Here's a How-To video of our TH400 Adjustable Servo. | M&MTransmission

Checking the rear band adjustment on drag racing GM TH400 and 4L80-E vehicles is critical for keeping the transbrake ready for proper launch, but it's never been easy to do with OE and most aftermarket-style low/reverse servos. Featuring a unique design, these two new externally adjustable low/reverse servo kits from #Sonnax make it quick and easy for anyone to control band maintenance for improved reliability and consistent, predictable staging. 🙌 Watch this video to learn everything you need