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 Automatic Trans 3-Speed Trans THM350 Trans
• 1971-1973 BUICK CENTURION Automatic Trans 3-Speed Trans THM350 Trans
• 1973-1981 BUICK CENTURY Automatic Trans 3-Speed Trans THM350 Trans
• 1975-1975 BUICK CENTURY
• 1975-1980 BUICK ELECTRA Automatic Trans 3-Speed Trans THM350 Trans
• 1975-1980 BUICK ESTATE WAGON Automatic Trans 3-Speed Trans THM350 Trans
• 1970-1972 BUICK GS Automatic Trans 3-Speed Trans THM350 Trans
• 1971-1980 BUICK LESABRE Automatic Trans 3-Speed Trans THM350 Trans
• 1973-1981 BUICK REGAL Automatic Trans 3-Speed Trans THM350 Trans
• 1975-1978 BUICK RIVIERA Automatic Trans 3-Speed Trans THM350 Trans
• 1975-1975 BUICK SKYHAWK
• 1976-1980 BUICK SKYHAWK Automatic Trans 3-Speed Trans THM350 Trans