[s-cars] V8 Torsen rear

[Dave Forgie]

Beg to differ, IIRC, there was also a 3.89:1 rear diff for early
automatic V8s.  We need 4.11 to 1  Best to confirm the turns it takes
either by turning the input shaft and counting the output turns or vice
versa.  If it is tad MORE than 4, then you have the right one; under 4
its the wrong one.  The consequences of installing a 3.89:1 diff are
very very bad.

Count once, install once.  Forget to count, install twice.

Dave F.