[Mgs] MGB O/D

[Phil Bates]

We need to be careful about saying it's a bolt-on addition.  One can not
simply bolt an MGB overdrive unit onto an existing run of the mill non-OD
gearbox.  It takes a different shift mechanism, a different intermediat
spacer, a different output shaft, a wiring harness, and a different
driveshaft.  No minor task.

Lot's of good discussion about how the overdrive works though.

Phil Bates
'67 MGB - converted from non-OD to OD gearbox.

> It's a bit like a 2-speed auto gearbox and is a bolt-on addition to the
> manual gearbox.

SNIP