Swap Block TH400 Transmission Mock Up | GF-MUT-TH400

• Our patent-pending tab-and-slot version of the 10L90 Swap Block™ Transmission Mock Up Block provides accurate transmission mounting and yoke positions.
• This unique design is lightweight and comes disassembled for ease of shipping and storage.
• One tool accomplishes accurate placement of a TH400 transmission found in GM cars and trucks from 1964-1990.
• This mock up Transmission has a rear mount plate designed around the short tail TH400, but if a long tail is needed, you can bolt a tail shaft to the rearmost upright plate.
• Easily positioned by hand, there is no need to bench-press a heavy transmission into place for fitment and fabrication of Crossmember, etc.
• Save time and money and work more safely.
• Durable steel construction resists heat from welding, so unlike foam blocks, custom crossmembers can be fabricated close to the block.

The TH400 transmission is the heavy-duty version of a TH350. The TH400 was electronically controlled, which required a kickdown switch by the carb or gas pedal to tell the transmission when to kick down a gear. They are still being produced and used in heavy duty GM and military vehicles. Here’s a list from Gearstar.com of all the cars that used the TH400 transmission:

1965-1967, 327 V8 (Rambler/AMC)
1968-1971, 350 V8 (Buick)
1969-1972, 225 V6 (Buick)
1972-1975, 232 I6 (AMC)
1975-1979, 258 I6 (AMC)
1972-1979, 304 V8 (AMC)
1972-1979, 360 V8 (AMC)
1974-1975, 401 V8 (AMC)
GM
Jaguar
Ferrari
Rolls-Royce