June 22, 2023
Easy TH400, 4L80-E Low/Reverse Band Checks at the Track
Presented by Sonnax
Rear band adjustment checks on drag racing GM TH400, 4L80-E vehicles are critical for keeping the transbrake consistent, but it's never been easy to do with OE and most aftermarket-style low/reverse servos. Watch this video to learn how the Sonnax externally adjustable low/reverse servo kit makes it easy for anyone, including racers, to check and adjust the rear band for improved reliability and consistent, predictable staging.
The unique Sonnax servo kit features a performance servo with an adjustment pin that extends through both the piston and cover. Extra seals and hardware also are included. Choose the kit that fits your application:
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