Can someone ID these two Transmissions? Thanks.

P7H29
3885010 case
3857584 tail
no vin


POB25A
3925661 case
3857584 tail
vin 10W212595

Thank You

Sure-
P7H29= P=muncie
7=1967
H=Aug
29= 29th day

P0B25A=
P=muncie
0=1970
B=Feb
25= 25th day
A= Wide Ratio-M20
vin 10W212595 is a Nova trans if i am not mistaken,
Hope this Helps. Mike

The P7H29 transmission is Model Year 1967 and since it's August it was assembled in 1966.

But "H" isn't August. P7H29 would be June 29th, 1967, for a late 1967 car.

:thumbsup:

Ed

Quote- 'But "H" isn't August. P7H29 would be June 29th, 1967, for a late 1967 car".

OOPS! I had brain fade, forgot that trans have there own unique month dates . Me bad. LMAO.

Could the H not also be June29th/66 for a 67 model year car Ed? Correct me if i am wrong but could not a early build Sept.66 built 1967 car have this trans? The trans were stockpiled were they not? When 1967 cars started production could this trans have laid around for approx 2 months? What was the normal lag on trans assembly dates to production dates? My own 06A Z28 trans is dated almost 2 months before my cars production date.
Just wondering?

http://www.camaros.org/numbers.shtml#TransmissionNumbers

Here you go Al. Now you decode for yourself.

Could the H not also be June29th/66 for a 67 model year car Ed?

Yes, I think that's possible. In this case, since there's no VIN, this transmission could have been used in a very early 1967 (Say like August, 1966) or very late 1967 model.

Ed

What is the date of this tranny and from what kind of car?
POH17A
10W385631

Muncie M20, assembled on June 17th, 1970 and installed in the 285,631st 1970 Nova built at the Willow Run plant.

Ed

This one is being advertised as an M22 and does have the bottom drain plug, but no "C" in it's numbers. http://www.sell.com/22XQFH I thought one characteristic of the M22 trannys that is different than the others was the bottom drain plug.

POH17A is the code he listed in the ad. A at the end tells you it's an M-20. Any of the 20's or 21's could have the drain plug drilled and tapped like the 22's.

That is not an M22 it is an M20. When the muncies went to the fine spline and large output they all got the drain plug. If you look at the cluster gear in the pictures you will notice it has 2 rings or grooves just like the output shaft for an M20.

That Muncie looks like it has the 10 spline shaft and the numbers say it is a '70 model. Someone must have drilled and tapped for the drain plug.
Thanks for the info guys.
Andrew

Andrew, for 1970, only the Chevelle M22 got the fine spline. All others received the corse spline as in the previous years. the fine spline became standard for all cars in 1971.

Ed

All 1970 model year and later Muncie main cases have drain plugs from the factory, M-20's, M21's and M-22's... Crash

What kind of car did this one come from?
Main case p/n 3925660,side cover p/n3884685,extension housing p/n 3857584
Date code P9C04C, vin no. stamp is 19W473238

Muncie M22 assembled on March 4th, 1969 and installed in a 1969 L78 Nova built at the Willow Run plant. However, it has a 68 side cover.

Ed

Are these M21 or M22 gears?

Andrew, those are M20/M21 cut. Look HERE (http://www.camaros.org/trans.shtml) to see the difference.
Ed

Yes, comparing them to your linked picture they do look to be the M20/M21 angle cut.

Thank you,
Andrew