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Re: 4R44E Tran Slipping into Second Gear
Posted to Transmission Forum on 2/12/2024

It looks like the shift kit caused the EPC Boost Valve to leak...or something. EPC solenoid does the intermediate band actuation for 2nd gear, but the line pressure it opens up into the circuit is less than half of its line pressure based on the low vac test p... Login to read more.