Ive got either an M20 or M21 transmission off of a w31 that im going to put on my 70 w30. There are 3 numbers on it. I know that one (30M323388) relates to the car but the other two are 1) P0D07B and 2) 3925661. Can anyone tell me what these numbers mean and if its a M20 or 21?


Thanks

 

The "B" at the end indicates an M21. An M20 would be an "A".

P0D07B - 0 is 1970, D is April, 07 is the day.

3925661 indicates a 1970-74 unit.

Terry

 

I believe the B in PODO7B means M 21.

 

Thanks Terry. Ya I think the other numbers have to do with the build date but im not sure

 

Wow thank you so much! Just found out this is perfect for my car as my car was built the 3rd week in April 70. Great news.

 

yep. casting number for the main case.


Does the W-31 this trans came from still exist by chance?