CORVETTE REAR DIFFERENTIAL CARRIER CODES 1984 3 07 RATIO HE3 OPT 3 31 RATIO GW4 OPT ACC ACB ACF ACK ACH ACR ACJ ACN ACS 4YJ 1985 2 73 RATIO GU2 OPT 2 87 RATIO HK1 OPT 5YN 5YY 3 07 RATIO GAA OPT 5YB 5YX 4 J wAHEHOU ING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION CHEVROLET l4Y REV 1 85 15