Service bulletin 21-003-13
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 | 10188673 |
| Published by NHTSA | 2021-03-15 |
| Manufacturer's number | 21-003-13 |
| Manufacturer's date | 2013-05-11 |
| NHTSA component | EQUIPMENT; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); ELECTRICAL SYSTEM |
NHTSA's summary
Flash: Drivetrain Control Module (DCTM) - Transfer Case Operational Enhancements This bulletin involves flashing the Drivetrain Control Module (DCTM) Owners may indicate that they have experienced one or more of the following symptoms:A driveline bump is felt during acceleration at approximately 10 mph (16 kph).The SERV 4WD message appears and the vehicle shifts from 4WD to 2WD.Binding of the front driveline while turning on steep grades at speeds around 3 - 5 mph (5 - 8 kph).
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
Electrical system, Equipment and accessories, Transmission and driveline, Transfer case
| DODGE DURANGO | 2011, 2012, 2013 |
|---|---|
| JEEP GRAND CHEROKEE | 2011, 2012, 2013 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21-004-13 | 2021-03-15. Service bulletin. Flash: Drivetrain Control Module (DCTM) - Transfer Case Operational Enhancements This bulletin involves flashing the Drivetrain Control Module (DCTM) Owners may indicate that they have experienced one or more of the following symptoms: Moaning or groaning noise while coasting and/or during a very light acceleration around 5 to 8 mph (8 to 13 kph). The SERV 4WD message appears and the vehicle shifts from 4WD to 2WD. Binding of the front driveline while turning on steep grades at speeds around 3 to 5 mph (5 to 8 kph).Surge/Shudder at speeds greater than 50 mph (80 kph). |
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