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Chevy front diff

Clunking sound coming from front differential area when backing up in 4wd low.Starting to do it in 4 h.It drives fine normally 4wd or 2.

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Mine started doing that i had to have the hubs rebuilt

Posted on Feb 09, 2014

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Posted on Jan 02, 2017

  • 12 Answers

SOURCE: Chevy Tahoe 2001

Place vehicle in 4wd (high or low). This will hold the front drive shaft still for the rest of the test. Jack up the front end of the vehicle. Remove the actuator. Have a buddy spin the right front wheel while you use a long punch or screwdriver to try to manually engage the diff. The left front wheel should spin in the other direction if the diff is good. Also before you check the diff you need to grab the front driveshaft and make sure it is locked, If it spins freely when the truck is in park and in 4wd with the front end raised then problem is in transfer case. If you can't make the diff engage manually with punch then the problem is in the diff. If front diff engages manually then the problem is the actuator. Hope this helps..

Posted on Nov 27, 2008

neuropagan
  • 46 Answers

SOURCE: a clunking on passengers side at rear

universal joints clunk,is it in the rear end then maybe it is the rear end.you kinda need to be more specific if this information doesn't help

Posted on Apr 23, 2009

  • 1 Answer

SOURCE: 97 jimmy 4wd front differential

You cannot pull the front differential and drive the vehicle. The wheel bearings are tied into the front axle, and won't properly lubricate if not installed.

Posted on May 17, 2009

  • 245 Answers

SOURCE: clunking front hubs

usually the noise in the front end is the u-joints or cv joints out towards the tires.

Posted on May 21, 2009

  • 10 Answers

SOURCE: 4 wheel drive will not engage (1995 S10 Blazer)

I had this same problem a few years ago. In my case I didn't use the 4 Wheel Drive very often and the tranfer would hang in 2 Wheel. I fixed mine by tapping on the transfer case with a hammer while my wife switched back and forth from 2 Wheel to 4 Wheel.

Posted on Jun 14, 2009

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That is most likely the transfer case that is doing this not the differential.

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I can grab the drive shaft & move it in & out 3" from the front pumpkin. Was turning left & heard a big "clunk". I was in 4WD. Now if I put it in 4WD, it clunks and grinds & slips in &...


it sounds like the front differential needs to be rebuilt, if the driveshaft moves up and down then the pinion bearing has failed. the most economical way to deal with this issue is to replace whole unit with a low mileage one from the auto recyclers..

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1 Answer

4x4 transimission clunks when engaged?


When engaging the 4WD system, you are pulling the lever on the Transfer Case right? Not the transmission, it's a different gearbox.
There were several versions of transfer cases that used both full and part-time 4 wheel drive.
From your description this sounds like a part-time transfer case.
Going with that, it is somewhat normal to hear and feel a mild clunk when engaging 4WD high range, especially if you are at a complete stand-still or under full throttle.
Try engaging 4WD High while slowly rolling at idle - no throttle. It should pull in fairly smoothly.
Once 4WD is engaged it will literally LOCK the front and rear axles together. So do not do it on hard dry pavement.
These older style 4WD systems need a little "give" especially when turning. The engineers assume you are not engaging 4WD unless you are in a somewhat slippery scenario.
Many CV joints, axles, U-Joints, differentials, and transfer cases are damaged and broken by folks who don't understand this.
Reading the owners manual should provide a clearer description of what you've got.
Bear in mind that when you come out of 4WD it may not completely release, again due to hard pavement binding up the axles. You can try this: backing up 10-25 feet in a straight line, or getting one set of wheels on the shoulder or in some gravel. That should allow it to release the transfer case and go back to everyday 2WD high.
I hope this helps.
:)

May 14, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Noise in front diff


Three probable issues;
1-The transfer case is low or out of fluid.
2-The drive shaft may be out of alignment due to worn front or back U joints (thus the clunk on shift)
3-the shift lever is out of alignment with the shift mechanism on the transmission housing.

Mar 26, 2009 | 1989 Chevrolet K1500

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1999 chev blazer 4x4 system


I have a 1999 chevy blazer that stuck in 4 wheel drive. How do you get it out.

Nov 23, 2008 | 1999 Chevrolet Blazer

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