{"nhtsa_id":621735,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-01","date":"2001-05-11","document_id":"PI537","mfr_campaign":null,"replaces":"PI537","component":"SUSPENSION","mfr_system":null,"summary":"SUBJECT REGARDING TRANSVERSE TORQUE ROD REPLACEMENT ON MODEL CHASSIS EQUIPPED WITH HENDRICKSON HN SUSPENSION HAVING 18-1/2 INCH SADDLES. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/621735","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"DM","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"LE","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"MR","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"RD","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":[]}