Re: Grinding noise front end - 2004 FX4 SCREW
Brakes are more common. A lot of times you'll hear different noises when using 4x4 vs 2wd. Electronically controlled transfer cases (knob on dash) are controlled by the TCCM, or transfer case control module. They have a service life of around 10 years depending on use. Some can last longer or burn out quicker of course.
If you haven't done a 4x4 service in the last 30K or three years I'd advise getting it done. Best way to do it is to remove the cover, and clean the magnet thoroughly with a clean dry cloth. If any larger pieces of metal are present, then you'll know to expect some axle trouble in the next while. No gaskets are required, but you can use them if you wish. RTV sealant does the job just fine on it's own.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!