Question 1

How to replace the right front drive axle shaft on 9.25-inch and 8.25-inch axles on Cadillac Escalade?

Accepted Answer

Adjustments on clutch gears for the 9.25-inch axles, if required after changing any part of the right front drive axle, must be made by a professional mechanic, the appropriate shim being on the front axle clutch gear. First, they have to unscrew the wheel lug nuts, lift the vehicle hing on jackstands, and then taken off the right front wheel. If equipped, take off the differential carrier splash shield and drain the lubricant from frontal differential. Remove the bolts on the shift motor actuator bracket and disconnect the electrical connector and the harness of the right AXLE SHAFT HOUSING. For 8.25-inch axles, always go ahead and take the power steering assist motor and the right front shock absorber. Loosen the 2 bolts located on the right drive axle next to the axle shaft flange above the outer CV joint and hang the axle using a wire so that it is out of the CV joint path. For 9.25-inch axles, take the front axle shift motor and the right stabilizer end link. The differential carrier has a tendency to cock when the axle tube is removed and to prevent this, jack the differential using a floor jack and place a block of wood on the differential. Take off the nuts holding the axle shaft to its support bracket as well as the bolts that fix axle shaft flange with the differential carrier. Remove the axle shaft 'O' ring using the brass punch and hammer by tapping it gently on the axle shaft and then disconnect the shaft from the differential case side gear, follow by pulling off the inner axle shaft assembly and the axle shaft from the vehicle. For 9.25-inch axles, remove the bearing and seal by taking the axle shaft to a qualified technician and for 8.25-inch axles and using special tool to pull the bearing from the clutch shaft replace the inner seal and bearing with a new one. For installment, new gasket has to be used to install inner axle shaft housing assembly and torque the bolts to the mentioned degree. Screw the axle shaft on the support bracket and fasten the nuts then take the necessary torque. To install inner axle shafts for 8.25-inch axles, the splines of the inner axle shaft have to be correlated with the splines on the differential side gear by turning on the inner axle shaft and then giving it a few taps with a mallet; the ring clip on the axle shaft should go into a groove in the differential case side gear. Place the axle shaft onto the inner flange and fasten the required bolts in the axle shaft flange and tourque them. With the proper lubricant fill the differential, installing the differential carrier splash shield, after that, install the wheel lug nuts, lower the vehicle and finally, torque the lug nuts to the proper torque as required and test the vehicle.

Question 2

How to remove the rear axle shaft on Cadillac Escalade?

Accepted Answer

Before pulling back the rear axle assembly, there is need to if the car you're dealing with comes with an electronic parking brake, there is need to release this parking brake tension. It is suggested to remove the rear wheel lug nuts, elevate the rear of the car and then support it on jack stands; block the front wheels to prevent the vehicle from rolling. The rear wheels should be taken off, and then a floor jack should be placed under the rear axle differential housing; it is preferable to employ two jacks, one for each side of the axle tube. Depend on your car model; you need to have the driveshaft removed, shock absorbers loose at its lower part, vent hose from the axle housing fitting will also be dismissed, stabilizer shaft end links will need to be detached to the frame, and the last step is the brake line bracket bolted. Disconnect the rear brake calipers from the car and leave the brake hoses connected and put the rear calipers somewhere nearby secure. Remove the backing plate nuts, then separate the parking brake cables from the backing plate brackets, together with the rear wheel speed sensors. For the leaf spring models, you need to first loosen and take off the spring U-bolt nuts with the spring plates-then operate the hydraulic jack under the differential in order to take out the rear axle assembly out. For coil spring models, the links for the electronic suspension control sensors must be unbolted from the trailing arms, the track bar must be detached from the rear axle, the stabilizer shall be unbolted, and the coil springs must be unbolted. Remove the upper and the lower trailing arm bolts and the nut then lower the jack from the differential to remove the rear axle assembly. For installation, reverse the removal steps, use a wrench to tighten the U joint clamp bolts in a star like pattern in a way that tighten them to the recommended torque tightening force tight all the suspension and brake fasteners to the indicated torque values. Last but not the least, fix the wheels and nuts and tuck in the car and then again tighten the nuts to the recommended torque.

Question 3

How to remove and install a semi-floating axle shaft on Cadillac Escalade?

Accepted Answer

To pull out the semi-floating axleshaft you need first to wrench off the lugnuts of the rear wheel, raise the car safely on jackstands and turn on the brake of the front wheels and unbolt the wheel and brake disc. Next, remove the rear wheel speed sensor and then, if the car is equipped with an 8.6 inch differential, you will need to drain the differential lubricant and, if possible, remove the bolt-in differential cover. This pinion shaft lock screw should then be withdrawn and depending on the requirements of the model, may extract the pinion shaft. For locking differentials, pull out the pinion shaft halfway to allow space in order to turn the differential in order to access the C-locks without disturbing the spider gears. Screw and nut on the outer flanged end of the axleshaft to push off the C-lock, while on locking differentials, use a screwdriver type to turn the C-lock. Slowly pull out the axleshaft and discuss the fact that it is recommended that oil seal be changed time that axleshaft is pulled out. This is done by engaging the axleshaft into the inner race of the housing where it interlocks with the differential side gear and installing the C-lock into position and then pulling out on the flange to lock it. Place the pinion shaft in its respective bore and ensure that it is parallel to the lock screw hole; place the lock screw with some non hardening blue thread locking compound and then tighten it. Replace the cover and tighten the bolts; add the lubricant to the differential and then replace the brake components and tighten all fasteners, lower the car and tighten the nuts tight. When servicing a full-floating axleshaft, release the pressure by removing the bolts holding the axleshaft flange to the hub, use a soft-face hammer to tap the flange so as to light the shaft, and use lockingpliers to hold the flange as you twist the shaft slightly to pull it out of the housing, taking care to place a drip pan beneath to collect the dripping lubricants. This is almost the opposite to removal, although the procedure should be similar, where the axleshaft is to be standing vertically in order to engage the splines as required, and where a new gasket should always be used on the flange before tightening the bolts, but make sure that the mating surfaces are clean before doing so.

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