So I've read the threads about the Timken Set 10 with Timken 9912 seals, and to make sure the shaft collars are there. However, the picture I see includes a backing plate that mine does not seem to have (I have a 2005 Rubicon with rear disc brakes); and yes, I know the rear disc brakes "need the backing plate with the lip on it". Yet when I look at mine on my rig the axle has the 4 bolts onto a plate, but the plate is one solid piece that is integrated into the disc brake apparatus. Am I missing something about that backing plate?