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Service bulletin 5955

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 id605263
Published by NHTSA1999-06-07
Manufacturer's number5955
Manufacturer's date1999-03-01
NHTSA componentPOWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

NHTSA's summary

SUBJECT REGARDING FRONT DIFFERENTIAL NOISE INVESTIGATION. *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, Differential

Vehicles listed
FORD F-1501997, 1998, 1999
FORD F-2501997, 1998, 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
125902000-11-15. Service bulletin. SOME 4X4 VEHICLES MAY EXHIBIT A MOAN NOISE FROM THE FRONT DIFFERENTIAL WHEN THE VEHICLE IS OPERATING IN 4X2 MODE AND GOES AWAY WHEN OPERATING IN 4X4 MODE. *TT
991431999-11-24. Service bulletin. SOME 4X4 VEHICLES BUILT WITH CENTER DISCONNECT FRONT AXLES MAY EXHIBIT A MOANING NOISE FROM THE FRONT DIFFERENTIAL WHILE OPERATING IN 4X2 MODE. *TT
9961391999-09-09. Service bulletin. CONCERNS WITH FRONT DIFFERENTIAL NOISE. *TT
9961131999-09-09. Service bulletin. EXPERIENCING FRONT DIFFERENTIAL NOISE. *TT