Service bulletin 21-058-15
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 | 10159908 |
| Published by NHTSA | 2019-05-20 |
| Manufacturer's number | 21-058-15 |
| Manufacturer's date | 2015-11-05 |
| NHTSA component | POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE |
NHTSA's summary
Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience the following: ? Whine coming from the transmission during gear change. ? Transmission lamp on the Instrument Panel Cluster (IPC) is illuminated. ? Harsh shifting during low speed driving. The following enhancements are included in this software update: ? Improved torque management during gear shifts. ? Better clutch thermal management to improve shift quality. ? Improved low speed driving behavior.
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, Software
| ALFA ROMEO 4C | 2014 to 2015 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.