1964 Muncie 4-speed ID.

[Richard S.]

On the left side of the case under the general motors corp. name is a roman numeral 2 and straight over to the right from this is 10-4. What does this indicate?

Case-(3851325) (P 1110) Left side case has a circle with an 8 in it with 2 dots.

Thanks, Richard Settle

[William C.]

Re: 1964 Muncie 4-speed ID.

What vin number is on the case, if any? P= Muncie, 1110 is Nov 10 of 1963 if it is a '64 case. or same in '64 if it is a '65 version. The other numbers are likely casting date.

[John H.]

Re: 1964 Muncie 4-speed ID.

On the left side of the case under the general motors corp. name is a roman numeral 2 and straight over to the right from this is 10-4. What does this indicate?

Case-(3851325) (P 1110) Left side case has a circle with an 8 in it with 2 dots.

Thanks, Richard Settle

Richard -

The circle with the 8 and 2 dots signifies the second week of August. The other markings are foundry pattern identifiers.

[Wayne M.]

Re: 1964 Muncie 4-speed ID.

On the left side of the case under the general motors corp. name is a roman numeral 2 and straight over to the right from this is 10-4. What does this indicate?

Case-(3851325) (P 1110) Left side case has a circle with an 8 in it with 2 dots.

Thanks, Richard Settle

This pic might contain examples of what you are mentioning. The assembly date is P0813, stamped in a circular grind on the edge of the case (one of the earliest 1965 model year "325" cases out of Muncie IN) Notice the upside-own '7-4' under CORP casting. You can see the Roman numeral 'I' further left. Then there's 2 circles. A close-up of same case shows a '7' on top and a single dot below (all in the circle). Means case was cast 1st week (one dot) of 7th month of the year. Other circle is for revisions of design/manufacture.

I don't know what the Roman numeral, or the 7-4 means, but these were scratched into the sand mold. Also, the large number '5' you see is (I believe) the mold number.

As Bill C. has mentioned, a VIN (even if not Corvette) will complete the picture.

[Richard S.]

Re: 1964 Muncie 4-speed ID.

Appreciate the quick response on this. The VIN (# 138488) is located on the top left side of the case.

Thanks, Richard Settle

[William C.]

Re: 1964 Muncie 4-speed ID.

Not an original Corvette trans from the VIN. S/N too high.

[William C.]

Re: 1964 Muncie 4-speed ID.

One other item of interest, if it is out of the car, and still has the original (or a GM replacement) input shaft, the close ratio input hat a notch cut around the splines of the input shaft, where the wide ratio shaft had no notch cut. It's an easier way to determine close vs wide ratio configuration then counting the turns of the input and output shafts. Just remember some aftermarket close ratio shafts did not carry the notch feature.

[Richard S.]

Re: 1964 Muncie 4-speed ID.

This pic might contain examples of what you are mentioning. The assembly date is P0813, stamped in a circular grind on the edge of the case (one of the earliest 1965 model year "325" cases out of Muncie IN) Notice the upside-own '7-4' under CORP casting. You can see the Roman numeral 'I' further left. Then there's 2 circles. A close-up of same case shows a '7' on top and a single dot below (all in the circle). Means case was cast 1st week (one dot) of 7th month of the year. Other circle is for revisions of design/manufacture.

I don't know what the Roman numeral, or the 7-4 means, but these were scratched into the sand mold. Also, the large number '5' you see is (I believe) the mold number.

As Bill C. has mentioned, a VIN (even if not Corvette) will complete the picture.

Wayne, could you post a picture of the case to show the corvette VIN # on it?

[Wayne M.]

Re: 1964 Muncie 4-speed ID.

Wayne, could you post a picture of the case to show the corvette VIN # on it?

This picture was not from a Corvette, nor even a Chevrolet. It was a Pontiac "long tail". Nevertheless, the trannys were still assembled at Muncie IN., and the maincases and internal gearing (except for mainshaft) were identical.

From your VIN 138488 with a trans assembly date of November 10 (1964), I see only one possibiliy among all the 17 Chevrolet / BOP assembly plants, and that is that your trans was installed in a Chevrolet Passenger car, with final assembly at Janesville Wisconsin about December 3rd. Production at all other plants was nowhere near the 20,000 units/month of Janesville.

Was there a letter 'J' preceding the number by any chance (not all have the plant identifier letter, though).

In all of this discussion, I'm assuming that yours is a 1965 model year transmission with the P1110 stamped on the passenger side, as shown in my thumbnail. If stamped on the driver side, lower rear corner of the shifter cover, then it's a 1964 model year.

Also a possibility that the trans was installed in a car from another GM division, but I believe that Chevrolet was the major user of Muncie 4-speeds.

[Richard S.]

Re: 1964 Muncie 4-speed ID.

Does all 1964 corvette muncie 4-speed transmissions (case #3851325) have the muncie ID. (example-P1110) stamped on drivers side, lower rear corner of the shift cover?
Also is the cars serial number stamped on the case, drivers side, rear flange? Which car serial number combination is used, (4117742), (4S117742) or (S117742)

[Wayne M.]

Re: 1964 Muncie 4-speed ID.

Does all 1964 corvette muncie 4-speed transmissions (case #3851325) have the muncie ID. (example-P1110) stamped on drivers side, lower rear corner of the shift cover?
Also is the cars serial number stamped on the case, drivers side, rear flange? Which car serial number combination is used, (4117742), (4S117742) or (S117742)

Richard -- if we're talking 1964 model year here, here's 3 pics that should answer your questions. ie. #1 is yes; # 2 is 41xxxxx, and a question for you: does your '325' maincase have 'Patent Pending', instead of U.S. Patent # ?

Well, I thought I could post the pics; apparently the NCRS site is having problems; can't even upload puny 40 kilobyte jpegs (gives error message after LONG delay) -- will post them later.

Error message states: "attachment in progress (file name) can be deleted here".

[Wayne M.]

Re: 1964 Muncie 4-speed ID.

Richard -- here'a the 3 pics that I attempted to post before, and that Gary Chesnut has been so kind to re-format for me.

So, with fingers crossed, here goes .

P.S. seems to have worked with Gary C's reduced format mod's.

[Jim W.]

Re: 1964 Muncie 4-speed ID.

Richard -

The circle with the 8 and 2 dots signifies the second week of August. The other markings are foundry pattern identifiers.

John,

To clear things up a bit, if the 8 with two dots (2nd wk of Aug) is the casting date; then is the P1110 which is stamped on the flange the date that the tranny is matched up with the motor thus having the vin # stamped at the same time? In my case, the vin 41050xx which matches my motor has P1106 which preceeds the build date of Nov 14th My 64 also has the 8 and two dots.

[Richard S.]

Re: 1964 Muncie 4-speed ID.

Richard -- if we're talking 1964 model year here, here's 3 pics that should answer your questions. ie. #1 is yes; # 2 is 41xxxxx, and a question for you: does your '325' maincase have 'Patent Pending', instead of U.S. Patent # ?

Well, I thought I could post the pics; apparently the NCRS site is having problems; can't even upload puny 40 kilobyte jpegs (gives error message after LONG delay) -- will post them later.

Error message states: "attachment in progress (file name) can be deleted here".

Wayne, My "325" maincase has US PATENT NO 3088336

[Richard S.]

Re: 1964 Muncie 4-speed ID.

Richard -- here'a the 3 pics that I attempted to post before, and that Gary Chesnut has been so kind to re-format for me.

So, with fingers crossed, here goes .

P.S. seems to have worked with Gary C's reduced format mod's.

Wayne, Thanks for all the time and effort you put in to help me with my questions, Richard settle.