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Transfer case on 2005 gmc 2500hd truck makes a clunking noise when 4wd is engaged.

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More than likely the transfer case chain is loose, have the slack checked, there is a gage they use to check this

Posted on Sep 16, 2010

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Posted on Jan 02, 2017

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1 Answer

05 envoy 4wd not engaging


Most likely cause is the encoder motor on the transfer case. This is the motor that activates the transfer case. Usually sets a code so you may want to have it scanned.

Feb 12, 2015 | 2005 GMC Envoy

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4wd not engaging. Check actuator and seems to working properly. Jacked front end up and and when in 4wd the front tires spin freely. Any suggestions?


Does the driveshaft for the front wheels turn when in 4wd? The actuater might work but the diff lock for the front wheels might have broken. If the front driveshaft does not turn when in 4wd, the transfer case might be the problem.

Jan 02, 2014 | 2008 Chevrolet Silverado 2500HD

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First good snow of the year & my 4WD engaged, but had some horrible clunking from center front of vehicle at 25 -30 mph. I could also feel it through the floor board. The 4WD seems to be working but I...


I don't think you will know whats going on until someone takes the transfer case apart. It could be the shifter stuck in mid position and it is not completely in either position.

Feb 01, 2013 | 2004 Chevrolet Silverado 2500HD

1 Answer

1998 ford explorer 4wd makes a clunking noise when i turn and the 4wd lights flash every 2 min. like it wont go out of 4wd or something?


The clunking noise could be coming from three different areas. Either the front or rear differentials could make that noise along with the transfer case. I would initially be looking at the transfer case as the culprit since you mentioned the 4wd light coming and going. My thinking is that the 4wd engagement solenoid is malfunctioning and trying to bring in the 4wd, then releasing it. The only good way to check the function and noise for this is to put the car on a lift.

Apr 27, 2010 | 1999 Ford Explorer

1 Answer

2003 chevy silverado 2500hd 4wd makes grinding noise when i put it in 4wd but won't engage


sound like the shift motor or shift gear in transfer case that makes it go into 4WD.sound like gear damage or worn

Jan 01, 2010 | 2003 Chevrolet Silverado 2500HD

2 Answers

Switching in to 4wd on the fly get a loud clunk and some grinding


Yeah i get the same thing when im hitting the whoops at 80 miles an hour.What is the deal with this.

Jan 21, 2009 | 2003 GMC Sierra 2500HD

1 Answer

98 Jimmy 4WD clunk


It seems like no one else hear at FixYa is responding yet to both your requests about clunking in 4wd.
I see two requests....in the first a 2000 blazer from Gloeckz
there is a rapid clunking in 4wd!
In the second it clunks hard going in then won't drive!
This is rayenc11s' 98 Jimmy 4WD clunk I'm no trans specialist and not familiar with repairing or troubleshooting serious 4wd problems but it sounds like this may be a problem in the transfer case.

Since no one seems to be helping you but me I'd suggest you go to a transmission shop and ask them if this is a common problem that may lead to a bad transfer case if not corrected!

Make sure you have the proper fluid in your transmission case, transfer case and differential case first or have a quick oil change place check it for you!

Hope this is helpful.

Good Luck!
c04bf14.jpg jackiaria

Jan 05, 2009 | 2001 Chevrolet Blazer

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