All O/D transmissions should have two switches - one is the reverse light
switch, the other is the O/D lockout switch that only allows the O/D to
operate in third and top. Not sure why a non O/D box should have two
switches, although my manual indicates that there were two positions for the
reverse-light switch on the early casing. The vacuum switch was
electrically connected to the overdrive, but not mechanically part of the
gearbox as far as I am aware.
PaulH.
-----Original Message-----
From: Paul A. Tegler, Jr <wizardz@amdyne.net>
>QUESTION: the old non-O/D transmission had two
>2-terminal switches on the right side of the transmission case.
>The O/D transmission has a single reverse sw. on the right
>side but there is also a little switch on the side of extension supporting
>the shifter. Is this the switch that would have been used for the
>vacuums cut off relay used on some of the older years?
>
>
>
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