Mountaineer 4WD V6-4.0L VIN E (1999)
Electronic Pressure Control Solenoid: All Technical Service Bulletins
A/T - 4R44E/5R55E Slipping/Delayed Shift/No Engagement
Article No.
99-16-10
08/09/99
TRANSMISSION - R44E OR 5R55E - SLIPPING SHIFT/DELAYED OR NO ENGAGEMENT
FORD:
1999 EXPLORER, RANGER
MERCURY:
1999 MOUNTAINEER
ISSUE
Slipping transmission shifts and/or delayed or no transmission engagements may occur on some vehicles. The Electronic Pressure Control (EPC)
solenoid may cause stress on the attaching bracket. This stress causes the bracket to break and the EPC solenoid to back out of its bore causing line
pressure to drop too low or fluctuate, allowing friction clutches to slip.
ACTION
Diagnose and inspect for damaged EPC attachment bracket, and replace the bracket and EPC solenoid with new bracket and revised EPC solenoid. Refer
to the following Service Procedure for details.
SERVICE PROCEDURE
1.
Perform normal diagnosis for this concern.
2.
Perform Line Pressure Tests as listed in the
1999 Explorer/Mountaineer, Ranger Workshop Manual.
3.
If pressures are low, perform Pinpoint Test for the EPC solenoid.
4.
Inspect the bracket that attaches the Torque Converter Clutch (TCC), Shift Solenoid B (SSB), Shift Solenoid D/Coast Clutch Solenoid
(SSD/CCS), and EPC solenoids to the main control for damage. If the bracket is damaged, replace both the bracket and solenoid.
