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Service bulletin 985080

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 id613210
Published by NHTSA2000-06-19
Manufacturer's number985080
Manufacturer's date1998-11-01
NHTSA componentPOWER TRAIN

NHTSA's summary

CERTAIN VEHICLES MAY EXHIBIT AN INOPERATIVE SPEEDOMETER AND DIAGNOSTIC TROUBLE CODE P1635 AFTER A PECM HAS BEEN REPLACED. *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

Trouble codes named

P1635

Vehicles listed
FORD EXPEDITION1999
FORD F-1501999
FORD F-2501999
FORD MUSTANG1999
LINCOLN NAVIGATOR1999

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
200522008-01-23. Service bulletin. 1999-2008 F250-F550 SUPER DUTY 4X4 WITH ELECTRONIC SHIFT TRANSFER CASE NOT ENGAGING 4X4. *NJ
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
042272005-04-18. Service bulletin. DRIVE AWAY SHUDDER OR VIBRATION. *EH
042172005-04-15. Service bulletin. GENERAL POWER TRAIN CONTROL MODULE (PCM) PROGRAMMING PROCEDURES. *TT
183762005-04-14. Service bulletin. A COLD WEATHER REVERSE ENGAGEMENT STALL. *TT
041852005-04-08. Service bulletin. FRONT HUBS NOT ENGAGING, NOT STAYING ENGAGED AND/OR UNLOCKING. *TT
041982004-12-07. Service bulletin. MANUAL TRANSMISSION HARD TO SHIFT INTO FIRST/REVERSE FROM A STOP. *TT