Richmond 7020526B Super Street 5-Speed Transmission, GM 2.89

The Richmond 7020526B Super Street 5-Speed is a manual transmission for GM applications, built around a 2.89:1 first gear and a 0.77:1 overdrive fifth gear, with a torque capacity of 600 lb-ft. An aluminum case keeps weight down, and a billet front bearing retainer drawing on NASCAR practice backs up the gearset under hard use.

Why the overdrive ratio matters on the highway

A 0.77:1 fifth gear lowers engine RPM noticeably at highway speed compared with a non-overdrive transmission, helping fuel economy and keeping the drivetrain quieter on long drives without giving up the 2.89:1 first gear's launch performance. CNC-machined internals keep tolerances tight across that wide a ratio spread, and the aluminum case construction keeps total weight manageable for a swap into a lighter street car or a weekend racer.

Fitment and what ships with it

This transmission uses a 1.125-inch, 26-spline input shaft and a 1.375-inch, 32-spline output shaft, weighs about 106 lbs dry, and takes 2 quarts of 80W-90 GL-4 gear oil. A shifter assembly, reverse light switch, and wiring harness are included, but a bellhousing and slip yoke are not, so plan those as separate purchases.

What warranty comes with this transmission? A 1-year, 50,000-mile warranty backs this transmission against material and workmanship issues when it is installed and used correctly.