Question about Chevrolet TrailBlazer
The front splined disconnect mechanism is either broken or dried out and not moving completely. This will require a disassembly and inspection.
Posted on Mar 25, 2014
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Posted on Jan 02, 2017
SOURCE: GRINDING IN FRONT END
This sounds like a major problem. I had the same issue with a different truck. I will tell you in all honesty that the front-end is blown. The noise will continue to get worse. Soon it will occur driving in a straight line. The carrier bearings are symptomatic of failure. Its safe to drive on for a while, but in the long run you can eventually snap the front end. But before you go on rebuilding or selling the vehicle drain the fluid and replace with new and see if the problem goes away after driving 8-15 times in a flat parking lot doing figure-eights.
Posted on Sep 15, 2008
I replaced the malfunctioning “thermal actuator” with the “Warn” Vacuum actuator setup, it’s been working great for about 7 years now, simple install, if I remember correctly, it was about $150.
That’s what engages the front diff into 4wd.
Posted on Nov 25, 2008
It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
Posted on Mar 19, 2009
Sounds like you have a IWE that the gears are ground down, or a bad vacuum line to that side.
This could have been caused by the IWE ( Integrated Wheel End ) solenoid ) TSB :
You can check the vacuum line with a vacuum pump and gauge tester, just to be sure, but considering it is grinding while in 4WD, I would say the IWE needs to be replaced on that side. Maybe change the IWE solenoid while you are doing the work ( it will be a rounding error on the total cost )
Posted on Feb 03, 2010
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