Stop giving me information on rearends that adjust pinion depth by shimming the rear bearing cup out of the case, and read what I said. Rear ends like the 8 3/4 adjust the depth by shimming the pinion out from the rear bearing and therefore has no affect on preload When putting a gear set in a housing you start with the pinion depth first and then set the preload, I get that. If when it is all assembled, you determine the pinion depth needs adjustment, you can take it all apart and change the pinion shim, and put it back together without changing the pre load. One the type of rear end you keep talking about, you have to change the preload shims the same amount as the cup shims, only opposite.