The next step up from the Shift Improver Kit is the Transpak. It has all the features in the Shift Improver Kit plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 & Chrysler Torqueflite only). Most stock automatic transmissions won’t downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you’re in. With the B&M Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you’ve got a modified engine, and you want additional RPMs, or you’re towing a trailer or driving heavy loads downhill.

Application:

• 1973-1975 BUICK APOLLO
• 1971-1973 BUICK CENTURION Automatic Trans 3-Speed Trans THM400 Trans
• 1973-1977 BUICK CENTURY Automatic Trans 3-Speed Trans THM400 Trans
• 1973-1987 BUICK CENTURY
• 1965-1981 BUICK ELECTRA Automatic Trans 3-Speed Trans THM400 Trans
• 1966-1987 BUICK ELECTRA
• 1975-1976 BUICK ELECTRA Automatic Trans 3-Speed Trans THM375/M39 Trans
• 1978-1981 BUICK ELECTRA Automatic Trans 3-Speed Trans THM475/M40 Trans
• 1970-1981 BUICK ESTATE WAGON Automatic Trans 3-Speed Trans THM400 Trans
• 1975-1976 BUICK ESTATE WAGON Automatic Trans 3-Speed Trans THM375/M39 Trans
• 1978-1981 BUICK ESTATE WAGON Automatic Trans 3-Speed Trans THM475/M40 Trans
• 1982-1983 BUICK ESTATE WAGON