Front axle problems

36mm

2002 Chevrolet Suburban 1500 - Spindle And Axle Nuts

O'Reilly Auto Parts https://www.oreillyauto.com > cv--driveshaft---axle
Thread Size: M24-2.0 ; Hex Size (mm): 36mm.

Torque

https://www.google.com/search?q=2002+Chevy+Suburban+Z71.+axle+nut+torque

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Your vehicle had option of two different 4x4 systems ,
New Venture Gear 263 Selectable Two Speed Transfer Case
The NVG 263 transfer case features a three button shift control switch located on the instrument panel. When the vehicle has the ignition key in the RUN position, the transfer case shift control module starts monitoring the transfer case shift control switch to determine if the driver desires a new mode/gear position. At a single press of the transfer case shift control switch, the lamp of the new desired position will begin flashing to inform the driver that the transfer case shift control module has received the request for a new mode/gear position. The lamp will continue to flash until all shifting criteria has been met and the new mode/gear position has been reached (or has been engaged). Once the new mode/gear position is fully active, the switch indicator lamp for the new position will remain ON constantly.
The NVG 263 transfer case provides the driver with 3 manual mode/gear positions:
• 2HI - 2 Wheel Drive high range
• 4HI - 4 Wheel Drive high range
• 4LO - 4 Wheel Drive low range
OR
The NVG 236/246 transfer case features a 4 button shift control switch located on the instrument panel. When the vehicle has the ignition key in the RUN position, the transfer case shift control module starts monitoring the transfer case shift control switch to determine if the driver desires a new mode/gear position. At a single press of the transfer case shift control switch, the lamp of the new desired position will begin flashing to inform the driver that the transfer case shift control module has received the request for a new mode/gear position. The lamp will continue to flash until all shifting criteria has been met and the new mode/gear position has been reached, or has been engaged. Once the new mode/gear position is fully active, the switch indicator lamp for the new position will remain ON constantly.
If there are problems with electronic part of the systems the shift control switch light will flash warning of a problem , If no lights you have a mechanical problem in the transfer case itself .
The front axle control circuit consists of an electric motor actuator which engages and disengages the front axle. The front axle actuator motor consists of a Permanent Magnetic (PM) motor, a worm gear controlled plunger, a front axle switch and an electronic control circuit all within the actuator assembly.
The front axle actuator has four circuits connected to it, a front axle feed circuit, front axle ground circuit, front axle control circuit and a front axle switch circuit.
Whenever a shift to AUTO 4WD, 4HI, or 4LO is requested, the transfer case shift control module engages the front axle by grounding the front axle control circuit through a current limiting driver. Test Description
The numbers below refer to the step numbers on the diagnostic table.
Tests the electrical function of the front axle actuator. Helps determine between mechanical and electrical malfunctions.
Tests for proper power and ground at the front axle actuator.
Tests the operation of the front axle control circuit.
Helps determine if the transfer case shift control module is able to monitor the front axle switch.
Tests the front axle switch circuit for an open or high resistance.
Measures the voltage between the front axle feed circuit and ground.
Tests the front axle control circuit for an open or high resistance.
Inspects the front axle for a mechanical malfunction.
Tests for open in the front axle feed circuit.

How to Replace a CV Axle on a Ford Escape / Mazda ...

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https://www.youtube.com/watch?v=_JxagNLBlQ4
Aug 29, 2013 - Uploaded by klowny1969
Axle nut should be torqued to spec..in the ford escape its around 205-220 lbs ft How To Change An Axle On A Front Wheel Drive Car ! SUBSCRIBE ! ... How to Replace a Front Axle Half Shaft - Duration: 14:37. ... Alternator replacement 2005 2006 Ford Escape 3.0L DOHC All Wheel Drive - Duration: 13:15.

Front axle replacement Ford Escape 2003 Right front CV ...

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https://www.youtube.com/watch?v=JQK8SPj6Qsk
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Front axle replacement Ford Escape 2003 Right front CV axle install remove replace This Channel provides ...

the axle could be bent or damaged, the differential housing could be damaged, could be wrong bearing. you don`t say if this is a rear wheel drive you have or just a front wheel drive. there are front wheel drive bearings that have problems even new, because of manufacturing problems or inferior materials. try a different manufacture for a bearing.

to remove front axle.to loosen front axle nut leave vechicle weight on wheel then just loosen front axle nut because axle nut torque at 217 ft lbs torquehard to loose axle nut with vechicle weight off wheel.okay. you need a 1/2 breaker bar and axle socket to loosen axle nut dont use 12 points sockets need go auto parts store buy right socket for axle nut.okay when you loosen front axle nut you need safely raise support vechicle. need to remove wheels remove fender apron seal remove transaxle fluid remove transfercase oil if you have 4WD.remove hub nut remove stabilizer bar link remove speed sensor remove tie rod end remove lower arm from the ball joint then slide the halfshaft from the hub then carefully pry the shaft from the transaxle.then install new front axle push in make sure front axle snap ring on front axle snap in place inside transmission just pull a little on front axle make its in place. when all done tighten front axle much as you can then when done putting every thing back in place.lower vechicle need torque front axle nut to 217 ft lbs.

sounds like you have automatic front hubs and they are not engaging hard to tell w/o vehicle specs

2002 chevy s10 4 door 4x4 4 wheel drive wont engage

Is the system ESOF ( Electronic Shift On the Fly ) or MSOF ( Mechanical Shift On the Fly ) ?

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

I would suspect that the front drive shaft does not turn, and the issue is with the vacuum lines for the front axle.

You can check the vacuum lines with the engine running, and have a vacuum gauge on the front disconnect motor. Pink line is 2WD operation ( unlocks the front axle ) Light Blue is the 4WD operation ( locks the axle ).

The disconnect motor is on the front axle, item #10 in the picture below


Picture of it.

lift front axle and place on jack stands. place front axle on 4x4 and rotate wheels by hand. If front axles are harder to turn than normal then remove drive shaft from transfer case and rotate front axle once more. this will let you know if the problem is in the front axle or in the tranfer case

3 bolts from the back, axle nut and take the caliper off pretty easy.