Question about Chevrolet TrailBlazer

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When i put it in 4 wheel drive the front end won't lock in it gust grinds

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  • Chevrolet Master
  • 1,311 Answers

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

  • 1 Answer

SOURCE: 1993 Chevy 1500 pickup 4-wheel drive

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

  • 6982 Answers

SOURCE: 99 Silverado 4-wheel drive not engaging

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.
good luck

Posted on Mar 19, 2009

  • 10 Answers

SOURCE: 1990 toyota 4runner 4x4 wont lock in front wheels

your drive shaft thats turning is mabe broke or your automatic 4x4 lockers could be bad

Posted on Apr 10, 2009

sscullys
  • 984 Answers

SOURCE: my 2006 Ford F-150 has a grinding noise in the

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 :
http://my.voyager.net/~sscully/file_tsb06_08_15.pdf

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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2005 dodge ram 2500 4x4....getting an intermittent grinding noise while driving in the front of truck..possible front differential..;....chrisdawe@comcast.net


Hi,
your description is a little generic, however, that is what we shall work on.
Is the grinding apparent whether the 4X4 is engaged or just in 4X2 mode? On left lock or right lock?

Best thing would be to put the front end on axle stands and start checking. Check the front wheel station on each side by trying to rock it top and bottom. Rotate each wheel and check for noise. When doing this check, listen for any noise emanating from the actual drive shafts to the hubs.

Drain the front differential and check the drained oil for metal shavings etc. To be honest, "grinding" noises usually are accompanied by damaged parts. It's just a question of checking each item in turn. Also check the front prop / Drive shaft for UJ's that are dry and thus will make noise. Also include the sliding spline in your check, again, if it's dry it will be noisy, and it could be intermittent.

4X4's need to have the front ends greased on a regular and generous basis.
You did not mention if you had hublocks fitted, which would be another check to carry out.

Good luck.

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Rear wheels on 2000 super duty f250 skid in reverse only


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