TRUCK TRANSMISSION PRODUCTION CODE EXPLANATION Continued 400 475 MODEL TURBO HYDRA MATIC TRANSMISSION A The production code number contains the model year vehicle application build date and transmission model The transmission model number and sequence number is stamped below the build date code on the identification label EXAMPLE 85 E M 368 MODEL YEAR VEHICLE APPLICATION BUILD DATE CODE 1 1985 The build date starts V see chart below with the date on which production started July 24 205th calendar day and continues with the Julian date until the end of production Model and sequence r number example A 85 CM 5223 MODEL YEAR SEQUENCE NUMBER 1985 VEHICLE APPLICATION VEHICLE A TRANS j CODE CODE ENGINE SERIES CF K30 292 L 6 400 CH K20 3O 350 4BBL 400 CM C30 292 305 350 400 CJ CSO 454 4BBL 400 CP SUB ClO 20 454 4BBL 400 CT C 30 Rent Unit 350 4BBL 400 CD C 30 454 V 8 S G 400 CW C 10 305 350 V 8 400 V EXAMPLE The transmission installed in the 25th 1985 truck produced at Flint will be stamped C9F 100025 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R 26 REV 1 88