What overdrive tranny will fit a P26 engine?

[47heaven]

Have been thinking about having an overdrive tranny put in my P15 with a P26 inline 6 engine. What year Plymouth, Dodge or Chrysler trannies will work with this engine? This will help me know which one to find while looking.

[BobT-47P15]

I would suppose the Borg Warner R10 overdrive would work in your car....

I have a 1957 Plymouth engine in my car.....and the previous owner had an R10 behind it. The same tranny I have.....as I bought it from him, but did not put it in when installing the engine.

[Plymouthy Adams]

Mid year 1952 introduces the OD in Plymouth..6 volts I think through 1955..12volts afterwards through 58 in cars...you will see the R10 cast into the unit on the passenger lower side I think...not sure if the OD continued in use with the itroduction of the slant 6 engine...never followed these cars past early fifties..

[BobT-47P15]

So, that poses the question....how do you tell what year car the overdrive was originally used in, and therefore if it is a 6v or 12 unit originally in terms of the solenoid. Is there any listing of part numbers for the o'drives?

I have been assuming mine to be 6 volt.....but the electrics went to 12 volt in 1957 -- I think. Although my engine, according to the number on it, is from 57.....was this tranny behind it when new? When I found the engine, it was in a 1951 Plymouth with the R10 attached....but the overdrive part was not being used therefore not wired up. Another mystery.

[martybose]

The unfortunate thing about the BW overdrives is that 6V and 12V solenoids do not interchange because of a design change. If you don't have one that matches the voltage of your car, you've got a problem.

I'm going through this myself, as my car is now 12V but my OD is 1951 vintage 6V. There are 12V relays you can use, but the solenoid is another story, because it has both a holding and a shifting function. One outfit I talked to tried to come up with a 12V to 6V system for the OD, and gave up.

Marty

[blueskies]

So, that poses the question....how do you tell what year car the overdrive was originally used in...

Bob-

There is a date stamp on the side of the case, right on the edge of the flange of the case that mates to the bell housing. Mine was very faint, it took some scrubbing with a fine wire brush to find it. The date will tell you if yo have 6v or 12v. Mine was from a 1955 Dodge.

Pete

[blueskies]

The unfortunate thing about the BW overdrives is that 6V and 12V solenoids do not interchange because of a design change. If you don't have one that matches the voltage of your car, you've got a problem.

Marty

Marty-

My '55 Dodge overdrive came with 6v stuff, and I replaced it with 12v. I bought the 12v solenoid from Neil Riddle, and it was exactly the same as the original, except it was 12v, not 6v. Been working fine for 6,000 miles. I think the regular R-10 overdrives, in either 6v or 12v have the same design for the solenoids. Perhaps the 12v solenoid you got was for a later design OD, maybe after '58? I think they changed them at some point but don't know for sure.

I'd give Neil Riddle, George Asche, or David Pollock (POC advisor) a call, sounds to me like you've been given some mis-info...

Pete

[Young Ed]

There is another OD that came out after the R10. I'm thinking in 57. Either way whenever it came out if you had electrics for that one they probably wouldnt work on the R10.