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.








5. If the bracket is not damaged, inspect the solenoid for the affected date code (refer to the following Manufacturing Date Code Chart) and ID marking (Figure 1, Views 1, 2, and 3). If the solenoid is one of the affected, replace it.

6. Inspect the fluid pan for major contamination.

^ If contamination is minimal, clean the main control, but do not replace.

^ If major contamination is present, perform normal transmission overhaul as required, including main control replacement. Pay particular attention to the condition of the friction plates. Repair as required.

7. After repairs are completed, verify concern has been fixed.





Parts Block

OTHER APPLICABLE ARTICLES: NONE

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATION DESCRIPTION TIME

991610A Replace Electronic 1.2 Hrs.
Pressure Control (EPC)
Solenoid And Clean Main
Control (Includes Time For
Road Test) - 4R44E Or
5R55E

991610B For Line Pressure And
Pinpoint Tests, Use "A"
Time As Outlined In The
Warranty And Policy
Manual

DEALER CODING
CONDITION
BASIC PART NO. CODE
7G383 01

OASIS CODES: 501000, 502000, 503000