4X4 not Engaging, Not Staying Engaged and/or Unlocking in Extreme Cold Temperatures – 2011-2012 Ford F-250, F-350, F-450, F-550

TSB 12-2-5	FRONT HUBS ENGAGEMENT IN EXTREME COLD TEMPERATURES BELOW -18 DEGREES CELSIUS OR 0 DEGREES FAHRENHEIT – BUILT ON OR BEFORE 2/6/2012
Publication Date: February 10, 2012

 

FORD:

2011-2012 F-250, F-350, F-450, F-550

 

ISSUE:

Some 2011-2012 F-Super Duty vehicles equipped with 4X4 and built on or before 2/6/2012 may exhibit a 4X4 not engaging, not staying engaged and/or unlocking in extreme cold temperatures below -18 degrees Celsius or 0 degrees Fahrenheit.

 

ACTION:

Follow the Service Procedure steps to correct the condition.

 

SERVICE PROCEDURE

This may be caused by a loss of vacuum between the front hub lock assembly and the front axle shaft seal assembly or the transfer case control module (TCCM) hardware.

1. Check the vehicle build date, refer to Workshop Manual (WSM), Section 100-01.
   1. If the vehicle was built on or before 4/11/2011 replace the TCCM. Refer to WSM, Section 308-07A. Proceed to Step 2.
   2. If the vehicle is built between 4/11/2011 and 2/6/2012, proceed to Step 2.
   3. If the vehicle is built after 2/6/2012 this article does not apply. Refer to WSM, Section 308-07A for normal diagnostics.
2. Replace both front axle shaft seals. Refer to WSM, Section 205-03.

 

PART NUMBER	PART NAME
5C3Z-1K106-AB	Front Axle Hub Seal Kit (2 req)
5C3Z-3K050-AA	Axle Shaft Snap Ring (2 req)
5C3Z-4A322-AA	Hub Assembly O-ring (2 req)
5C3Z-3254-A	Front Knuckle Seal (2 req)
BC3Z-7E453-AG	Module – With Electronic Shift-On-The Fly (ESOF) With Electronic Locking Differential (ELD)
BC3Z-7E453-CG	Module – Without ESOF Without ELD

 

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.

OPERATION	DESCRIPTION	TIME
120205A	2011-2012 F-Super Duty 4X4 SRW: Replace Both Front Axle Shaft Seals (Do Not Use With Any Other Labor Operations)	2.2 Hrs.
120205B	2011-2012 F-Super Duty 4X4 SRW: Replace The TCCM, And Both Front Axle Shaft Seals (Do Not Use With Any Other Labor Operations)	2.4 Hrs.
120205C	2011-2012 F-Super Duty 4X4 DRW: Replace Both Front Axle Shaft Seals (Do Not Use With Any Other Labor Operations)	2.8 Hrs.
120205D	2011-2012 F-Super Duty 4X4 DRW: Replace The TCCM, And Both Front Axle Shaft Seals (Do Not Use With Any Other Labor Operations)	3.0 Hrs.

 

DEALER CODING

BASIC PART NO.	CONDITION CODE
3254	63