F 250 4WD Super Duty V10-6.8L VIN S (2001)
If contamination (water, mud, etc.) is found in the hub cavity, look for the source. If it is due to system leaks other than the hub lock, they must be found
and repaired. Always replace the hub lock 0-ring before re-use.
TORSIONAL FAILURE
If a torsional failure (twisting fracture) of the hub lock is suspected or the internal gears are "shattered", the axle constant shaft may have been damaged
as well. Inspect the axle shaft carefully; if twisting has occurred at the base of the axle splines, it is difficult to see without removing the bearing
assembly.
RATCHETING
If a "ratcheting" noise is found especially over road bumps and potholes, suspect the needle bearing that supports the inboard end of the axle constant
shaft within the hub/bearing assembly. Eliminate this as a cause before servicing the hub lock. Wear at this bearing can set up vibration, which may be
heard as ratcheting, while a seized bearing can bind the shaft, forcing it to rotate in 4X2.
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 00-8-6
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 508000, 509000, 510000, 597997, 702000, 702100
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