when moving forward from a stop position rear end making rough noise almost like gears sliping. it's a 4x4 GMC SIERRA
Notice that when truck goes into gear say from a
dead stop. The rear end starts vibrating rough like
it's slipping out of gear. Afterwards the rest of the
gears are fine. It's a4x4 and only thing I did recently
was engage 4x4 when moving in drive position.
Also I changed out the air filter. Any ideas?