Passenger Car Transmission Identification Number For "Service" Usage

The following system will be used to identify service transmission assemblies. This number system applies to domestically produced complete service transmission assemblies only. Transmission cases are no longer identified. Manufacturing plants will number each service assembly as it is produced. The first letter will designate the GM division which produced the unit - "C" (Chevrolet). The second letter will indicate the type of unit "T" (transmission). The number following the letter will designate the model year - "3" (1983). The last five digits specify the service replacement sequence number. The group of numbers to be used by Chevrolet Manufacturing plants are as follows:


PLANT SERIAL SEQUENCE

Chevrolet - Parma Transmission Plant 00001 to 14999

Chevrolet - Toledo Transmission Plant 15000 to 24999

Chevrolet - Muncie Transmission Plant 25000 to 44999

EXAMPLE: Number CT300175 designates Chevrolet transmission, year and 175th unit produced for service at Parma.

Upon completion of the serial sequence, the plant will reuse the above numbers using a letter prefix, such as A, B and C.

EXAMPLE: CT3A00175

Hydra-Matic Division 00001 to 99999

Hydra-Matic Division Transmissions will be numbered with the letter "H" regardless of the GM division using the transmission.

Buick Motor Division 00001 to 99999

Buick Motor Division produced transmissions will be numbered with the letter "B" regardless of the GM Division using the transmission.

1983 PASSENGER CAR TRANSMISSION PROGRAM SUMMARY:

1983 PASSENGER CAR TRANSMISSION PROGRAM SUMMARY