I have a 1990 xj 4.0 with a 3.5" lift as of recent i have been noticing something clunking beneath my my seat. It generally happens when I hit abump in the road or when I slow down or even when I go to turn and the wait of the xj shifts.

I got under to investigate but I could not Figure out what it could be. I tryed to wiggle the transfer case, drive shaft, exahst and some other things.

Maybe some one has had this issue befor and has an idia what it could be.

THANS

Bill McCarthy.....

 

Have you checked the U joints?

 

no but i did try to wiggle the drive shaft and it seemed solid. it happens when im in two wheel drive as well. its like some thing is lose

 

does it sound more towards the rear under your ***? could be the shock bushing clunking on the bar pins as you hit a bump/corner. go look the upper rear shock mounts and give em a wiggle. if theres movement in the bushing thats probably what it is. look into some bar pin eliminators...
http://roughcountry.com/jeep_xtras_b...liminator.html
will give the bushing the proper preload, gives you an extra 1'' on your shocks, eliminates the weak factory bar pins and makes it way easier to replace your shocks.

 

right on i will look right now and first that came to mind on naming your jeep is rock busters like gohst busters. lol

 

lol kinda goes though....who are my friends always calling when their truck breaks down....me

 

nope the shocks seem fine... but the clunking seems to be right under my feet.. but i dont see any thing right there that would do it. so it might be verbing from some where els.. oh and heres an odd one for ya. my altinator went out for a week and i was just charging the batt to get me around till i get the time to replace it then yesterday it started working agen. Weird!@!!!!!

 

you have a loose wire/connection somewhere. or you got your alt completely soaked and it finally dried out hehe..

 

well i live in minnesota and now durring the thaw i have been playing in the mudd and the water. its been fun.. its my first jeep. i had a ranger that i dropped a v8 in and had fun till the x got it. and if you are wondering about the name billszcar its cause i have 3 datsun 280 z cars...

 

aint that a *****. and ya welcome the the realm of the unibody jeep and the horrors associated with it lol. and those are fun lil cars...vroom vroom

 

do you know if there is anything on top of the trans that could have come lose?

 

no nothing that would make a clunk sound. check your tranny mounts and your engine mounts...could be coming from there.

 

right on i will check that out next. i was thinking that because of the lift maybee its the slip yokes..?

 

that would cause a vibration not a clunk. describe the clunk a lil more...does it feel like a suspension clunk or like a something hitting clunk?

 

well i guess its not really as mutch of a clunk as it is a heavy rattle...