[Jacques Reed]

Hi Bob,

I also would like some edification.

My Ford F15-A Parts List shows 14 different Spacers in 0.005" increments.
Did GM do the same? I believe that part of the drive train was common to Ford and GM.

Next question is why? Was the manufacturing tolerances so large they needed such a large range. I know bearing preload is affected by small change in distance hence the shims but so many "Teacups". Maybe the "Mad Hatter" was in charge of design!

Even amongst the spacers I have two different designs but perhaps just 2 different foundry suppliers.

Disregard my previous comment about "B". probably just a foundry mark. Found a very faint stamp on one of the larger ones near the horizontal groove. "K" and when miked it is 2.110"
Another large one has what looks like a very faint "H" at the same location and measures 2.095". Both were hard to find. Never stop finding out new things about these trucks

Look forward to some info.

Cheers,