Sonnax 59947-LPC LPC Accumulator Piston Kit for AW55-50SN Transmission

The Sonnax 59947-LPC LPC accumulator piston kit is designed to restore proper hydraulic function in AW55-50SN, AW55-51SN, AF23, AF33, and RE5F22A automatic transmissions. This comprehensive repair solution addresses common wear issues in transmission valve bodies that can lead to poor shift quality and converter apply problems.

Key Features:

• Provides positive seals on both ends of the piston to seal worn bores
• O-ring seals eliminate metal-to-metal contact between piston and bore, preventing sticking and wear
• Aluminum piston construction matches the expansion rate of aluminum valve bodies for optimal performance
• Prevents fluid leakage between the LPC piston and bore
• Restores proper line pressure control for smooth transmission operation

Kit Contents:

• Piston sleeve
• Small spring
• Large spring
• Two O-rings

This kit is commonly used in transmission rebuilds for vehicles from manufacturers including Volvo, Saab, Opel, Citroen, Saturn, and select Nissan models equipped with compatible transmissions. The Sonnax design eliminates the sticking issues that result from worn valve body bores, ensuring reliable long-term performance.