{"nhtsa_id":10089400,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-01-24","date":"2015-12-04","document_id":"TEBE3939-00","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"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.","document":null,"url":"https://open.wenmarpro.com/bulletins/10089400","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CATERPILLAR","model":"CT660","year_from":2014,"year_to":2017,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}