


During the install, I remembered
that "someplace safe" where I stashed the old pinion shims during my move.
The shim pack including baffle was .039". That would have been nice to know!
Here's why........ 

Most/Many/Some pinions have a nifty number marked with a "+", "" or "0". These numbers
indicate the best running position for the gear. This part is a little
confusing. A positive number indicates the number of shims that should be
REMOVED. Think of a one foot ruler that is
three inches too long. To fix it, you chop three inches off. Of course the
opposite would be true as well. If your ruler were 3, you'd add three
inches. The other significant number in this case
169 should have a matching number on the ring gear. This lets you know that
these gears are a matched set. Buying used gears? I'd check that out!
Unfortunately not all gears are marked. 

My new pinion is a +6. Using the
information above, we can figure that we need .003 less shims than the
original + 3 pinion. ASSUMING the original gears
were setup correctly, the following will be a very good starting shim pack.
The original shim pack being .039, minus an addition .003
= .036" 

If you're confused, refer to this chart which
I copied from the Dana Service Manual. Take note that all possible
combinations are not presented. 

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