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Service bulletin 985A50

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 id613021
Published by NHTSA2000-06-16
Manufacturer's number985A50
Manufacturer's date1998-03-18
NHTSA componentSERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP

NHTSA's summary

EXPERIENCING EXCESSIVE BRAKE PEDAL TRAVEL ACCOMPANIED BY REDUCED BRAKING EFFECTIVENESS WHEN THE VEHICLE IS OPERATED AT AN IDLE FOR EXTENDED PERIODS, IN HILLY TERRAIN, IN HIGH AMBIENT TEMPERATURES AND / OR WHEN THE VEHICLE IS LOCATED IN EXCESS OF ITS GROSS VEHCLE WEIGHT RATING (GVWR). *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

Brakes, Anti-lock brakes

Vehicles listed
FORD F SUPER DUTY1989, 1990, 1991, 1992, 1993, 1994, 1995

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
952121996-04-25. Service bulletin. THE USE OF PETROLEUM-BASED GREASE AS A LUBRICANT IN SERVICING DISC BRAKES IS NO LONGER ACCEPTABLE BECAUSE IT MAY BE INCOMPATIBLE WITH THE RUBBER MATERIAL USED IN THE DISC BRAKE SYSTEM. IF PETROLEUM-BASED GREASE IS USED TO LUBRICATE ANY PART OF THE DISC BRAKE SYSTEM, IT COULD CAUSE RUBBER PARTS TO SWELL IF LUBRICANT CONTACTS THE RUBBER MATERIAL.