DESCRIPTION
The rear wheel drive halfshaft system employs constant velocity (CV) joints at both its inboard (differential) and outboard (wheel) ends for vehicle operating smoothness. The CV joints are connected by an interconnecting shaft which is splined at both ends and retained in the inboard and outboard CV joints by circlips.
The inboard CV joint stub shaft is splined and held in the differential side gear by a circlip. The outboard CV joint stub shaft is pressed into the hub and secured with a free-spinning locknut. The CV joints are lube-for-life with a special CV joint grease and require no periodic lubrication. The CV joint boots, however, should be periodically inspected and replaced immediately when damage or grease leakage is evident. Continued operation would result in CV joint wear and noise due to contamination or loss of the CV joint grease.
Halfshaft removal from the differential is accomplished by applying a load to the back face of the inboard CV joint assembly to overcome the circlip. The outboard joint end must be pressed from the hub.
The inboard tripod CV joints can be disassembled and serviced. Other than the CV joint boot, the outboard CV joint is serviced only as an assembly with the shaft.
The primary purpose of the halfshaft is to transmit engine torque from the axle to the rear wheels. Additionally, the CV joints used must be capable of operating at varying angles and must provide a means of shaft length changes to allow for vertical suspension (wheel) and engine dynamic movement.
These requirements are satisfied by using CV joints at the inboard (differential) end and outboard (wheel) end of the halfshaft. A CV joint is a mechanism for transmitting uniform torque and rotary motion while operating through its angle range. The inboard CV joint is a "plunge"-type joint which provides for the required axial movement to affect shaft length changes. The outboard CV joint has a higher angle capability than the inboard CV joint to accommodate suspension travel.
The CV joints and halfshaft assemblies rotate at approximately one-third the speed of the driveshaft and do not contribute to rotational vibration disturbances.