> I'm trying to figure out the ratio of a rear end. I may be going
> loopy but
> when I spin the pinion flange it seems as though the brake drums can spin
> independently and my chalk marks don't seem to be a reliable
> means of counting
> the number of revolutions per turn(s) of the pinion flange.
>
> Am I missing something?
Nope, that's exactly the way a differential should work (unless it's a
limited slip). You'll need to stop one drum from turning (and then halve
the ratio you measure).
Randall
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