Retainer Boost spring 42RE, 46RE

Retainer Boost spring 42RE, 46RE Package Quantity: 5 The OE retainer in listed Chrysler applications is prone to cracking and breaking, which allows the boost valve and spring to fall out of position. That causes a leak of 4th gear and TCC oil pressure. Sonnax boost valve spring retainer 22990-01 eliminates this leakage by securely keeping the valve and spring in place, and is made from steel for greater durability than the OE retainer. Symptoms: Leakage of 4th & TCC oil pressure Slipping Cause: The U-shaped bracket at the top of valve body that retains the boost valve and spring breaks, allowing the spring and valve to fall out of position. Correction: The Sonnax replacement bracket resists cracking or breaking.