![]() ![]() The TH400 was the foremost amongst General Motors’ three-speed transmissions that debuted in 1964, appearing under the hood of Cadillac. Read more: Can I Push Start an Automatic Car? What Are The Alternatives? GM TH400 (or ‘Turbo 400’) The TH400 was the foremost amongst General Motors’ three-speed transmissions. The THM350 found widespread application, especially in small-block V8 and V6 engines owing to the transmission’s solidness, versatility, and power. Almost all GM cars and trucks (rear-wheel-drive) produced from 1969 till 1984 carried the THM350. The THM350 is often called CBC 350 as GM’s Buick and Chevrolet divisions joined hands to develop the TH350. The GM THM350 became so popular that the transmission paved the way for launching a series of sophisticated automatic transmissions in due course. General Motors accomplished a high level of perfection in automatic transmission with the TH350. GM developed and promoted the three-speed automatic-shift transmission to replace the standardized two-speed transmission-Powerglide. The TH350 is a 3-speed transmission with a higher 1st gear ratio (2.52:1) and a provisional 2nd gear, facilitating enhanced initial momentum for drag racing and everyday driving. GM’s Buick and Chevrolet divisions designed the THM350 primarily for its Chevrolet trucks and cars (1969-1986), having small-block engines. The GMC Turbo Hydra-Matic 350, famous as “Turbo 350,” first appeared in 1969 to replace the GM’s two-speed Powerglide transmission. GM TH350 (or ‘Turbo 350’) The TH350 is a 3-speed transmission with a higher 1st gear ratio (2.52:1) and a provisional 2nd gear, facilitating enhanced initial momentum for drag racing and everyday driving. This article will compare and contrast four distinct GMC transmissions-TH350, TH400, 4L60E, and 700R4 based on standard performance specs. Though automatic transmission technology has hugely evolved since it was introduced about eighty years ago, the core design remains nearly the same. GMC pioneered the basic technology involving automatic transmission by embedding the original Hydramatic or Hydra-Matic transmission in the Oldsmobile launched in 1940. Ecklers even includes the hardware for the cross member to save you the $20 trip to the hardware store because you will find something there that you thought you "might" need for your lawn instead of your 1955, 1956 or 1957 Bel Air Convertible.General Motors Company set the ball rolling for modern-day automatic transmission for its automotive gasoline engines by introducing the 1940 Oldsmobile. Our tubular crossmember kit will do that too. Don't want an overdrive transmission and just want a more bulletproof TH350? No Problem. Rear Rubber Transmission Mount, column shift linkageĬhanging the antiquated transmission technology in your Tri-Five Chevy for a newer overdrive transmission like the TH700R4 has never been easier with a automatic conversion kit from Eckler's Classic Chevy. Same High Quality Parts We Sell Individually At A Great Price!.Custom Crossmember Made Exclusively For This Conversion.Allows Easy Conversion To An Updated TH350 Or TH700R4 Automatic Transmission.Best Quality Conversion Kit For Your 1955, 1956 Or 1957 Chevy Convertible. ![]()
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