GM Automatic Transmission

TH350 - Turbo Hydramatic 350 - Turbo 350

The TH350 was first introduced in the 1968 Camaro as a lighter version of the TH-400. The TH-350 was allegedly based on a few previous transmissions, including the Powerglide and the Buick Super Turbine 300. The Turbo Hydramatic 350 was referred to by some as a three speed Powerglide. The TH-350 resembles the Powerglide in some regards, but uses a torque converter based on the TH-400.

Performance Automatic Racing Transmissions

The 350 in TH-350 refers to the amount of torque that the Turbo Hydramatic 350 was rated for. By 1984 the TH-350 was on its way out in favor of the new 700R4, a 4 speed automatic transmission.

Today, you can still find a following of GM muscle car and hot rod owners who build TH-350’s for street cruisers and drag racers. The TH-350 has been a staple in street/strip cars for its low price and the ability to build a solid platform to handle most backyard drag cars.