto trans is not an option as I
>> > only have one leg to drive with. As for the tires...well...I'd like
>> > to keep them. So anyperformanceminor mods available while
>> > still keeping the auto and 32's?
>>
>> Cat-back exhaust and 4.0 liter throttle body won't set you back much,
>> especially since exhaust doesn't last forever. I found on mine that the
>> mileage improved more than the power from engine mods. What you really
>> need
>> to do is regear the axles.
>>
>> Earle
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>

 

You have 4.10 gearing. 4.56 will return some performance and gas mileage.
Get the 4.56 gears, cat-back and 4.0 throttle body, and be happy.

FWIW, my 89 YJ 2.5L pushed my 33's around town and on the highway with no
problems, but it was a five speed. The 2.5L is a great engine.

HTH

Carl


<hammertc2000@yahoo.com> wrote in message
news:1172350151.251419.221200@m58g2000cwm.googlegr oups.com...
> On Feb 24, 2:31 pm, "Earle Horton" <graci...@usa.com> wrote:
>> <hammertc2...@yahoo.com> wrote in message
>>
>> news:1172344565.073873.112240@8g2000cwh.googlegrou ps.com...
>> ...> Yes, I guess your right, getting rid of the auto trans and the 32's
>> > would improveperformance:)
>> > Unfortunately, getting rid of the auto trans is not an option as I
>> > only have one leg to drive with. As for the tires...well...I'd like
>> > to keep them. So anyperformanceminor mods available while
>> > still keeping the auto and 32's?
>>
>> Cat-back exhaust and 4.0 liter throttle body won't set you back much,
>> especially since exhaust doesn't last forever. I found on mine that the
>> mileage improved more than the power from engine mods. What you really
>> need
>> to do is regear the axles.
>>
>> Earle
>
> Good point about the exhaust. Better gas mileage wouldn't hurt
> either. Worth the try at least.
> Regearing the axles does make the most sense. I just need to figure
> out what I have and how to change them. I'm not looking for much
> performance gain.
>
> Thank you for your advise. I much appreciated it.
> TJ
>