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Service bulletin 12797

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id607111
Published by NHTSA2001-01-05
Manufacturer's number12797
Manufacturer's date1999-05-01
NHTSA componentPOWER TRAIN:AXLE ASSEMBLY

NHTSA's summary

ADDRESSING CONCERNS OF A LOW SPEED (UNDER 35 MPH) CLICKING NOISE CAUSED BY A CAGE NUT ROCKING ON THE COTTER PIN FOR THE FRONT AXLE HALF SHAFT SPINDLE. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Axle

Vehicles listed
FORD EXPEDITION1997, 1998, 1999
LINCOLN NAVIGATOR1997
LINCOLN NAVIGATOR1998, 1999

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
056182005-12-07. Service bulletin. REAR AXLE NOISE REPAIR. *TT
46282001-01-02. Service bulletin. SOME VEHICLES MAY EXHIBIT REAR AXLE NOISE. *TT
137572000-06-12. Service bulletin. VEHICLES EQUIPPED WITH LIMITED SLIP/TRACTION-LOK REAR AXLES MAY EXHIBIT A CHATTER NOISE WHILE TURNING. *MJS
9830741999-09-21. Service bulletin. CONCERNS WITH AXLE WIND-UP AND / OR CLUNKING, POPPING, RATCHETING TYPE NOISES WHEN MAKING CORNERING MANEUVERS. *TT
129051999-09-08. Service bulletin. SOME VEHICLES MAY EXPERIENCE AXLE WIND UP AND / OR CLUNKING, POPPING, RATCHETING TYPE NOISES WHEN MAKING CORNERING MANEUVERS ON VEHICLES EQUIPPED WITH A FOUR WHEEL DRIVE HI OR LOW RANGE MODE. *TT
BC02549702011997-06-27. Service bulletin. 4X4 FRONT AXLE IS LEAKING THROUGH THE VENT TUBE. *JD
BC00659611011997-06-17. Service bulletin. 4X4 FRONT AXLE LEAKING THROUGH VENT TUBE. *TW
BC96749610011997-05-27. Service bulletin. LIGHT TO MODERATE AXLE NOISE (AXLE WHINE) AT 50 TO 65 MPH (80 TO 105 KPH) DURING ACCELS, DECELS OR CRUISE MAY BE DUE TO AXLE NOISE BEING TRANSMITTED FROM THE AXLE INTO THE VEHICLE. *TT