Fulltext TSBs

Technical Service Bulletins

TSB
99-14-3
  • NOISE – “MOANING” FROM FRONT DIFFERENTIAL WHILE IN 2-WHEEL DRIVE – VEHICLES BUILT THROUGH 4/15/1999
  • AXLE – “MOANING” NOISE FROM FRONT DIFFERENTIAL WHILE IN 2-WHEEL DRIVE – VEHICLES BUILT THROUGH 4/15/1999
Publication Date: JUNE 29, 1999

FORD:
1997-1999 EXPEDITION, F-150, F-250 LD
LINCOLN:
1998-1999 NAVIGATOR

ISSUE:

Some 4X4 vehicles built with center disconnect front axles may exhibit a “moaning” noise from the front differential while operating in 4X2 mode. The noise goes away when operating in 4X4 mode. This may be caused by the front differential side gears.

ACTION:

Replace the front differential side gears with revised gears and replace the front differential pinion gears with revised gears. Refer to the following text for details.

For vehicles that exhibit a front differential moan in 4X2 mode that goes away in 4X4 mode, replace both front axle side gears and both front axle pinion gears. Replace any worn or damaged pinion thrust washers and side gear washers. Refer to Section 205-03 of the appropriate model/year Workshop Manual for removal and installation procedures.

PART NUMBERPART NAME
XL3Z-4236-AASide Gears (2 Per Box)
XL3Z-4215-AAPinion Gears (2 Per Box)
DOAZ-4230-BPinion Thrust Washer
C9OZ-4228-BSide Gear Washer

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATIONDESCRIPTIONTIME
991403AReplace Axle Side Gears And Pinion Gears1.4 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
423542

OASIS CODES:

509000, 597997, 702100


Copyright © 1999 Ford Motor Company