Originally Posted by DodgeDude99
on my '99 Ram, the shim was between the pinion and bearing, on the 44 that i had swapped on my K5 it was between the race and housing.
The shim is on the pinion from the factory. Most aftermarket installation kits include shims to put behind the inner pinion bearing race. I'm not aware of any axles that come from the factory with shims behind the race.