by bore_pig » Fri Feb 22, 2013 12:38 pm
I have this 4wd vibration problem as well. I had a very bad passenger side motor mount that I replaced last fall and the 4wd vibration problem disappeared for nearly 2 months. At the same time the 4wd vibration came back, my bad motor mount noise reappeared. Turns out the heat shield for my passenger side motor mount rotted off and heat from the exhaust already wrecked my new motor mount. I plan on replacing all motor mounts (including a new heat shield) in the spring to see if the 4wd problem goes away again. At that time I will check into the u joints and splined disconnect again too.
35x12.5R15 Xtreme MT, 15x8 AR23 Rims, 2.5" Liftmeister, 3" Body lift, 86 Front springs, Z71 rear springs, 6x5.5 1.5" Wheel Adapters, UCA flip, PCM4LESS, Hi-lift, Fire extinguisher, 2+day Survival kit