September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
In ZF6HP19/26/32 (Gen. 1) and Ford 6R60, 6R80, 6R100 units, the variable force solenoids control clutch apply/release, torque converter clutch apply/release and line pressure. The solenoid pressure regulator valve ensures proper flow and pressure to the solenoids during hot conditions and low pressure. Low feed pressure at idle can create delayed engagement or wrong gear starts. This valve also limits the maximum pressure to all the solenoids. Excessive solenoid feed pressure can flood the solenoids, causing gear ratio codes, harsh up/downshifts and excessive line pressure.
Kit is NOT compatible with ZF6HP21/28/34 (Gen.2) units. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.
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.
September 30, 2005
Gregg Nader
June 29, 2016
Maura Stafford
January 14, 2014
March 23, 2016
Bob Warnke
January 21, 2013
June 22, 2016
October 08, 2020
Maura Stafford
November 11, 2020
August 15, 2022
Jim Dial
September 16, 2022
Jim Dial
January 25, 2023
Maura Stafford
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.