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Thumping noise from tranny hump?

P

pajeepman

NAXJA Forum User
Location
East Norriton, PA
I just picked up a 2000 XJ with a 4.0/aw4/231. Sometimes when idling in drive, I hear a thumping noise and I can feel it if I put my hand on the tranny hump next to the t-case shifter. A little throttle and it goes away, doesn't do it in park (or reverse that I have noticed). Any clue what it could be, t-case chain slop. P/O said it had made that noise fro a long time.
 
transfercase linkage bushing could be shot or the exhaust is hitting the crossmember.

how about crawling under and looking?
 
89xj said:
how about crawling under and looking?
Click to expand...
Tried that, I didn't see anything. It doesn't really sound like a metal to metal noise though, maybe the sound deadening is making it sound different. I haven't had anybody around yet who could sit in it with it in drive while I am under it(with the e-brake on and the wheels choked - be strapped to my truck also).
 
does the noise go away when you put pressure on the transfercase shift lever

i also work in radnor if you want to drive over and i can look under while your in the seat, if the rain ever stops.
 
I can have my GF do it, just haven't had time yet. Thanks for the offer. I haven't tried puttting pressure on the T-t-case lever, I have shifted it in and out of the gears but noise is still around.
 
could be the tc linkage or the trans mount. both are easy fix's
 
89xj said:
does the noise go away when you put pressure on the transfercase shift lever
Click to expand...

The noise does go away when I put pressure on the t-case shift lever. Do you think it is bushings or needs an adjustment?
 
Any idea where there is a drawing/picture breakdown of the t-case and shifter linkage online?
 
I did, I was hoping for an exploded "drawing" like 4WDH and q-tec have in their catalogs for stock replacement parts.
 
I had that noise, exhaust hanger in front of the cross member was broken. Exhaust was hitting the cross member. Some thing to check. Or the linkage to the t case.
 
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