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post #1 of (permalink) Old 10-04-2006, 07:13 AM
2001 WRANGLER
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2\" lift

I put a 2" lift (with springs and shocks only) now every time I take off a little hard it sounds like the driveshaft is knocking. Would lowering the transmission help this.
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post #2 of (permalink) Old 10-04-2006, 07:22 AM
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Re: 2\" lift

I don't think it should be necessary to drop the TC for a 2" lift. Are you sure it's coming from the driveshaft? My OME lift came with the TC drop, but most lifts that small don't.
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post #3 of (permalink) Old 10-04-2006, 07:49 AM
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Re: 2\" lift

i have a similar lift on my tj......

could you describe the noise and condition under which it occurs a little more?
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post #4 of (permalink) Old 10-04-2006, 07:52 AM
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Re: 2\" lift

sounds like it is coming from where the driveshaft goes into the transmission. it has a little vibration but not much.
post #5 of (permalink) Old 10-04-2006, 07:53 AM
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Re: 2\" lift

when I take off fast or under any tork
post #6 of (permalink) Old 10-04-2006, 08:08 AM
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Re: 2\" lift

still not super clear to me what you mean....but its early in the morning by my standard...so we'll attribute the slowness to that.

have you checked your transmission mount? if its worn, then it may cause the trans to move when you apply a lot of torque to it....which might seem to make the driveshaft make odd noises. engine mounts might also do something like this but nearly as much as the trans mount.


have you crawled under there and checked it out?

look for signs of contact between the drive shaft and other things...



normally a 2" lift isnt enough to really mess with your drive shaft angles in any significant way.
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post #7 of (permalink) Old 10-04-2006, 08:16 AM
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Re: 2\" lift

With a new 2" lift, the spring arch may be taking you over 2". That does throw off the angles and could cause problems until the springs settle. You may want to drop the transfer case as a preventative measure (I'm not a fan of this stop-gap measure) and see if it helps. In any case, tif you don't get a handle on the problem, then there'll be a flying drive shaft in your future.

Have you ever changed the U-joints? If not, you may want to do change them, one may be going dry. The added stress of the lift could be causing the vibration. A set of new U-joints wouldn't hurt a thing, and be an inexpensive/easy diagnostic.
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post #8 of (permalink) Old 10-04-2006, 08:29 AM
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Re: 2\" lift

that is what I thought, that's why I went with a 2" lift.

trans mounts look ok, no signs of wear on the u joints, can't see any place where it could be making contact with anything.
post #9 of (permalink) Old 10-04-2006, 08:33 AM
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Re: 2\" lift

thanks I will give that a try.
post #10 of (permalink) Old 10-04-2006, 08:33 AM
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Re: 2\" lift

[ QUOTE ]
no signs of wear on the u joints

[/ QUOTE ]

Did you take all the caps off to check for wear? You can't tell from looking at the outside.
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