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Old 05-09-2014, 08:59 PM   #1
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4lo problem

I was out on the trail and my jeep was stalling in 1st gear 4lo. Can someone point me in the right direction as to help fix this

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Old 05-09-2014, 09:04 PM   #2
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The engine was stalling when you were in 4Lo but not in 4Hi or 2Hi?

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Old 05-09-2014, 09:07 PM   #3
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It was stalling in 4lo in first gear when I hit obstacles. The entire day I had to feather my clutch which wore my leg out. I was thinking I have to increase my idle
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Old 05-09-2014, 10:41 PM   #4
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That's not an idle problem. What tire size, axle ratio, engine size, and transmission type?
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Old 05-10-2014, 06:29 AM   #5
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It's a stock 4.0L I'm running 31" tires and I just bought the jeep so I have no idea the axle ratio
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Old 05-10-2014, 10:53 AM   #6
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Look for the below tag on your axle's differential cover. If present, the tag will indicate the axle ratio. The tag in the below photo is indicating the axle has a 3.73 ratio.
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Old 05-10-2014, 11:05 AM   #7
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Mine reads as follows
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Old 05-10-2014, 11:13 AM   #8
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That is 3.07. Are you giving it a little gas when encountering obstacles, or just trying to idle over them? That gear ratio was the highest ratio that Jeep made which isn't great for your 31" tires, but depending on what you are trying to go over, you should still not be killing your Jeep doing it.
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Old 05-10-2014, 11:15 AM   #9
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Yep 3.07 would be a very good reason it would struggle up obstacles. That's like trying to accelerate away from a stop in 3rd gear instead of 1st gear.
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Old 05-10-2014, 04:16 PM   #10
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I don't blame the engine, you've gotta give it some gas to get over obstacles.
I have 33s and 3.07 (yes...I know, burn me at the stake) and I've never stalled going over something if I'm on the gas. You can't really go creepy crawly over things
But I guess it depends on how big this obstacle is
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Old 05-11-2014, 06:45 AM   #11
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I wasn't blaming the engine. I was just told that may be my problem. Thanks everyone for the help. Anyone know how much a re-gear costs roughly?
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Old 05-11-2014, 11:35 AM   #12
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Roughly $1200-1500
But if you have the Dana 35, and they will be swapping all that already, why not upgrade the axle?
Find a 44 from a TJ Rubi, and you will save a bunch because that 44 will directly swap, you get better brakes, stronger diff, a locker, and you'd only have to regear the front axle.
Cost for that depends on the cost of the 44 you find, if you can.
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Old 05-11-2014, 11:47 AM   #13
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For that price I might as well upgrade the axles!

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