Bronco Full Size V8-302 5.0L (1986)
Control Module: Technical Service Bulletins
Transfer Case - Revised Shift Procedures
Article No. 90-18-10
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ELECTRONIC SHIFT MODULE (4X4) - MODIFIED OPERATION
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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:
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Truck must be in 4x4 HIGH by previously pressing the 4x4 switch
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Truck must be stopped (condition A)
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The clutch must be depressed or the automatic transmission must be in neutral (condition B)
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Then press LOW RANGE switch
To shift out of 4 LOW:
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Truck must be stopped (condition A)
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The clutch must be depressed or the automatic transmission must be in neutral (condition B)
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Then press the LOW RANGE switch to shift back into 4x4 HIGH
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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
