We have a 2003 Chevrolet Suburban that has AWD and the Stabilitrak system and 175k miles.
We get the occasional traction control warning when leaving stop signs, etc, turning traction control off makes that go away. Suspected wheel speed sensor that needs to be changed.
It developed a shake under power, doesn't happen when it is first started but after 10-15 miles. Felt like a CV joint or U joint.
It has the Borg-Warner AWD Transfer case. Fluid is within 1/8in of full at the fill hole, fluid is clean.
It is currently on jack stands with all four corners in the air. The transfer case is supposed to split power constantly at 40/60 f/r.
When I put it in drive or reverse the rear wheels turn, fronts don't. The front driveshaft isn't turning.
When I switch to 4LO it turns traction control off and operates normally, front and rear wheels turn.
I switched back to AWD, turned the traction control off, the front wheels turned briefly, then stopped.
With the truck off and in neutral I can turn the rear driveshaft by hand and the front does not turn.
The front driveshaft feels a bit like it is binding when turning by hand, it freely as the rear.
I pulled the fuses for ABS and the Stabilitrak systems. Turned the truck on, and got all the corresponding warnings and chimes, but no difference in symptoms.
I switched to 4LO again, and the truck performed as intended. Went back to neutral, changed back to AWD, and into drive, the front wheels were turning, which was an improvement. I could brake and release the brake and they would turn.
As soon as I went to neutral or park and then back to drive, the front wheels wouldn't turn. Go back to 4LO, they would turn, switch back to AWD, shift from neutral to drive and they would turn. Shift to park or neutral and then back to drive.. nothing.
The other thing of note is that all four wheels are off the ground. When the rear wheels are turning and the fronts are not, there is no interference or evidence of the traction control working. No chimes, no bells, no sounds of brakes being activated to change the differential in the wheel speed.
Thoughts? Internal transfer case issue? Stabilitrak issue (no dash/message center warnings, etc)? Switch issue? Stabilitrak control module?
TIA
We get the occasional traction control warning when leaving stop signs, etc, turning traction control off makes that go away. Suspected wheel speed sensor that needs to be changed.
It developed a shake under power, doesn't happen when it is first started but after 10-15 miles. Felt like a CV joint or U joint.
It has the Borg-Warner AWD Transfer case. Fluid is within 1/8in of full at the fill hole, fluid is clean.
It is currently on jack stands with all four corners in the air. The transfer case is supposed to split power constantly at 40/60 f/r.
When I put it in drive or reverse the rear wheels turn, fronts don't. The front driveshaft isn't turning.
When I switch to 4LO it turns traction control off and operates normally, front and rear wheels turn.
I switched back to AWD, turned the traction control off, the front wheels turned briefly, then stopped.
With the truck off and in neutral I can turn the rear driveshaft by hand and the front does not turn.
The front driveshaft feels a bit like it is binding when turning by hand, it freely as the rear.
I pulled the fuses for ABS and the Stabilitrak systems. Turned the truck on, and got all the corresponding warnings and chimes, but no difference in symptoms.
I switched to 4LO again, and the truck performed as intended. Went back to neutral, changed back to AWD, and into drive, the front wheels were turning, which was an improvement. I could brake and release the brake and they would turn.
As soon as I went to neutral or park and then back to drive, the front wheels wouldn't turn. Go back to 4LO, they would turn, switch back to AWD, shift from neutral to drive and they would turn. Shift to park or neutral and then back to drive.. nothing.
The other thing of note is that all four wheels are off the ground. When the rear wheels are turning and the fronts are not, there is no interference or evidence of the traction control working. No chimes, no bells, no sounds of brakes being activated to change the differential in the wheel speed.
Thoughts? Internal transfer case issue? Stabilitrak issue (no dash/message center warnings, etc)? Switch issue? Stabilitrak control module?
TIA