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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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  • 110 Answers

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

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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

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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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2 Answers

98 chevy k2500 front diff rumble vibration when 4wd notengaged , gone when 4wd egaged


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

Nov 17, 2016 | Cars & Trucks

1 Answer

Hi, I have a 1996 chevy S10 Blazer 4x4 and after getting all 4 wheels off the ground have determine that when I put it in 4 wheel drive the front driveshaft (from the transfer case) does in fact turn


the front drive shaft when locked in 4 WD does drive the front diff
that inn turn drives the both front wheels if both have the same amount of traction
if one wheel is off the ground then the other will spin at twice the speed as that is what a differential is designed to do
now if you have a problem diff center ( broken teeth etc ) the there will be awful noises, clunks and bangs as the teeth from the pinion and crown wheel mismatch and hit on each other
no noises when in 4WD indicates a good diff center
the next problem will be a broken axle at the splines into the diff center spider gears ( same as one wheel off the ground or in a bog) the only wheels doing the driving are the rear wheels
next are the "u" joints or cv joints but again there will be lots of noises involved
lastly and the most frequent is the drives at the hubs
depending on the hub locks you have it will not n be locking in one or both wheels due to faulty actuator , dry damaged locking mechanism, stripped splines or not manually engaged
understand this --unless you have limited slip differentials or diff lockers on the vehicle any 2 opposing wheels or any wheels on the same side that have lost traction and regardless of being in 4WD or not you will not be going anywhere
so to fix --start at the drive hubs both sides to check actuation , engagement , then work back into the diff

Sep 03, 2017 | 1996 Chevrolet Blazer

1 Answer

Silverado Clunking in Auto 4wd


check the actuator vacuum/ wires for operation as it sounds like the actuation is not completing the movement properly for the front hubs.

Feb 19, 2014 | Cars & Trucks

1 Answer

Front differential noise.


If you were on hard stand and not on gravel or loose surface then you will experience drive line torque wind up which stresses all loose parts in the entire drive train including the gear box and transfer case.. You may have worn "U" joints or cv joints in the king pin /ball joint area If there has been no service on the front drive axles and joints then the problem may be coming from there.

Feb 09, 2014 | Cars & Trucks

1 Answer

Rear clunk - 99 Nissan Pathfinder


Check for broken rear upper and lower trailing arm bushings that attach to the differential.

Dec 22, 2013 | Cars & Trucks

1 Answer

Just recently bought a 1991 4runner and the 4wd doesnt work. It is the 3.0litre v6 5spd manual. the 4wd indicator light comes on, it easily shifts between ranges and will go into low range when 4 low is...


The 4x4 indicator light is turned on by the actuator at the front differential when it engages the ADD. This means the problem is not at the front differential. It may be an issue with the transfer case if it's the automatic electronic controlled transfer case.

Mar 06, 2018 | Toyota 4Runner Cars & Trucks

1 Answer

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..

Dec 17, 2009 | 2003 Suzuki XL-7

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

2 Answers

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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