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Service bulletin TEBE3939-00

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 id10089400
Published by NHTSA2017-01-24
Manufacturer's numberTEBE3939-00
Manufacturer's date2015-12-04
NHTSA componentPOWER TRAIN

NHTSA's summary

PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING A CHECK VALVE IN THE TRANSMISSION COOLING CIRCUIT ON CERTAIN CT660 TRUCKS EQUIPPED WITH CX31 TRANSMISSIONS - A UNIQUE SEQUENCE OF EVENTS MUST TAKE PLACE IN ORDER FOR A NUISANCE HESITATION TO BE EXPERIENCED. THE HESITATION GENERALLY OCCURS ON THE FIRST SHIFT AFTER THE TRUCK HAS BEEN SHUT OFF FOR A LONG PERIOD OF TIME. THE CT660 EQUIPPED WITH CX31 RANSMISSION HESITATES FOR UP TO TEN SECONDS WHEN SHIFTING FROM NEUTRAL TO 1ST GEAR ON START-UP DUE TO OIL DRAINAGE IN THE SYSTEM. CONDUCT REWORK PROCEDURE.

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

Vehicles listed
CATERPILLAR CT6602014 to 2017

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