rotational force between the wheels and the transmission. The transfer should be seamless. Carefully greased and packed CV- (continuous velocity) and U-joints keep a great deal of abrasive dirt and grime from penetrating the joints and causing catastrophic wear. When the protective casings, or boots, are cracked or otherwise damaged, the grease that normally lubricates the joints acts like a sponge for dirt coming up from the road. Many people find out they've got a cracked or torn boot when performing routine maintenance. Left unchecked and un-repaired the situation will quickly escalate and cause a grinding noise that occurs each time you turn the wheel. The longer that noise continues, the worse the damage will be. You'll need a replacement Chrysler axle assembly. Many people attempt to replace the boot alone or the individual joint assemblies, rarely with satisfactory results. Once exposed to air and abrasion, the joints very quickly deteriorate and are unusable, even before you hear the characteristic grinding noise that gets louder as you turn the wheel. Unless you know a mechanic that specializes in joint replacement, you'll spend as much or more in labor to save a few dollars on the price of parts even if you have the special tools to crack open the boot. When you purchase a Chrysler axle assembly you can be assured of well lubricated, new parts, built to OEM specifications. Eliminate the possibility of spending more on labor than on the part to install a damaged joint into a boot that isn't tight. Why do the job more than once?