Transfer Case - Revised Shift Procedures

90ford25 Article No. 90-18-10
^ ELECTRONIC SHIFT MODULE (4X4) - MODIFIED OPERATION

^ TRANSFER CASE - 4X4 ELECTRONIC SHIFT MODULE - REVISED OPERATION PROCEDURE
LIGHT TRUCK: 1986-90 BRONCO II

1986-91 BRONCO, RANGER 1991 EXPLORER


ISSUE: The shift procedures into and out of LOW RANGE are revised for Ranger, Bronco and Explorer trucks built after 8/1/90 due to module changes. The new module will also be used to service prior model year trucks.

ACTION: If service is required on models built prior to 8/1/90, advise the customers of the following changes made to their vehicles.
Operation of the 1991 modules have been changed as follows:

To shift into 4 LOW:
^ Truck must be in 4x4 HIGH by previously pressing the 4x4 switch
^ Truck must be stopped (condition A)
^ The clutch must be depressed or the automatic transmission must be in neutral (condition B)
^ Then press LOW RANGE switch
To shift out of 4 LOW:

^ Truck must be stopped (condition A)
^ The clutch must be depressed or the automatic transmission must be in neutral (condition B)
^ Then press the LOW RANGE switch to shift back into 4x4 HIGH

^ Press the 4x4 HIGH switch to shift into 2 HIGH if desired
Previously, the module would respond to the LOW RANGE input from any mode (2H, 4H, 4L). If conditions A and B above are not met, the module would respond by flashing the 4 LOW indicator and wait until conditions A and B are met before completing the shift into or out of LOW RANGE. If LOW RANGE was selected while in 2 HIGH mode, the module would shift to 4 HIGH before flashing the indicator.

PART NUMBER PART NAME CLASS

F1TZ-7E453-A 4X4 Electronic Shift Module B

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 508000