For 1.76-style planetary

The Sonnax 8415B Tabbed Thrust Washer is a precision-crafted component designed for use in GM Powerglide transmissions with a 1.76-style planetary assembly. This tabbed washer is engineered to fit precisely, helping maintain proper gear alignment and endplay within high-value performance builds or regular rebuilds.

While standard tabbed washers can be prone to wear and distortion under heavy loads, the 8415B’s robust design helps ensure reliable operation, although Sonnax also offers a heavy-duty PTFE-lined variant (8415B-HD) for enhanced longevity and wear resistance.

By incorporating this tabbed thrust washer into your Powerglide rebuild, you secure planetary spacer positioning, reduce the risk of internal misalignment, and promote smoother, more durable transmission performance.