TRUCK TRANSMISSION PRODUCTION CODE EXPLANATION A Continued THM 400 475 TRANSMISSION I D NAMEPLATE REAR WHEEL DRIVE Julian Date PS 219 A Model Year 88 FSA 2025 85 1985 86 1986 87 1987 88 1988 etc Serial Number Model I LOCATION PASSENGER SIDE BY GOVERNOR COVER NEAR THE REAR OF THE TRANSMISSION THM 700 R4 TRANSMISSION IDENTIFICATION INFORMATION REAR WHEEL DRIVE Model Year 5 1985 6 1986 7 1987 Additional ident for A 8 1988 some 1988 models only Julian Date 9 1989 or Day of the Year ll THM 700 RH 6 YKJ M Y 00248949 267 A 1 lToledoI Model Shift Built Serial Numberl A B First Shift C H Second Shift LOCATION PASSENGER SIDE DIRECTLY ABOVE THE OIL PAN NEAR THE REAR OF THE TRANSMISSION 31991 GENERALMOTORSSERWCEPARTSOPERAUONS lTTRUCK 62G 1 91 4 5 4 000