Is transmission control indicator lamp (TCIL; OD off-on LED/switch) blinking?
If so, we can get a Code; go to NAPA etc and ask for free scan; have them do both KOEO and KOER (make sure eng is still @ norm op temp)
E4OD Diagnostic Trouble Codes (DTCs) 3 digits & OBD II, Possible Causes & Repair Procedures for 96
) Shift Solenoid 1, Shift Solenoid 2 or Internal Transmission Components 1-2 shift error. Engine rpm drop not detected when 1-2 shift was commanded by powertrain control module
Output circuit check, generated only by electrical conditions.
Improper gear selection depending on failure mode and transmission range selector lever position. Refer to Shift Solenoid Operation Chart. Shift errors may also be due to other internal transmission concerns such as stuck valves or damaged friction material. May flash transmission control indicator lamp.
Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
Disconnect transmission solenoid body connector on the passenger side of the transmission.
Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.
"...Completely seat solenoid body connector into solenoid body assembly receptacle by pushing on the top of the connector. [b]An audible click indicates full contact. Verify connection by pulling on harness..."
Source: by SeattleFSB (Seattle FSB)
Check MLPS (also ref to by Ford as TRANSMISSION RANGE (TR) SENSOR)
Check to make sure Transmission Range (TR) sensor harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.