{"nhtsa_id":10083635,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-27","date":"2015-10-30","document_id":"FSB 722-004A","mfr_campaign":null,"replaces":null,"component":"SUSPENSION","mfr_system":null,"summary":"TWIN Y SUSPENSION, TRAILING BLADE, REPLACEMENT. SOME MACK CHU AND CXU TRUCKS BUILT 06/13/2013 THROUGH 09/25/2015 AND EQUIPPED WITH TWIN-Y SUSPENSION MAY REQUIRE REPLACEMENT OF THE TWIN-Y TRAILING BLADES WITH A MORE ROBUST DESIGN. THE NEW TWIN-Y TRAILING BLADES HAVE A NEW PROFILE WITH A STRONGER MATERIAL THICKNESS OF 7.0 MM (0.28 IN). ALL FOUR TRAILING BLADES WILL REQUIRE REPLACEMENT IN THIS REPAIR PROCEDURE.","document":null,"url":"https://open.wenmarpro.com/bulletins/10083635","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2014,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2014,"year_to":2016,"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":[]}