Gearing Help, 33" tires, automatic - JeepForum.com

 
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post #1 of 9 Old 07-01-2010, 03:52 PM Thread Starter
unbreakable
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Gearing Help, 33" tires, automatic

I have a 97 tj with a 4" lift and 33" tires, 4.0 automatic' D35. I need some advice on what gears to go to in order to get some power back. This is my daily driver and I do not off road it. thanks for some help.

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post #2 of 9 Old 07-01-2010, 05:40 PM
Jerry Bransford
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Since you don't offroad (yet) and this is for street/highway use, I'd go with 4.10 for 33" tires and your 3-speed automatic. Even if you start offroading 4.10 will still be a good ratio for your particular transmission.

Gone wheeling, back Sunday evening.

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post #3 of 9 Old 07-01-2010, 05:51 PM
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wow, i just noticed your user name... and the D35... wow. good for you.

gearing is a tough choice. you only want to do it once and be done with it. are you POSITIVE you are not going to step up to 35s EVER?

4.10s, just like JB said. otherwise 4.56. good luck.

Mail crawling.
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post #4 of 9 Old 07-01-2010, 06:04 PM
Wheelin98TJ
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4.10 or 4.56.

I prefer 4.56 for the little extra low end power.

With 4.56, RPM will be about 3,500 at 70 MPH.

If you are not comfortable with that, 4.10 would be a better choice for you.
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post #5 of 9 Old 07-01-2010, 06:53 PM
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I have a 97 tj Auto w/35's and 4.10. I love it. Perfect set-up for me
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post #6 of 9 Old 07-02-2010, 12:21 AM Thread Starter
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Thanks guys. Now what all am I looking at replacing to regear to 410? Is this something I can do myself? Can someone point me in the right direction bc I am curious at cost and parts. thanks again
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post #7 of 9 Old 07-02-2010, 06:31 AM
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You may come out cheaper if you can find a set of used stock D30/D35 axles out of a 4 cylinder TJ and swap both entire axles. Then you could sell yours and get some oney back. The 4 cylinders came with 4.10s.


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post #8 of 9 Old 07-02-2010, 10:32 AM
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Originally Posted by unbreakable View Post
Thanks guys. Now what all am I looking at replacing to regear to 410? Is this something I can do myself?
Not really unless you are willing to buy the special tools and are willing to spend time to learn how to do it right. It's a very tedious and exacting procedure to properly set up the relationship between the ring & pinion gears and if not done perfectly, the new gears will be ruined in short order.

It'd such a demanding job that if you go to a 4x4 shop with say 6 mechanics, odds are that only one or two will be trusted well enough to do their ring & pinion installations.

Gone wheeling, back Sunday evening.

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post #9 of 9 Old 07-02-2010, 05:07 PM
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Quote:
Originally Posted by NotURMailman View Post
The 4 cylinders came with 4.10s.
Thay also came with 3:73 and 4:56 gears...
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