[TR] high engine rpm

[Randall]

>  But I am still gonna try  it for myself
> because I am sure that I remember the wheels spinning 
> opposite directions
> when they are both free.  But maybe that happens when you 
> turn one wheel not
> the drive shaft. 

Right.  With an open diff, if you turn one wheel, generally the other wheel
turns backwards and the driveshaft doesn't turn.  More friction in the
driveshaft, because it has to turn the transmission and also turns faster
(has a taller effective gear ratio from the wheel than the other wheel
does).

But if you block one wheel from turning and turn the other wheel, the
driveshaft will turn (assuming the transmission is out of gear <g>) at half
the speed it would turn if both rear wheels were turning the same direction.

Randall


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