T21 The following system will be used to identify service transmission assemblies domestically produced This number system applies to 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 9 1979 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 SEOUENCE Tremec Ind Division of Clark Equipment 0001 to 9999 Chevrolet Parma Transmission Plant 00001 to 14999 Chevrolet Toledo Transmission Plant 15000 to 24999 Chevrolet Muncie Transmission Plant 25000 to 44999 I idyra Mal ic 400 00001 to 99999 Hydra Matic transmissions will be numbered with the letter H regardless of the GM division using the EXAMPLE Number CT900175 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 El or C to indicate late production transmission for example CTAQOOOO1 1979 TRUCK TRANSMISSION I IDENTIFICATION INFORMATION CK LIGHT DUTY G TRUCK 465444 R3 IMAN I 14000343 SXl1 IAN 465445 R4 MAN 14000344 SVIMANJ 476789 Z2IMAN 14000345 SZIMANJ 14000340 STlMAN I 14020807 MCIMANJ 14000341 SU MAN 8629711 GCMIAUTOJ 14000342 SWlMAN I 8640954 6TD AUTO 14020806 MB MAN 8640961 6TL AUTO 8629711 6CMlAUTO 8640962 6WJIAU T 0 8629713 6CJlAUTO i 8640963 GTN AUTO 8629714 6CPIAUTO l 8640968 6TWlAUTO I 8629716 6CZIAUTO l 8640969 GWKIAUTOJ 8629717 6CK AUTO 8640971 6TZlAUTO 8629719 6CFlAUTO I 8640974 6WCIAUTO I 8629720 6CGIAUTO I 8629721 6CHlAUTO P TRUCK 8629746 6CW AUTOJ 465444 FI3IMAN 8640955 6WHiAUTO 465446 R5IMAN 8640956 6TF AUTO 14000346 UBIMAN I 8640958 STHIAUTOJ 14020808 MD MAN 8640959 6 J AUTO 8629711 6CMIAUTO 8640960 6WS AUTO 8529713 6CJlAUTO I 8640970 6TY AUTO 8629723 6CLlAUTO I 8629712 GCT AUTOJ 8640957 6WT AUTO 8629747 6COIAUTO l 8640959 6TJlAUTO I j GEllERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK Emi t 42