The end plugs at the kick downshift control, manual low, and throttle downshift control valves become loose. This allows solenoid feed oil to exhaust and drop below 40-45 psi, which prevents the shift valves from stroking fully. The Sonnax kit 37947-13K contains o-ringed end plugs for these three locations, which positively seal the circuit to prevent oil loss.
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 21, 2005
Topics: Transmission Ford 4R44E Transmission 4R55E Transmission 5R55E TransmissionRead Now
Contact a Sonnax Parts Distributor.