Sonnax offers heavy duty planetary rebuild kit 28922-01HDK, which includes several heavy duty components and all the parts needed to rebuild or refresh a 1.76-style planetary, including Sonnax 1.80 and 1.69 ratio carriers. This kit is a substantial upgrade for greater reliability, wear resistance and longer service life in the Powerglide planetary.

• Tabbed and Figure-8 thrust washers feature steel-backed bimetal for improved strength and a PTFE lining for high wear resistance
• Figure-8 thrust washers have a wider web for increased strength
• Rear sun gear thrust washer incorporates an enclosed thrust bearing within the thrust washer that eliminates compression and distortion of the standard thrust washer due to input shaft thrust loads
• Hardened retainer plate