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Old 11-28-2009, 06:07 PM   #1
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Knocking sound on take-off?

I have what sounds like a knocking sound coming from take off. It seems to happen when I am letting out the clutch to take-off or when I hit a bump. Seems to do it most when it is still cold but is getting more noticebale even when completely warmed up. The sound seems to eminate right around the transfer case area or center of the cab area when driving. It's not an engine knock but more like maybe a bushing or something. Rear end was recently rebuilt last week and that is all good. Any thoughts what this could be? Would a throw out bearing make this sound? Seems like it has been one costly repair after another since I got this 70,000 mile rig, as in two grand already. Any help is greatly appreciated!

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Old 11-28-2009, 06:16 PM   #2
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It's your transfer case shifter. It's attached to a bracket mounted on the body. The bushing has worn out, and probably is completely gone. Theres a couple options. You can replace the little bushing in the shifter, or you can get an aftermarket bracket that completely bypasses the body mounted oem bracket.

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Old 11-28-2009, 06:24 PM   #3
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Thanks Jeepers. Is this a relatively easy DIY job to change out the bushing? Also, where would I find the bushing part to replace and on the transfer case? Any damage to continue to daily drive until I get it fixed? Also, any recommendations on the aftermarket bracket?
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Old 11-28-2009, 06:26 PM   #4
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catalytic converter mine just turned 70k and does the same thing, go underneath when car is cold and hit the cat and you will hear it rattle or slam the pass. door that also makes it rattle. but the good news is it a cheap fix about 160.00 but you dont have to get it done right away.
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Old 11-28-2009, 06:38 PM   #5
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Just checked the CC and nothing there. It sounds a lot like Jeepers post as it's a definitive knocking more so than rattling. When I first started noticing it I would jiggle the transfer case shifter to see if there was any play, so that sounds like a spot on assessment. Now just figuring out how to get the part(s).
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Old 11-28-2009, 06:53 PM   #6
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Old 11-28-2009, 06:54 PM   #7
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Old 11-28-2009, 07:01 PM   #8
yes, I want some cheezy poofs
 
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Quote:
Originally Posted by JDsDream

Nothing in that link related to the problem fix.

It is a very common issue. Had it on every TJ I've had but one.
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Old 11-28-2009, 07:04 PM   #9
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Quote:
Originally Posted by Bryans2000TJ View Post
Now just figuring out how to get the part(s).
That link was for the part so I think that we have got it all covered. How and where.
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Old 11-28-2009, 07:07 PM   #10
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Thanks guys, I really do appreciate it! I may go the route with the bushing replacement via the technical bulletin.

So to continue to DD is not a big issue then, would that be correct?
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Old 11-28-2009, 07:43 PM   #11
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Turn up the radio and go with it. It's fine. If it really bothers you too much before you're able to to do the fix, get you some good automotive silicone. Get the type that dries plyable, not the type that dries solid. Get in there where the little ball end piece fits into where the bushings were and gob it up really good. Once it dries it will still function, but will absorb alot of the friction that makes the knock. It's temporary but will quiet it down until you get the kit to fix it.

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