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Service bulletin 3720

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 id10019440
Published by NHTSA2006-03-15
Manufacturer's number3720
NHTSA componentPOWER TRAIN:AXLE ASSEMBLY

NHTSA's summary

RULES OF THUMB AMERICAN AXLE MANUFACTURING GENERAL INFORMATION. 1997 - 2007 LIGHT DUTY TRUCKS AND UTILITIES. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Axle

Vehicles listed
UNKNOWN UNKNOWN

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