Nissan 39100-1AA0B Shaft Assy-Front Drive

The power is taken from the transaxle and the rear differential in the all wheel drive models through two axle shafts, on the one side of which are the splined side gears of the differential and the other is splined to the axle hub and fixed by a nut. The inner ends of the output shafts contain tripod type CVs having both angular freedoms and axial freedoms, while the outer ones are ball and cage type. Tracking of boots for tear and leakage of the lubricant is required because separated boots of the CV joint need to be replaced to avoid joint abrasion. CV joint wear and damage symptoms include lubricant leakage on the outside of boot lips, a clicking sound while turning, a clunk when accelerating from a stop and smoothest vibration while driving at high speeds. To inspect the wear of CV joints and axle shafts, just grab the axles and twist them by hands, holding the CV joints with your hands, try to listen or feel vibrations that would show you that the splines are worn or that the CV joints are loose while grabbing the axle shafts.

Starting with the front axle shafts, the front wheel lug nuts should be taken loose, and the vehicle lifted prior to placing it on jackstands, and the final step is to take off the wheel. Next, use a prybar between two wheel studs to remove a cotter pin, and the axle shaft/hub nut; Remove the bolt and nut of the wheel speed sensor from the steering knuckle as well as the brake hose from the suspension strut. Pull off both the brake caliper and disc; ensure that the caliper hangs in an appropriate place that will not hinder working. Remove the lower strut mounting bolts and the strut will no longer be attached to the steering knuckle; pull the axle shaft out from the spindle by hand, or you can use a soft-faced hammer or puller if you have to. Locate the under-vehicle splash shield, and then unbolt it to expose the transaxle; use a drain pan to collect the lubricant that may spill during the process. In case of left axle shaft one should be very careful and gently pull the inner CV joint from the transaxle and in case of right axle shaft on the 2WD car, then bolts of the bearing housing should be unscrewed before disconnecting the axle shaft from the transaxle. In AWD models, remove the right axle shaft from the link shaft possibly with the help of slide hammer. Replace a transaxle or transfer case axle shaft oil seal with a new one. For removal, reverse the process, making sure that the retaining ring is seated correctly to the left axle shaft, the retainer bolts to the right axle shaft are tightened then all fasteners are tightened. Once the wheel is fixed in place together with the lug nuts, drop the car and check on the transaxle level of oil. If it's rear axle shafts on an AWD, relax the rear wheel's lug nuts, lift the car, and then secure it before removing the wheel. Take out the cotter pin and the axle shaft/hub nut or bolt next, and then take out the rear wheel speed sensor and brake caliper and disc, suspending the caliper. Extract the axle shaft from the hub through prying with a soft-faced hammer or a puller, and then, take off the rear wheel hub and the bearing. Open the rear cover of the differential and pry the axle shaft off the rear differential and take it out of the vehicle. For installation reverse all the above removal procedures and be careful not to scrape the differential oil seal and all screws should be tightened.