OD transmission ID

[Kevinb71]

I have found an OD transmission for sale that the owners "is quite sure' is a mopar OD. How does one identify this for sure. I have searched and found no photos of just the transmission. I did find one picture of where the R10 numbers are to be found, but this may be older as he has many 37-42 cars. Any help would be appreiciated.

[Don Coatney]

Here is a picture. Not sure what is what as these are not my transmissions.

[Kevinb71]

Don

Are the long input shafts for Fluid drive? I have just not ever seen one out of the vehicle. The input on this trans is much shorter.

[Alshere59]

Overdrives have electrical solenoids like the tranny far right that Don posted. The years you say he has I believe would make it an R7. They have one solenoid and will have R7 embossed on the case. As far as fitting Mopar L6 engines that would be a comparison. Mopar fluid drive etc. My tranny is getting pulled this week as part of an engine swap. It is an 1940 R7 so I could post picture then if you want.

Al

[BobT-47P15]

I believe my overdrive has raised letters on the case which say

Borg Warner R 10.

And, what kind of car would you be putting an OD in, if you got one?

[suntennis]

The OD section which is attached to the back of the 3 speed transmission will be the area where the R 10 marking is found. I think the R 10 was not in use prior to 1952 production. In 1956, these units had 12 volt solenoid and speed or govenor on them. George Asche at phone 814-354-2621 will be able give you more things such as input shaft length etc to check prior to purchase.

[Kevinb71]

My desire would be to put this in my 49 Chrysler Club Coupe. It presently has an M6 Fluid Drive. I am not sure if the shifter will work without modification. I would like OD so we can cruise better with it.

[Kevinb71]

Al

Is your transmission a manual without Fluid Drive or a Fluid drive? I would really like to see the pics i you would be so kind when you get the chance.

[Alshere59]

Sorry for the delay. Here are the pics. The extension is 6 inches long for scale.

It is not a fluid drive.

Al

Edited November 10, 2010 by Alshere59
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[HotRodTractor]

Is there a list of ID numbers and where to look on the transmissions for them? I recently acquired another "long" engine out of a Desoto that included a transmission - I never looked at the transmission until I got it home and I know there is at least one electric solenoid on the side of it - and I thought there is two (but it could be my memory - I might be young, but have too much chit going on...). I believe it to be out of a 53' or a 54' Desoto based on what I was told by the previous owner.

Maybe I need to head down to the shop and snap a picture....

[Alshere59]

ID number is on the tail shaft. Look at the first pic. R7B-1 other numbers are right behind the solenoid. R7 has a single solenoid the R10 has 2 from what I understand.

Edited November 11, 2010 by Alshere59
More info

[suntennis]

The R10 has one solenoid and one speed control switch. The speed control is cylindrical like a solenoid and at a certain driveshaft speed acts as a switch to allow one to get into the overdrive gearing.

[HotRodTractor]

Well - I didn't get any pics, my camera is dead. I would assume mine is a fluid drive unit due to the length of the bell housing (very deep with a clutch lever back near the transmission). It has a solenoid with another "device" right beside it, plus a pressure sensor in the top of the case near the solenoid. On the driver's side of the case there is a round cover with half a dozen bolts holding it on- probably 8" or so in diameter. there is a small drum brake on the output of the transmission. But all in all - it doesn't really match anything that I have seen pictures of in this thread. It seams to be much more compact in length (other than the stretched out bell housing).

I looked and only saw one casting number on the case (could have missed another one - it needs cleaned bad and I didn't spend a long time looking), but it didn't clearly say R7 or R10 - I neglected to write it down which doesn't help you guys help me. I'll try and get some pics tomorrow with a charged camera and take a bit longer to look for casting numbers.

I would love to ID this thing and get it put up for sale - I have no use for it and I am sure that someone else does.

Jason

[moose]

"I looked and only saw one casting number on the case (could have missed another one - it needs cleaned bad and I didn't spend a long time looking), but it didn't clearly say R7 or R10 - I neglected to write it down which doesn't help you guys help me. I'll try and get some pics tomorrow with a charged camera and take a bit longer to look for casting numbers.

I would love to ID this thing and get it put up for sale - I have no use for it and I am sure that someone else does.

Jason"

Sounds to me like an M6. Tip-Toe for the Desoto?

[HotRodTractor]

Sounds to me like an M6. Tip-Toe for the Desoto?

After a little Google search and a couple of minutes of reading I think you might be correct. I'll snap some pictures tonight when I get home so someone to confirm. It sounds like a pretty interesting little transmission - but not some oddity that I really want in my pickup.