Quote:

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I've put a non-lockup A518 in my '73 Dart and made a seperate electrical switch to turn on the OD, but the only time the OD actually works is when the trans goes into 3rd.
There's no OD-function in first or second gear.

Did you have any other modifications done to your transmission so it's actually somewhat of a 6 speed now?

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No.. but I can AND HAVE flipped the switch and seen
the revs jump up... in all 3 gears... why do you
think it would be in third(high gear) only if its
a separate unit of the trans... this trans was a 3
pin with OD and lock up... I changed the pump and
input so it could use a high stall 727 conv.. its a
5000 rpm stall in this unit
EDIT
All I did was use a Trans-go shift kit on this trans
which did have a few minor changes in the VB.. mainly
shift points