RatioTek has introduced a new professional calibration kit for GM 10L80 and 10L90 10-speed transmissions. The kit (part numbers RT-10L80/L-PR and RT-10L80/L-PRX) fits model years 2020 and later with a manual valve.
According to the company, this kit fixes common complaints of neutraling out and bang downshifts, and provides quicker shifts and more torque capacity. It installs from the bottom without removing the transmission.
Vehicles covered include the Cadillac Escalade; Chevy Camaro; Chevy Suburban and K2500 Suburban; and Chevy Tahoe.