January 10, 2022
Wear can occur in Chrysler 948TE, Honda/Acura, 9-speed and ZF9HP48 units in the pressure regulator bores. This wear allows critical oil loss and prevents proper line pressure regulation. Incorrect pressure regulation can result in instability, cooler and lube flow restrictions, bad shifts and damaged clutches. Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 85740-15K restores correct pressure regulation.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.