Download AXLE SHAFTS – FRONT 1991-92 DRIVE AXLES FWD Axle Shafts Axle shafts transfer power from transaxle to drive wheels. Axle shafts consist of a shaft and flexible Constant Velocity (CV) joint at each end. See Fig. 1 . Inner CV joint is splined to transaxle. Outer CV joint is splined to hub assembly and secured by wheel bearing lock nut. Inner CV joint is a plunging tripod joint. The plunging action allows for axle shaft length change as suspension Inner and outer CV joints are enclosed by a CV joint boot. The boot maintains lubrication in the joint and prevents contamination of CV lubricant. Boots must be replaced when leakage or cracks are present. The inner CV joint can be repaired without replacing assembly. The outer CV joint must be replaced as an assembly.