Jeep 4wd Clunk

[Twister]

Looking for some help. My brother has a 92 Cherokee, 4wd, manual, d30 front and d35 rear axles. His jeep has 3 in lift and front adjustable track bar, he has a clunk in the front end when put into and driven in 4wd, both low and hi.

The clunk does not increase with engine rpms, but increases with vehicle speed. The truck does not make the noise when the front drive shaft is removed.

He has replaced

both front axle shaft u-joints
both rear drive shaft
front front drive shaft u-joint
ball joints withing 20k miles
Driver side Unit Bearing

Any input is will be greatly appreciated.

 

[martin]

Common problem on them things is the double cardan joint in the front driveshaft. the centering ball wears and allows the shaft to flop around.

 

[Twister]

Well he swapped in a different front drive shaft and it seems to have gone away

Thanks for the tip