{"nhtsa_id":10089396,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-01-24","date":"2015-09-24","document_id":"TIBU8479-00","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"BOLTS FOR THE CONTROL VALVE MAY COME LOOSE ON CERTAIN CX31 ON-HIGHWAY TRANSMISSIONS IN THE CT660 ON-HIGHWAY TRUCKS - THE CT660 ON-HIGHWAY TRUCKS EQUIPPED WITH THE CX31 TRANSMISSION HAVE HAD THE 8T-4908 BOLTS LOOSEN FROM THE 371-0891 SEPARATOR PLATE . THE BOLT FAILURE RESULTS IN AN OIL LEAK SEEN AS A DUST ACCUMULATION ON THE PLATE SURFACE OR OIL SPOTS ON THE GROUND. REPLACE 12 EXISTING 8T-4224 HARD WASHERS AND 12 EXISTING 8T-7547 BOLTS WITH 12 NEW HARD WASHERS AND 12 NEW BOLTS.","document":null,"url":"https://open.wenmarpro.com/bulletins/10089396","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CATERPILLAR","model":"CATERPILLAR","year_from":null,"year_to":null,"match":"exact","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":[]}