Service bulletin LTB00553NAS1
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10214090 |
| Published by NHTSA | 2022-06-13 |
| Manufacturer's number | LTB00553NAS1 |
| Manufacturer's date | 2013-09-05 |
| NHTSA component | EQUIPMENT; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
NHTSA's summary
Technical Bulletin: Transfer Case Noise
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Equipment and accessories, Transmission and driveline, Transfer case
| LAND ROVER RANGE ROVER | 2013 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| LTB00906NAS3 | 2017-06-13. Service bulletin. SITUATION: ON VEHICLES FITTED WITH THE TWIN SPEED TRANSFER CASE, A JUDDER MAY BE FELT FROM UNDERNEATH THE VEHICLE WHEN STEERING AT LOW VEHICLE SPEEDS, SUCH AS TURNING LEFT OR RIGHT AT AN INTERSECTION. |
|---|---|
| LTB00553NAS2 | 2017-06-09. Service bulletin. "SITUATION: A RUBBING/SCRAPING/DRONE-TYPE NOISE AND/OR A VIBRATION MAY APPEAR TO BE EVIDENT FROM THE FRONT LEFT-HAND CORNER OF THE VEHICLE. THE NOISE MAY ALSO BE DESCRIBED AS SIMILAR TO A BRAKE RUBBING OR WHEEL BEARING NOISE AND CAN BE VARIABLE FROM VEHICLE TO VEHICLE. THE ISSUE CAN OCCUR AT DIFFERENT SPEEDS/GEARS AND IN STEADY STATE DRIVING CONDITIONS UP TO 50/60MPH (80/100KM/H). THE NOISE IN MOST CASES IS MORE PROMINENT IN SECOND GEAR COAST DOWN, PARTICULARLY AROUND 12MPH (20KM/H). TO CONFIRM THE TRANSFER CASE IS THE ROOT CAUSE, THE NOISE CAN LISTENED TO USING A ‘CHASSIS EAR’ FIXED TO FRONT DIFFERENTIAL RIGHT-HAND MOUNT. CAUSE: THIS MAY BE CAUSED BY A CHORDAL VIBRATION OF THE TRANSFER CASE CHAIN ON COAST/OVERRUN." |
| SSM63897 | 2017-06-01. Service bulletin. "ISSUE: A NOISE WHICH CAN BE DESCRIBED AS A RUBBING/SCRAPPING/DRONE OR IN SOME CASES MAYBE REPORTED AS A VIBRATION IS FOUND TO BE EVIDENT FROM THE LEFT HAND FRONT CORNER OF THE VEHICLE. THE NOISE CAN ALSO BE DESCRIBED AS SIMILAR TO A BRAKE RUBBING OR WHEEL BEARING NOISE AND CAN BE VARIABLE FROM VEHICLE TO VEHICLE. THE ISSUE CAN OCCUR AT DIFFERENT SPEEDS/GEARS AND IN STEADY STATE DRIVING CONDITIONS UP TO 50/60MPH (80/100KM/H), HOWEVER THE NOISE IN MOST CASES IS MORE PROMINENT IN 2ND GEAR COAST DOWN PARTICULARLY AROUND 12MPH (20KM/H). TO CONFIRM, THE NOISE CAN LISTENED TO USING ‘CHASSIS EAR’ FIXED TO FRONT DIFFERENTIAL RH MOUNT. CAUSE: CHORDAL VIBRATION OF THE TRANSFER CASE CHAIN ON COAST/OVERRUN. FITMENT OF THE FRONT DIFFERENTIAL SUPPORT BRACKET MAY ELIMINATE THE NOISE WITHOUT THE NEED TO REPLACE THE COMPLETE TRANSFER BOX ASSEMBLY" |
| SSM67137 | 2017-05-26. Service bulletin. "ISSUE: A RUBBING/SCRAPING/DRONE-TYPE NOISE AND/OR A VIBRATION MAY APPEAR TO BE EVIDENT FROM THE FRONT LEFTHAND CORNER OF THE VEHICLE. CAUSE: THIS MAY BE CAUSED BY A CHORDAL VIBRATION OF THE TRANSFER CASE CHAIN ON COAST/OVERRUN." |
| LTB-00553 | 2013-12-04. Service bulletin. LAND ROVER: A NOISE, ON SOME VEHICLES, COMING FROM FRONT LEFT HAND CORNER, LIKE A RUBBING, SCRAPING, OR DRONE TYPE AND ALSO A VIBRATION, DUE TO TRANSFER CASE CHAIN ON COAST, OVERRUN BY CHORDAL VIBRATION. MODEL 2013 RANGE ROVER. *PE |