I notice that MGBs with Type-D overdrives had vacuum switches, as well as the
driver's switch and the switch in the transmission that inhibits the o/d
unless you're in 3rd or 4th gears.
Cars with Type-LH overdrives don't have the vacuum switch.
I assume the vacuum switch made the o/d switch out when you got on the
throttle, and let the o/d kick back in when you let off the throttle, like
"passing gear" on a automatic transmission. This seems like a "good thing." I
wonder why it wasn't used in the later cars?
Also, anyone in the Northeast US have a driveshaft for an O/D car (73)? I
guess it's a little shorter than the shaft used on a non-O/D car.
Also need the column-mounted combination wiper-O/D stalk.
Cheers,
Jim
73B
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