84770 - 4T60E 4T65E, EXTENSION HOUSING, BUSHING TYPE, PONTIAC, BUICK. 84770 - 4T60E 4T65E, EXTENSION HOUSING, BUSHING TYPE, PONTIAC, BUICK. GOOD USED COMMON BRANDS FOR THIS PART INCLUDE: PONTIAC, BUICK, CHEVROLET, GMC, GEO, OLDSMOBILE, SATURN, VOLVO & CADILLAC. BE SURE TO CHECK FITMENT PRIOR TO PURCHASING.