The Sonnax High Clutch Drum Spring Retainer, Part No. 28755‑02, is a precision-engineered component designed specifically for the GM Powerglide transmission. Crafted from high-strength aluminum, this spring retainer provides superior durability and weight reduction compared to stock steel versions. It securely houses the high‑clutch return springs, ensuring consistent compression and engagement for optimal clutch performance, while enduring the rigors of racing and heavy-duty applications.

Whether used in factory-style rebuilds or upgraded 10‑clutch drum assemblies, this retainer is tested to Sae and OE standards and integrates seamlessly with related Sonnax components, such as the 10‑clutch drum kit (28756‑01K).

Offering reliable spring retention under high RPM and harsh driving conditions, the 28755‑02 ensures dependable clutch release and enhances overall Powerglide transmission performance.