2017 Ram 2500 4X4, 6.7L Cummins/68RFE, 133,xxx miles.
DTC P0871....Overdrive Pressure Switch Rationality was the main complaint/concern.
Customer said it would go into limp mode & set the DTC after about 20-25 miles, I immediately thought Worn Solenoid Switch Valve or a Warped Channel Plate, But I did my due diligence & checked the wiring & the Solenoid Pack Connector for fluid intrusion. Connector had a lot of fluid present. Cleaned the connector & solenoid pack real well & took the truck for a test drive......
About 27 miles in.....Trans downshifted out of 6th into 4th & P0871 set.
Got back to the shop & found no fluid in the connector, So the decision was made to replace the entire Valve Body & Solenoid Pack with a Mopar unit.
Did a Quick Learn via my scan tool & took it on a 50 mile test drive, No DTC's & shifts good for a 68RFE.
Customer also wanted Shocks & Front Brake, Bilstein 4600's, Power Stop Rotors & Mopar Pads went on. This is my first shock job on a Coil Sprung Ram.....The rear shocks are kind of a pita.
Called the customer with a total & to tell him it's ready...Oh yeah, My rear windows don't work. This is where things got interesting....
Started checking voltages at the window switches, Nothing made sense, Unplugged the switches & was able to manipulate it witch my Power Probe & some Jumpers & the windows work just fine.
Took the switches apart & found nothing physically wrong with them......
Maybe I'm not seeing the issue with the switch? Recorded the part number off the switch to price them out, Gave the parts guy the VIN & then gave him the Switch P/N......Wrong switches.....The ones in the truck are for a earlier model (2010).
Looked at a 2010 diagram & sure enough....FCA jumbled the circuits around. But the connector remained the same
The more I looked at the truck.....The front & rear door panels don't match, The customer just bought the truck so he has no idea what happened. Could've been a theft recovery & put back together with mismatched parts??