65 M 20

[Donald S.]

can some one help me with the assembly code please it reads P 09 12 im thinking 9 th month 12 day but what is the P for thanks

[Rich Puleo]

Re: 65 M 20

P is muncie.
Rich

[Donald T.]

Re: 65 M 20

September 12 Muncie is correct. Assuming it is a 325 case, it would be for model year 64 or 65. So it could be 9/12/63 or 9/12/64. If the date code is located by the front cover is will be for model year 64. If it is located along the vertical rear flange, it will be for a 65.

[Wayne M.]

and probably stamp surface looks like this

Looks like a circular router was used to provide a flat surface. This appears to have started at SOP Muncie transmissions for '65 MY, when they switched from driver side cover lower rear corner ('63-64) to passenger side, as part of P-o-P introduction. Earliest I have noted is P0806 (August 6th). I haven't seen any later that Sept 16th, so far. At that point, they probably figured the grinding was unnecessary.

BTW; P designates Muncie 4-speed for PASSENGER CARS. There were other Muncies: M = 3-speed truck; N = 4-speed truck.

[Donald S.]

Re: stamp surface looks like this

stamping looks like this

[Donald S.]

Re: stamp surface looks like this

sorry here it is

[Wayne M.]

Looks like a Muncie assembled 12th Sept 1963

for a 1964 model year car. Any VIN stamping on this trans case ?

[Wayne M.]

Also, on RH side, does it say 'PAT.PEND' ..

... under the top line part # 3851325 ? If so, it's confirmation of an early 1964 model year.