The transaxle supplies power to the wheels through a pair of Axle Shafts. Specifically, the inner end of each Axle Shaft is splined to the differential side gears and the outer ends, which are secured by a large nut, are splined to the front hubs. Each Axle Shaft assembly consists of a Axle Shaft connecting an inner constant velocity (CV) joint and an outer CV joint. The inner ends of the Axle Shaft assembly contain tripod joints that allow angular motion and axial motion. This enables the inner CV joints to slide in-and-out as the Axle Shaft moves in-synchronization with wheel motion. If a boot fails, these joints can be disassembled and cleaned. However, any damaged parts mean replacing the entire Axle Shaft assembly. The design of the outer CV joints uses a ball-and-cage design which allows angular movement only and not axial movement. If the outer boot becomes torn, the joint can be cleaned and repacked by a technician. The joint has the same replacement requirement as any other component of the CV joint system for components that are damaged or faulty. The boots must be regularly inspected for damage and leaking lubricant. If a CV joint boot is torn, it must be replaced immediately to prevent damage to the joint. Most boots are replaced with the Axle Shaft removed. Some auto parts stores carry a "split" type replacement boot that can be fitted without removal. Nevertheless, the Axle Shaft should be removed and the CV joint disassembled so that it can be more thoroughly cleaned to prevent wear. CV joints that are worn down or damaged may leak lubricant, make clicking noises when turning, clunk when you accelerate after coasting, and vibrate at highway speeds. Check for Wear. Grasp each axle separately and rotate it in both directions while holding the CV joint housings. Feel for play in the axles. If you feel some play, either the splines are worn or the CV joints are sloppy. Also check the axleshafts for cracks, dents, and distortion.