A sticking lockup relay control sleeve prevents TCC apply or release. Sleeve wear reduces converter pressure, overheating the fluid, and results in bushing and solenoid failure.
The tightly toleranced, drop-in replacement Sonnax valve and sleeve assembly restores proper hydraulic clearances, and uses upgraded materials to prevent wear.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
December 22, 2014
Topics: Diagnostics And Theory Shop Practices Rebuilding Tips Vacuum Testing Transmission GM Aisin AW 4L60-E Transmission 55-50SN TransmissionRead Now
Contact a Sonnax Parts Distributor.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.