GM’s Turbo 400 (top) and Gearstar’s 700-R4 are positioned side-by-side. As you can see, both sport similar dimensions. The Turbo 400 is actually lighter by 21 pounds.

1. The rich architecture of the Turbo-Hydramatic 400 transmission demonstrates why GM spent a lot of time developing this automatic to begin with.

$8 turbo 400 hop. For the price of the trans pan, valve body, and separator plate gaskets, the firmness and quickness of GM Turbo 400 upshifts and downshifts can be dramatically improved ...

When you think about classic Chevy muscle cars, ... This Chevelle SS came off the assembly line with the LS5 454 motor, a turbo 400 column-shifting transmission, Positraction, ...

Rust-free and factory-documented, this 1972 Chevy C10 Cheyenne offers classic style, ... paired with a Turbo 400 automatic transmission and a Positraction 3.73 rear gear, ...

When Chevy launched its Sonic hatchback and sedan with the 1.4-liter turbocharged four-cylinder engine last year, it made one potential marketing error: the car was only available with a six-speed ...

The rich architecture of the Turbo-Hydramatic 400 transmission demonstrates why GM spent a lot of time developing this automatic to begin with. The Turbo 400’s hard parts can withstand ...