Not totally correct, which is why OD was limited to 3rd and 4th on the MGB.
The lower the gear the higher the torque reversals inside the OD, and the
stronger it has to be to resist them. Overpower it and you get slipping and
glazing of the linings. Some cars with a stronger OD had OD in 2nd as well.
Conversely the V8 with its higher torque reversals than the 4-cylinder was
modified to restrict it to 4th only during its production run. North
American spec cars from 77 to 80 were limited to 4th gear only for
completely different reasons.
That will damage the OD over time, but as said having OD engaged in reverse
will destroy it much more quickly!
PaulH.
----- Original Message -----
> ... O/D in any orward gear would be OK, it's the reverse rotation issue
> that causes the trouble.
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