My vibration problem is not with my 5.9, but my Laredo, which has the D35 and is open diff. My 5.9 has never had any vibration problem like this actually, even after swapping transfer cases and doing the lift kit.
I'm thinking I should do my rear wheel bearings for starters and go from there, just really don't have the time or energy right now, lol.
The howling immediately went away after doing the pinion bearings though, pretty cheap and easy enough fix.
Originally Posted by Candymancan
Well if you want an update from me, i had the dealer change the rear diff with the mopar stuff and additive, and i also got the tires balenced. 2 were out of the balence. Vibration and noise is still there..
I recall a thread on another forums where alot of 5.9's have the same problem, so its probably some defect in these truck's. No one has figured it out yet either. in that thread anyway, however one person suspects its the NP249J transfer case. However if that were the case, then you wouldnt be having the problem with your 242, so i dunno. I suspect the noise i hear also is the pinion bearing