'40 Plymouth R7 O/D bolt up to '47 Dodge D25?

[bamfordsgarage]

I've been offered an R7 overdrive from a originally-equipped 1940 Plymouth and am very interested.  I would expect this is a direct bolt up to my 1947 Dodge D25 bell housing and flywheel (long block, three-speed, not Fluid Drive)

 

Can someone confirm if this is a direct fit or if anything else is required?  Thank you.

[greg g]

Wasn't the linkage different on the 40 trans?  Otherwise why not??

[55 Fargo]

Chris I would like to say it is a fit, but should not from lack of "direct knowledge".

The Canadian built engines from at least 1940, would have the 8 bolt crank, and the same clutch housing as the same as the 1946-48, all 3 spd standards from this period and beyond should be a direct fit. I would see no other reason for it not to.....

[40phil41]

Not sure how applicable this is but my '40 Dodge has a D24 engine (Canadian long block of course) and I installed an R10 overdrive as a direct bolt in. No problems with the install at all.

 

Phil

[BobT-47P15]

I'm thinking, based on past posts, that the R7 won't fit in a newer car that took an R10 (like '46 & newer).

  But I don't recall why. 

Couldn't pull up any old posts on the topic. 

[bamfordsgarage]

Thanks everyone for your comments.

 

I have determined from my parts book that the P9/P10 bellhousing and flywheel are a different part# than the P15/D25, however, the clutch plate and housing are the same. I have asked the vendor for photos of the front flange and rear drive flange/plate, and dimensions for: pilot shaft diameter, pilot shaft tip to front flange and front flange to rear drive.  I will compare these to my spare D25 non-overdrive transmission and that should give a better idea.

[Young Ed]

Thanks everyone for your comments.

 

I have determined from my parts book that the P9/P10 bellhousing and flywheel are a different part# than the P15/D25, however, the clutch plate and housing are the same. I have asked the vendor for photos of the front flange and rear drive flange/plate, and dimensions for: pilot shaft diameter, pilot shaft tip to front flange and front flange to rear drive.  I will compare these to my spare D25 non-overdrive transmission and that should give a better idea.

 

The 40 is the first full model year for column shift and I believe some of them used a cable system rather than rods. That may be solved simply by retaining your non OD shifting arms.

[greg g]

You might want to give George Asche a call in regard to the specifics.  I believe he is familiar with both the OD units.