Identification
General Motors transmission have markings to identify;
- - Casting numbers on the case and extension housing.
- - Powerglide transmissions were cast with the word Powerglide along the body
- - Date Casting Codes
- - Assembly Date Code Stamping - can be stamped anywhere...
- - Chassis Vin Number stamping or "source serial number"- beginning in 1962
Prior to 1967, transmission ID numbers contained the plant prefix code, month and date of production (expressed numerically) and a shift code (D = Day, N = Night). From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below) and a shift code. The constants in decoding the trans ID number are the date the transmission was produced.
- Pre-67 Example: C213N - (C = Cleveland Powerglide, February 13, Night Shift)
- Post-67 Example: P9E03 - (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month)
The transmission identification number or source serial number (chassis vin) is usually located close to the transmission code. This number will contain a division identification number, the model year, and the assembly plant and production sequence (last 6 digits) of the vehicle identification number (VIN) stamped onto the transmission.
- Example: 19N500001
Read more about this topic: Powerglide