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Service bulletin 18711

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 id10017859
Published by NHTSA2005-12-06
Manufacturer's number18711
Manufacturer's date2005-07-01
NHTSA componentPOWER TRAIN

NHTSA's summary

A CLUNK/THUMP NOISE FROM THE REAR WHEN THE TRANSMISSION IS ENGAGED OR SHIFTED, DURING A CHANGE IN VEHICLE DIRECTION OR ON ACCELERATION. *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 EXPEDITION2005, 2006
LINCOLN NAVIGATOR2005, 2006

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

Recalls for the same vehicles and component
05V5190002005-11-09. POWER TRAIN:AUTOMATIC TRANSMISSION
20053492005-11-08. Powertrain

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
SSM 519092023-10-04. Service bulletin. When performing any transmission fluid changes or topoffs involving MERCON SP, MERCON LV has replaced all versions of MERCON SP and can be used going forward. Mixing MERCON LV and MERCON SP in the same transmission is acceptable. After 30-Jun-2023, MERCON SP ATF will no longer be manufactured and will only be available until inventory depletes.
TSB 22-22192022-06-27. Service bulletin. Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 (non-Raptor) vehicles equipped with 4WD may exhibit grinding/clicking/ratcheting noise from the front wheel area. This may be due to partial engagement of the integrated wheel ends (IWE). To correct this condition, follow the Service Procedure to remove and cap the vacuum supply line or to reprogram the transfer case control module (TCCM) and replace any worn vacuum and/or IWE components.
TSB-09-19-122010-04-20. Service bulletin. FORD: SOME HYBRID VEHICLES MAY EXHIBIT AN INTERMITTENT RED TRIANGLE ON AND STOP SAFELY NOW MESSAGE DISPLAYED ON THE MESSAGE CENTER, ACCOMPANIED BY A SUDDEN RPM LOSS/NO START WITH A DIAGNOSTIC TROUBLE CODE (DTC) P1A0C. *PE
TSB-08-19-32009-05-21. Service bulletin. FORD: SOME VEHICLES MAY EXHIBIT OIL SEPARATION FROM THE INTERNAL LUBE FOUND IN THE UNITIZED CARTRIDGE SEAL. OIL SEPARATION APPEARS TO BE AND IS OFTEN MISDIAGNOSED, AS AN AXLE LUBE LEAK. *PE
198462007-09-26. Service bulletin. FAILED TCM PROGRAMMING *NJ
062272006-12-20. Service bulletin. UN-COMMANDED TCC APPLY ON THE 1-2 SHIFT CAUSING PERCEPTION OF HESITATION AND/OR LACK OF POWER DURING SHIFT. *KB
06232006-03-13. Service bulletin. FLOOR MOUNTED SHIFTER STUCK IN PARK. *TT
188152005-12-15. Service bulletin. A TINY CRACK, OR CRACKS, AROUND THE TRANSFER CASE DRAIN PLUG HOLE. *TT
051612005-12-08. Service bulletin. CLUNK/GRIND/THUMP NOISE FROM REAR OF VEHICLE WHEN TRANSMISSION IS SHIFTED - VEHICLES BUILT BEFORE 6/13/2005. *TT
056182005-12-07. Service bulletin. REAR AXLE NOISE REPAIR. *TT