WenmarOpen by Wenmar Pro

Service bulletin TT7252EN

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 id10155485
Published by NHTSA2019-04-01
Manufacturer's numberTT7252EN
Manufacturer's date2012-08-22
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN

NHTSA's summary

Tech Tip concerning Transmission Control Module (TCM) Recalibration for Kenworth and Peterbilt

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

Vehicles listed
ALLISON 2000 SERIES TRANSMISSION
KENWORTH T3002010
PETERBILT 3302010
PETERBILT 3352010
PETERBILT 3372010
PETERBILT 3402010

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

Other bulletins for the same vehicles and component
13-0492019-03-18. Service bulletin. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
SB-E-0432012-01-07. Service bulletin. PETERBILT TRUCK: SOFTWARE UPDATE FOR ENGINE CONTROL UNIT (ECU) AND AFTERTREATMENT CONTROL UNIT IS AVAILABLE FOR CERTAIN VEHICLES THAT ARE ELIGIBLE. *PE
RN-810-12011-01-06. Service bulletin. PETERBUILT SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN VEHICLES BUILT BETWEEN 12/4/09-8/17/10 WERE MANUFACTURED WITH DEFECTIVE INTRUMENTATION SOFTWARE. THE SOFTWARE DEFECT MAY INTERMITTENTLY RESULT IN AN ODOMETER THAT DOES NOT ADVANCE WHILE THE VEHICLE TRAVELS. NEW SOFTWARE WILL BE INSTALLED TO CORRECT THIS CONDITION. NO MODELS WERE LISTED. CSC LETTER WAS RECEIVED. *PE
TIB-E-0102011-01-05. Service bulletin. KENWORTH SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. PACCAR PX-6 AND PX- 8 ENGINE SOFTWARE AND AFTERTREATMENT UPDATES. THE IDENTIFIED CHASSIS REQUIRE A PRODUCT IMPROVEMENT INVOLVING RECALIBRATION OF THE ENGINE CONTROL MODULE (ECM) AND THE AFTERTREATMENT DIESEL EXHAUST FLUID (DEF) CONTROLLER. SOME VEHICLES REPAIRS MAY ALSO INCLUDE REPLACING VARIOUS AFTERTREATMENT SYSTEM COMPONENTS. CSC LETTER HAS BEEN RECEIVED. *PE