TRANSMISSION IDENTIFICATION CONT D INCLUDING AIKLEE RATIO TRANSMISSION O AE iSEE MBLY CODES Note Transmission identification can be located in one of three positions on the transmission A Identification plate on side of case B Stamping number on governor cover C Ink stamped on bell housing 1984 CONT D MV4 4 SPD A T M19 4 SPD MAN MYl 4 SPD MAN THM35OC I WS XN XS WC UB UF UN UM RB RC4 WW WA XX XA UC XC M75 5 SPD MAN M17 4 SPD MAN MB4 5 SPD MAN UH DS CR FRONT AXLE IDENTIFICATION 2 39 RATIO 2 53 RATIO 2 84 RATIO PW CE HS PD 3 32 RATIO 3 33 RATIO 3 65 RATIO UC UD CT UF UH DS 11985 MD8 4 SPD A T MV9 3 SPD A T MW9 4 SPD A T THMYOOR4 THM2OOC THM2004R OVERDRIVE YN Y6 YK YT OU CV HH 5C5 CH CR OM 5CY OS 5CO HL 5CG CQ HG MD9 3 SPD A T THM125C CE 2 53 RATIO CT 2 84 RATIO CX 3 18 RATIO HS 2 84 RATIO PD 2 84 RATIO PW 2 39 RATIO 1991 GENERAL MOTORS SERVICE PARTS OF ERATIONS CHEVROLET 17W 6 91 4 7 4 000