TSB 12-2-5 Front Hub Engagement
#1
TSB 12-2-5 Front Hub Engagement
This TSB affects 2011/12 F250's to F550's built before 2/6/2012
Issue: Some of these vehicles equiped with 4X4 may exhibit a lack of engagement of the 4X4, not staying engaged and/or unlocking in extreme cold temperatures below -18 degrees Celsius or 0 degrees Fahrenheit.
Service proceedure: change front axel jub seals, axel shaft snap rings, front knuckle seals, and replace the module (with or without electronic shift on the fly).
I experienced this issue recently and the dealer performed the work, however the problem has not been rectified. In fact, the temps lately have been just below freezing, and the ESOF won't work properly.
Back to the dealer she goes!
Sam
Issue: Some of these vehicles equiped with 4X4 may exhibit a lack of engagement of the 4X4, not staying engaged and/or unlocking in extreme cold temperatures below -18 degrees Celsius or 0 degrees Fahrenheit.
Service proceedure: change front axel jub seals, axel shaft snap rings, front knuckle seals, and replace the module (with or without electronic shift on the fly).
I experienced this issue recently and the dealer performed the work, however the problem has not been rectified. In fact, the temps lately have been just below freezing, and the ESOF won't work properly.
Back to the dealer she goes!
Sam
#4
Does this just affect the front hubs or does it also affect the transfer case? My truck was delivered with hubs that are either "automatic" or I can get out and twist the **** to a "lock" position. If I lock the hubs manually will that solve the symptom until the real problem can be addressed later - like when it's warmer?
Thanks!
Thanks!
#6
Locking the hubs manually should work. Not sure what driveability would be like with them always locked. I have read of guys who leave them locked all winter.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
#7
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#8
Locking the hubs manually should work. Not sure what driveability would be like with them always locked. I have read of guys who leave them locked all winter.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
#9
Locking the hubs manually should work. Not sure what driveability would be like with them always locked. I have read of guys who leave them locked all winter.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
In my experience from this mornings commute to work is that once the bus warm up the hubs will lock.
I started my 45 min drive to work today in -34 degrees celcius cold. Truck in 4wd but the hubs not locking and by time I got to work everything was normal.
Sam
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