Plymouth Owners Club

General Category => Technical Discussion => Topic started by: James on June 28, 2007, 11:32:53 AM

Title: Mystery transmission
Post by: James on June 28, 2007, 11:32:53 AM
I recently removed a transmission from my 1938 P6 engine but can not find the transmission case number in any of my parts books. Also, the original paint color of this transmission seems to be black - not silver as on my other 38 transmission. Everyone has told me that Plymouth painted the transmissions silver, like the block. Is this right? Perhaps this is not a Plymouth transmission? Can you help identify this transmission? The number stamped on the case is: 651358
Title: Re: Mystery transmission
Post by: TodFitch on June 28, 2007, 05:57:37 PM
The block and, I think, the bell housing and transmissions were painted black through 1936. In 1937 the block color changed to silver.

I don't have a parts book with me (and I only have 1934 and earlier at home) but that 651358 number sounds about right for a part first manufactured in 1935 or 1936.
Title: Re: Mystery transmission
Post by: JimCno on June 28, 2007, 09:45:42 PM
In my book, the 651s are carburetor parts. Tranny cases start with 631.
Title: Re: Mystery transmission
Post by: James on June 29, 2007, 08:18:33 PM
I have checked the case again - the number stamped in the side is definately 651358.
So, can anyone find this case in their parts books or cross reference book?
Thanks.
Title: Re: Mystery transmission
Post by: Jim Yergin on June 30, 2007, 12:26:33 AM
According to my Mopar Steamliner parts book, the part number for the transmission case assembly used in 1936 Plymouths and Desotos with rear wheel emergency brakes was 651357. For 1936-39 Plymouths and Desotos with transmission emergency brakes, and all 1936-39 Dodges, the part number is 631840. Does your transmission have an emergency brake on it?
Hope this is of some help.
Jim Yergin
Title: Re: Mystery transmission
Post by: James on June 30, 2007, 03:11:52 AM
The transmission case has an emergency brake assembly that attaches just behind it.
Because the part number on the case is so close to the parts book transmission assembly number, it seems reasonable to conclude this transmission case is from a 1936 vehicle. That it was painted black reinforces the conclusion.

Thanks everyone for your research. Now on to reassembling all the parts!
Title: Re: Mystery transmission
Post by: elmo on June 30, 2007, 07:56:05 PM
Hi James   my curiosity got the better of me as i have several spare transmission cases, i have just gone out to check the numbers the first three i checked were out of 37 Plymouths and have the transmission emergency brake, they are painted silver and the number stamped on the side is 651358.these cases are in New Zealand so i dont know if that number has any thing to do with the cars being an export model from Canada.
Title: Re: Mystery transmission
Post by: 12905 on June 30, 2007, 10:03:35 PM
James:

I have seen cases with this number used in Canadian Dodges from 36 - 38 and Dodge/Fargo 1/2 ton pickup trucks from,  if I recall correctly, at least 40 through 48. I don't know about 35 Dodge, or about Plymouths of any year, but I suspect they were used in Canadian Plymouths of the same years as our Dodges.


Title: Re: Mystery transmission
Post by: Wayne on July 01, 2007, 12:17:55 AM
Hi James,
I have a 41 Dodge car tranny with the # 651358. It has? the coolest? shift knob, probably made from soybean. Wayne
Title: Re: Mystery transmission
Post by: James on July 01, 2007, 02:35:52 AM
Wayne may be on to something. The shift knob from this transmission is also unique. My first 38 knob (from a P6) is a plain brown. The shift knob from the "new" transmission has the same shape, but also has a silver ring (about 1 1/2" circumference) embedded into the top - Is this like yours, Wayne?
Title: Re: Mystery transmission
Post by: Wayne on July 06, 2007, 11:01:59 AM
James, It is a 41 DeSoto motor and tranny that I have, "NOT" Dodge that I stated in my last post. The shift knob is cream & brown swirls color about 2 1/5" across 1 1/2" thick, flat on top and flat where it threads on shift stick. It just strikes me as different because of it's shape.
Wayne
Title: Re: Mystery transmission
Post by: James on July 06, 2007, 05:01:34 PM
I carefully cleaned the case and discovered a stamping on the top of the case (under where the shifter plate would fit).
The stamping is "P-1".
This pretty much confirms the suggestion that the case is from a 1936 P-1 Plymouth. It may have been left over inventory (doubtful) or a rebuilt unit attached to the P-6 engine.

Now for reassembly!
Title: Re: Mystery transmission
Post by: elmo on July 06, 2007, 10:27:15 PM
Wayne,
If your motor is a 41 Desoto it looks to me as if the trans has been replaced with a earlier model. I'm sure that 41 Desoto's as were Plymouth ,Dodge and Chrysler, all fitted  with three on the tree steering column change, apart from the Plymouth and Dodge pickups which i think all had stick shifts