80259
Service Bulletin/Repair Instructions
AN INCORRECT JAKE BRAKE HI/LO SWITCH AND RELATED WIRING MAY CAUSE THE TRANSMISSION TO NOT PRESELECT THE PROPER GEAR. *MR
Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
80259
AN INCORRECT JAKE BRAKE HI/LO SWITCH AND RELATED WIRING MAY CAUSE THE TRANSMISSION TO NOT PRESELECT THE PROPER GEAR. *MR
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.