Some 2004-05 Lancer Ralliart and Sportback models (build date prior to Nov. 1, 2005, may produce a squealing or groaning sound from the rear brakes when backing up under light brake pedal application.
According to Mitsubishi, the noise is most pronounced when the brakes are cold, and is most likely due to the pad linings grabbing, then releasing, at the rotors. Installing new-design rear brake pads with a different friction compound, Part No. 4605A336, should eliminate the noise permanently.
"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].
Be on the lookout for Tire Business' new 5 Factory Fixes newsletter, publishing the first Friday of each month.