Service bulletin 21-026-15
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 | 10150549 |
| Published by NHTSA | 2018-12-10 |
| Manufacturer's number | 21-026-15 |
| Manufacturer's date | 2015-04-21 |
| NHTSA component | POWER TRAIN; ELECTRICAL SYSTEM |
NHTSA's summary
Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one or more of the following transmission related concerns. ? Less than desired shift response when towing or driving up steep hills in high ambient temperatures. ? Delayed shift when driving in 4WD Low. ? Vibration or resonance in the cabin on acceleration from a cruising speed.
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, Transmission and driveline
| JEEP WRANGLER | 2014, 2015 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
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