WenmarOpen by Wenmar Pro

Service bulletin 4631

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 id615169
Published by NHTSA2001-01-03
Manufacturer's number4631
Manufacturer's date1998-08-01
NHTSA componentPOWER TRAIN

NHTSA's summary

BRIEF INFORMATION ON VEHICLES EXHIBIT VIBRATION AT CRUISE OVER 50 MPH. *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

Vehicles listed
FORD EXPEDITION1997, 1998
FORD F-1501997, 1998
FORD F-2501997, 1998
LINCOLN NAVIGATOR1998

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

Recalls for the same vehicles and component
19971701997-10-08. Powertrain
97V1710001997-10-07. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)
97V1470001997-09-09. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
056182005-12-07. Service bulletin. REAR AXLE NOISE REPAIR. *TT
184662005-05-05. Service bulletin. AXLE WHINE HOWL. THIS INCLUDES 1997-05 FORD VEHICLES. *EH
042662005-04-29. Service bulletin. A DRIVELINE CLUNK OR BUMP WHEN STARTING FROM A STOP. *TT
0421072005-04-28. Service bulletin. GENERAL (PCM) POWER TRAIN CONTROL MODULE PROGRAMMING PROCEDURES. *TT
042172005-04-15. Service bulletin. GENERAL POWER TRAIN CONTROL MODULE (PCM) PROGRAMMING PROCEDURES. *TT
04162004-06-16. Service bulletin. DRIVELINE CLUNKING/GRUNTING NOISE OR SHUDDER SENSATION DURING LIGHT TO MODERATE ACCELREATION AND/OR BRAKING. *TT
031482003-10-29. Service bulletin. NEW TRANSMISSION COOLER FLUSHER - SERVICE TIPS. 2003 ESCORT AND SUPER DUTY F SERIES INCLUDED. *TT
158972002-12-06. Service bulletin. SUBJECT REGARDING DRIVELINE ANGLE-RELATED VIBRATION AT VARIOUS SPEEDS AND LOAD CONDITIONS. *TT
157492002-11-07. Service bulletin. SOME VEHICLES EQUIPPED WITH 4 WHEEL DRIVE MAY EXHIBIT A NOTCHY OR STICKING FEELING IN SLOW SPEED TURNS WITH NO EFFECT ON STEERING EFFORTS OR ASSIST WHILE IN THE AUTOMATIC 4X4 POSITION. *TT
121202002-04-16. Service bulletin. SOME VEHICLES WITH 4R700 TRANSMISSIONS BUILT FROM 4/16/98 THROUGH THE END OF THE 1998 MODEL YEAR MAY EXHIBIT A LEAK FROM THE VENT AREA OF THE TRANSMISSION. *TT