Some 2007-08 Jeep Compass and Patriot models with T-355 or BG6 manual transmissions may emit an annoying squeak when the clutch pedal is applied or released. Chrysler said the noise only occurs on vehicles built before Aug. 6, 2007, and is most likely due to the clutch return spring coils making contact with each other. Spraying the spring liberally with a special lithium-based grease, Part No. 04318066AB, should eliminate the condition.
Some 1999-2006 F-Super Duty pickup trucks and 2000-05 Excursion SUVs with diesel engines may exhibit a situation in which the vacuum pump runs continuously, or not at all. In the case of the latter, the climate control system may also default to the defrost mode, while the 4WD system may become inoperative.
Ford says al these symptoms are limited to trucks built prior to June 27, 2005, and are most likely due to a defective vacuum pump. Installing an improved vacuum pump, Part No. 6C3Z-2A451-BA, should eliminate further troubles. Before installing the new pump, check and, if necessary, repair any leaking or pinched vacuum lines.
Mitsubishi reports that some Galant and Eclipse models may produce a high-pitched ringing sound from the front of the car under light braking, at speeds between 5 and 35 mph. According to the Japanese carmaker, the problem afflicts 2001-03 V6 models, as well as 2002-03 four-cylinder models, all built prior to July 23, 2002. Resonance in the front brake caliper supports is the likely source of the noise. Installing new-design caliper supports, Part No. MN102821, on both sides of the vehicle should eliminate the noise in short order.
"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].