Band Adjustment Screw Jam Nut

The Sonnax 28127 Band Adjustment Screw Jam Nut is a vital yet often overlooked component in GM Powerglide transmissions, engineered to provide secure and reliable band adjustment. Specifically designed for the OE-style band adjustment screw, this hardened steel jam nut maintains precise adjustment and eliminates the risk of screw rotation or loosening under load.

Crafted to Sonnax’s rigorous quality standards, the 28127 nut delivers an exact fit and dependable performance, making it ideal for both routine rebuilds and high-performance applications. Whether used alone or as part of Sonnax’s heavy-duty band adjustment screw kit, this jam nut ensures consistent band pressure, improves transmission durability, and contributes to clean, positive gear shifts throughout Powerglide assemblies.