1970 M22 Muncie Anyway to tell what car it is from?

[David R.]

Hi: I have a 1970 M22 Munice transmission. Is there a way to find out what kind of car this came out of ?

Dave

[Warren F.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

The transmission should have an assembly stamping on the main case, near the attachment of the tail housing. If it came from the factory in a car, there should also be a vin derivative stamping. This stamping would tell you what model it came from.

[Michael J.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

My '67 has a service replacement M-21 Muncie that I am told is a 1970. It has a drain plug on the main case and a 3925660 case casting number. However, it has no VIN derivative or date code stamp.

[David R.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

I'll get the numbers off it tonight when I get home. But I was thinking the stampings just gave you the VIN # , date & "A,B & C" code. C being M22.
Does the Vin derivative give you the car info?

Dave

[Jay G.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

I'll get the numbers off it tonight when I get home. But I was thinking the stampings just gave you the VIN # , date & "A,B & C" code. C being M22.
Does the Vin derivative give you the car info?

Dave

Many times the VIN no. will give a letter. K, B, A etc. would relate to a Chevelle build Kansas, Baltimore, Atlanta, FRA= Framingham Mass etc. N or L could be Camaro build Ohio and Los Angles etc. C code is M-22 Rockcrusher. But Open up trans look for and see the cut teeth or maybe Not. Some times the guts aren't always coincide w the C dellinage.

[John H.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

Does the Vin derivative give you the car info?

Dave

Dave -

Yes, the VIN derivative stamping will tell you what model year and assembly plant the car was built in.

[Michael J.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

I'll get the numbers off it tonight when I get home. But I was thinking the stampings just gave you the VIN # , date & "A,B & C" code. C being M22.
Does the Vin derivative give you the car info?

Dave

Not sure about C3s, but with C2s it gives the last six numbers of the VIN preceded by the year (6-7, etc.) and the S for Saint Louis assembly (Corvettes only).

[David R.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

It does have the C code & the straight cut gears.

Dave

[David R.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

What if the assembly plant made more than one model that year?
I'll check tonight to what numbers I have.

Dave

[Michael J.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

What if the assembly plant made more than one model that year?

Dave

Well then I guess you will just have narrowed it down to a few models. But M22s were pretty special and rare trannys, I would bet no Impalas or Biscaynes or trucks came with them. Mostly Corvettes, Camaros, and Chevelles.

[Joe L.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

What if the assembly plant made more than one model that year?
I'll check tonight to what numbers I have.

Dave

Dave-----


If the plant made more than one model, you can't tell which model from the VIN derivative stamped on the transmission. However, I think that the first character of the VIN derivative might have identified the car line (e.g. 1= Chevrolet) as some plants manufactured more than one car line. Otherwise, one might be able to narrow down the model in which it was originally installed by the VIN sequence number.

As a matter of fact, St. Louis was a perfect example. St. Louis was once the largest assembly complex in the entire GM system. The "S" plant identifier was used in the VIN regardless of whether the car was a Corvette or an Impala. So, as far as I know, it would be possible to have a transmission VIN stamping exactly the same for a Corvette or an Impala of the same serial number sequence. However, there were a lot more Impalas made than Corvettes, so if the VIN serial number sequence was higher than the total number of Corvettes made that year, then the transmission had to be out of an Impala (or, some other model made at St. Louis).

The whole issue is quite academic, though. There was no difference between a Muncie installed in a Corvette and those used for most other GM cars using a Muncie. So, what real difference does it make what car the transmission was actually originally installed in?

[David R.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

[quote= So, what real difference does it make what car the transmission was actually originally installed in?[/quote]

I've had the transmission around for years and was just wondering what car it may have came out of.

Dave

[John H.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

I've had the transmission around for years and was just wondering what car it may have came out of.

Dave

Dave -

Post the VIN derivative (and the Muncie "P"-code) and we can decode it for you.

[Wayne M.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

Many in the '69 to '71 period were purchased over-the-counter. Here is one that I have, 19th April 1971. "661" case [note the LISLE magnetic drain plug(s)].

In this instance, there is no VIN derivative, but there is the service unit coding CT1 [Chevrolet transmission, I believe], and above the "C" you can see (barely) '43265' which is the sequential assembly # for the service units.

Gotta shut down and switch computers to be able to resize the jpeg --- back soon

OK; I'm back with pic attachment --- what a PITA

[Joe L.]

Re: 1970 M22 Muncie Anyway to tell what car it is from?

I've had the transmission around for years and was just wondering what car it may have came out of.

Dave

Dave-----


Yes, as a point of curiosity it's always interesting to know where a used part originally "resided". From a functional and configurational standpoint, though, there is absolutely no difference between a Corvette Muncie and a Muncie installed in just about any GM car of the same year or year range.