Transmission Case INSPECTION OF TRANSMISSION CASE INSPECT TRANSMISSION CASE BUSHING Using a cylinder gauge, measure the inside diameter of the transmission case rear bushing. Maximum inside diameter: 38.19 mm (1.5035 in.) If the inside diameter is greater than the maximum, replace the transmission case. Extension Housing INSPECTION OF EXTENSION HOUSING 1. INSPECT EXTENSION HOUSING BUSHING Using a cylinder gauge, measure the inside diameter of the extension housing bushing. Maximum inside diameter: 40.09 mm (1.5783 in.) If the inside diameter is greater than the maximum, replace the extension housing. 2. IF NECESSARY, REPLACE OIL SEAL (a) Using SST, remove the oil seal. SST 09308-00010 or 09308-10010 with output shaft installed (b) Using SST, drive in a new oil seal as far as it will go. SST 09325-40010 (c) Coat the oil seal lip with MP grease.