[baron_]

1965 I know
Supposedly a 'late' 1965 transmission
But can someone tell me if it's corvette or chevelle specific?
I'd guess a chebby muncie

i'm just curious....and wouldn't mind learning how to better ID them, if possible
M20/m21/m22 and whatnot...without pulling it apart (I know a/b/c for later muncies)
mainly that VIN # on this one...what that might mean
I understand i might have to count gears to tell between m20 and m21

 

[Mike]

By the info I've got :

3884685 side cover - 1966-68

F270964 - Flint assembly plant ,so it's not a Vette trans , & sequence number

PO508 - Muncie built on May 8

3851325 case - 1964-65

More info:
http://www.muncietrans.com/new_page_12.htm

Tom will probably have more info to add or correct something I have incorrect.

 

[baron_]

Nice ID page. Thank you

I'm assuming this is an M20? Or do I need to pull it apart to count gears, to tell?

One other muncie ID page says that side-cover was in use in late 1965 as well
http://www3.sympatico.ca/atkinsom/history.html#Description
So I'm guessing it's a 1965 one

And no rings on the input shaft means it's probably an M20?

 

[Mike]

Ratios were indicated by the groove rings on the input shaft :

Ratios of the M20 , M21 , M22

Year 1963-1965 Type: M20 Rings: None Ratio: 2.56 / 1.91 / 1.48 / 1.00 / 3.16

Year 1966-1974 Type: M20 Rings: Two Ratio: 2.52 / 1.88 / 1.46 / 1.00 / 3.11

Year 1963-1974 Type: M21 Rings: One Ratio: 2.20 / 1.64 / 1.28 / 1.00 / 2.27

Year 1967-1974 Type: M22 Rings: None Ratio: 2.20 / 1.64 / 1.28 / 1.00 / 2.27

 

[baron_]

painless

thank you, Mike

 

[JodysTransmissions]

Post a picture of the case with a birds eye view of the top. I'll need to see the rear top bolt boss for the year.

 

[crashent]

With the "P" number stamped on the side cover flange, that says 1964 model year...
1965 model year and later Muncie's had "P" number stamped on right side of main case...
The top boss of the main case where the middle top tail housing bolt goes should be rounded in front...
The rounded boss was used into the early 1965 model year...
Hope this helps... Crash

 

[baron_]

 

[JodysTransmissions]

May 08, 1964