What gears?

[04tj_aoc]

I have an 04 sahara auto 4.0 with 42rle and dana 30/35( planning on super 35) , and want to run 35s, any idea what gears to get?

 

[Duck Doctor]

5.13 is as deep as you can go with the Dana 30. 5.38 is more optimal but won't work with your setup.

 

[CodyP]

Check out this thread. I think it covers everything you need.

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

Jan 3, 2019

I wanted to make a thread about recommended gear ratios to help out fellow TJ / LJ owners. My reason for this is because we see this question come up all the time, and it could be helpful for new owners to have a thread like this to reference. Those "gear ratio" charts you see floating around the internet are notoriously inaccurate, especially when you consider that they don't take two of the most important factors into consideration: which engine you have, and which transmission you have. Those factors are absolutely crucial (along with tire size) when making a decision on which gear...

• Chris
• Replies: 582
• Forum: TJ Resources

• 

 

[JMT]

I have an 04 sahara auto 4.0 with 42rle and dana 30/35( planning on super 35) , and want to run 35s, any idea what gears to get?

5.13
Revolution

 

[DirtDawg]

Mine had 35s when purchased 5 months ago (in combo with 5.13 gearing - Dana 44 combo) but I changed to 33s, which work a bit better with the 42RLE trans. IMO, another inch of axle/diff clearance wasn't worth the tradeoffs for my own usage.

 

[jjvw]

Mine had 35s when purchased 5 months ago (in combo with 5.13 gearing - Dana 44 combo) but I changed to 33s, which work a bit better with the 42RLE trans. IMO, another inch of axle/diff clearance wasn't worth the tradeoffs for my own usage.

33s and the 42rle would work even better with 5.38. The reality is the 5.13 gears most are able to use are appropriate for a 31" tire and will get the engine close to 3k rpm at 75mph.

 

[TheBoogieman]

5.13 isn't nearly enough for 35s and that auto.

 

[TheBoogieman]

I have an 04 sahara auto 4.0 with 42rle and dana 30/35( planning on super 35) , and want to run 35s, any idea what gears to get?

Save your cash for more upgrades to run 35s safely anywhere, except the Walmart parking lot. Even those speed bumps will bend a stock tie rod.
p.s. Jerry B made me say that.