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Service bulletin 14-04-20-001

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 id10137920
Published by NHTSA2018-05-21
Manufacturer's number14-04-20-001
Manufacturer's date2014-05-19
NHTSA componentPOWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

This information bulletin provides a procedure to add a friction modifier to the rear differntial in the customers concern is a moan from the rear diff during slow and tight maneuvers.

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, Differential

Vehicles listed
CHEVROLET CAMARO2014

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