A/T - 4R70W Delayed Engagement/No Forward Gears

Article No.
01-11-7

06/11/01

TRANSMISSION - 4R70W - NO FORWARD OR DELAYED ENGAGEMENT

FORD:
2001 ECONOLINE, EXPEDITION, F-150

ISSUE

Some vehicles equipped with a 4R70W automatic transmission exhibiting a no forward or a delayed engagement may have a damaged forward clutch. This may be caused by rapid, Drive (D) to Reverse (R) engagements before the automatic transmission fluid reaches a normal operating temperatures and by Powertrain Control Module (PCM) calibration causing a lack of Forward Clutch pressure and insufficient lubrication.

ACTION

Verify forward clutch failure. In order to prevent reoccurrence, the (PCM) should be reprogrammed to the latest level calibration as part of the forward clutch repair procedure. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

Follow normal diagnostic procedures and verify the condition.

1. If the condition is valid, first repair all diagnostic trouble codes (DTCs) that may be present

2. Then repair all internal transmission components as required.

3. Clear all DTCs and validate the repair.





4. Follow the procedures found in the Powertrain Control Emissions Diagnosis (PC/ED) Workshop Manual and reprogram the PCM to the latest level calibration. Refer to the PCM Calibration information chart.





Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 501000, 502000, 503000