Mitsubishi said that some 2006 3.7L Raider pickups may emit a chirping noise from the accessory drive belt.
According to the carmaker, the noise is most obvious when the vehicle is moving slowly with the steering wheel at full lock, and is most likely due to the drive belt slipping on the alternator pulley.
Installing a new-design alternator pulley with a built-in overrunning clutch, Part No. 05170529AA, should eliminate the chirping noise.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].