What gear ratio should I install in my Jeep Wrangler TJ / LJ? (and other re-gearing FAQs)

O just opened the thread how identify jeep axles and I see 3.07 listed as well as 3.55. I assume everyone wants to get to go yo 4:11 or higher to get more power.
 
Firstjeepbuild said:
O just opened the thread how identify jeep axles and I see 3.07 listed as well as 3.55. I assume everyone wants to get to go yo 4:11 or higher to get more power.
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Rubicon axles came stock with 4.10's and lockers 😉

butters stotch soup GIF by South Park
 
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reddvltj said:
4.56 would be more than a little on the high side for 35s IMO, if you were staying with 33s the 4.56 would be okish, you'd probably shift out of high gear a little more often than you do with stock tires and gearing. 5.13s would be to 35s what 4.56 is to 33s
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What did you end up with? I have the 2000 TJ with 33’s and 3.56 gears. Same tranny as you. Driving up anything with over a 3% grade is not fun. Mainly street driver, with some dirt roads, hills occasional small ledges and mud on a few weekends a year. Shop I contacted recommends 4:56.
 
TJ’er said:
What did you end up with? I have the 2000 TJ with 33’s and 3.56 gears. Same tranny as you. Driving up anything with over a 3% grade is not fun. Mainly street driver, with some dirt roads, hills occasional small ledges and mud on a few weekends a year. Shop I contacted recommends 4:56.
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Assuming you meant 3.55, that was not an option on 2000 TJs. They stopped ovvering 3.55 for the 1998 model year, which is where 3.73 replaced 3.55. So you should have 3.07 or 3.73. For 33's and the 5 speed, I would go with 4.88 myself.
 
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TJ’er said:
What did you end up with? I have the 2000 TJ with 33’s and 3.56 gears. Same tranny as you. Driving up anything with over a 3% grade is not fun. Mainly street driver, with some dirt roads, hills occasional small ledges and mud on a few weekends a year. Shop I contacted recommends 4:56.
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You want 4.88
 
TJ’er said:
What did you end up with? I have the 2000 TJ with 33’s and 3.56 gears. Same tranny as you. Driving up anything with over a 3% grade is not fun. Mainly street driver, with some dirt roads, hills occasional small ledges and mud on a few weekends a year. Shop I contacted recommends 4:56.
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With my 97 I ran 4.56 and 33s but I had the AX5, and since it was a 4cylinder Jeep I didn't use 5th very often when I was out on the open highway or climbing hills at highway speed.

For your set up if you know without a doubt you're never going to need/want to regear again you could get away with 4.56s but I would probably go with the 4.88 just for a few hundred extra RPM to give you back that highway hill climbing ability.

AX5 gear ratios: 3.92, 2.33, 1.44, 1.00, 0.85 and 4.74

NV3550 gear ratios: 4.10, 2.33, 1.39, 1.00, .78 and R3.57
The image below if from grimmjeepers calculator. the RPMs you experience might be slightly different if your spedometer is accurate due to variances in true tire heights, but it wont be by much. As someone who has just recently seen
4.56 gears .................................................................................................. 4.88 gears
1708127250768.png



As someone who recently discovered what a couple hundred RPM can do climbing a slight incline I can tell you it does make a difference

My current 03 TJR vs the 2000 TJ I sold. The 2000 could climb the local hill into town in 5th (OD) the 2003 (AW4) can not without shifting out of OD. Here's the specs on those 2 TJR on the left TJ on the right
1708128257744.png
 
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