The following is from the Ford TSP (Technical Service Publication):
Diagnostic Trouble Code (DTC) P0731/P0781 indicates gear #1 incorrect ratio. DTC P0732/P0782 indicates gear #2 incorrect ratio. DTC P0733/P0783 indicates gear #3 incorrect ratio. DTC P0734/P0784 indicates gear #4 incorrect ratio.
DTC P0750/P0751, P1751 indicates SS1 electrical malfunction. DTC P0755/P0756/P1756 indicates SS2 electrical malfunction. DTC P0760/P0761/P1761 indicates SS3 electrical malfunction.
Possible causes:
-- Internal Transmission.
-- Damaged solenoid.
-- Solenoid circuit open or shorted to VPWR or GND.
-- VPWR circuit open or shorted.
-- PCM damaged.
* Key off.
* Disconnect transmission vehicle harness connector. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
* Connect DVOM between the VPWR pin and the suspect solenoid pin at the transmission vehicle harness connector.
* Perform KOEO Self-Test.
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
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