The General Motors 700R4 and 4L60E transmissions have some key differences in their design. You can use those differences to ...

Imagine a late-model, high-tech automatic 4-speed trans with a lower first gear (3.06:1) than the obsolete 2-speed Powerslide, or even the 3-speed TH-350 or TH-400. Imagine the effect of a high-gear ...

Retro-fitting modern, overdrive transmissions into early musclecars is nothing new, and with the rapid raise in gas prices (only two dollars a gallon as this is being written) the trend is sure to ...

This 1972 Chevrolet Chevelle, a work-in-progress with a rebuilt 454 V8 and 700R4 transmission, features BMR suspension, 4.56 gears, and a blasted/coated frame, ideal for enthusiasts seeking a custom ...