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Old 06-22-2018, 07:27 AM
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35’s to 37’s

I have a 2014 JK, it’s got a 3.5 AEV suspension lift. I’m presently running 35’s for tires but I’d like to go to 37’s. Do I need to modify anything?

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Old 06-22-2018, 10:08 AM   #2
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Can you just toss on tires and go? Yes. Should you? I wouldn't recommend it.

Recommend: axle truss and gusset, beefier tie rod, if you actually wheel and use your lockers - hydroassist steering. May as well replace rear axle shafts as they will not last long with 37s (outer flange will bend). And a proper regear. If you have stock 3.73/4.10 gearing, you are already undergeared with 35s - 37s will make it that much more painfully obvious.

In short order every other part of your Jeep is under a ton more stress and will wear much faster - ball joints, front axle shafts, draglink etc etc etc.
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Old 06-22-2018, 01:56 PM
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There’s Dana 44s for front and rear axles. The gears have already been changed.
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Old 06-23-2018, 11:48 AM   #4
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There’s Dana 44s for front and rear axles. The gears have already been changed.
What gear ratio?

D44 unreinforced is not up to 37s.
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Old 06-23-2018, 04:26 PM   #5
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Quote:
Originally Posted by Wclarklocal57 View Post
I have a 2014 JK, it’s got a 3.5 AEV suspension lift. I’m presently running 35’s for tires but I’d like to go to 37’s. Do I need to modify anything?
You will probably have to do some trimming on the tub pinch seam in front of the rear tires, maybe the back one too depending on the backspacing on your wheels. It's not real hard to trim it, and it wouldn't take much to clear. Alternative is a 1" body lift. I see guys running 40s on D44's on both Jeeps and Trucks, they are tougher than many think.

There is always a chance of breaking something, if it's your daily driver you need to be prepared if you do break it.
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Old 06-23-2018, 04:30 PM   #6
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What gear ratio?

D44 unreinforced is not up to 37s.
Another thing a lot of people forget about after doing what needs to be done to get those bigger tires rolling, is stopping. Upgrading the stock brake set up is a must.
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