Re: Overdrive for 1939 packard

Posted by Ross On 2022/6/3 7:10:32

Any 39-50 junior overdrive trans will fit. The overdrive does not add on to the back of your existing trans, they are built as a unit with the trans. I wouldn't get hung up on having the exact R6 unit that would be original to a 39 unless that level of originality is somehow critical. The exact unit will be hard to find. Most of the people who would care about that detail can not get their walkers close enough to the car to notice.

Whatever model you end up with R6, R9, or R11, you will need the relay and etc that match that unit. And you will need to have your driveshaft shortened.