2004 jeep tj 42rle and 35s gear ratio

Dsallows

Active Member
Joined
Oct 22, 2015
Location
Fayetteville nc
I plan on throwing 35s on my tj and yes I already have everything ready so please don't pester me with those details. The one thing I am not sure of is what gear ratio to go with the crappy 42rle transmission I have seen on other forums that 5.13 is ideal with 35s but I have heard that 4.88 is great too it's my daily driver so it's got to be as close to stock as possible
 
Probably has a D30 front so 5.13's are out. I ran 4.56 in my 98 5 speed TJ on 35's with no issues on or off road. Running 5.13's on my 06 rubicon with a 6 speed and 37's and to me is perfect. I'd say if mostly highway and URE every now and then 4.56. Mostly off road and little highway use go with 4.88.
 
@Jody Treadway knows best in this area. Never even been in an automatic Jeep so no idea of the shitty OD. Can't bring myself to get an automatic Jeep and I wouldn't have an automatic sports car either. I know that they are better for crawling but I do just fine in my opinion offroad for what I want to achieve.
 
obullfish said:
Probably has a D30 front so 5.13's are out. I ran 4.56 in my 98 5 speed TJ on 35's with no issues on or off road. Running 5.13's on my 06 rubicon with a 6 speed and 37's and to me is perfect. I'd say if mostly highway and URE every now and then 4.56. Mostly off road and little highway use go with 4.88.
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One company makes 5.13s for a dana 30 now

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Jody Treadway said:
Low pinion Dana 30 5.13 gears... I've heard of them but never installed them. Based on 4.56 vs 4.88, those teeth gotta be pretty small!
I'd steer a client away from them personally.
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Dustin has a set of high pinion in his bronco that's high pinion. But I agree I tried to get him to get 4.88s but they have held up so far

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42RLE, 4.88s and 35s is right at 2,500 rpm at 75.

Just remember, if you wheel your rig (especially if locked) a warranty doesn't do you any good to get off the trail with broken r&p.
 
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