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Grinding noise in front end. I've done everything!

Raptorrider22

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Raptorrider22 New Member

Raptorrider22

Posted
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I have a 2005 Silverado with 130,xxx miles. I love the truck and have babied it since I bought it about a year ago. When the truck is in 4x4 or auto 4x4 it will make a grinding/rubbing noise in the front of the vehicle. It sounds like the front drivers side. I have had new bearings put in the front diff, new fluid in the diff and t case. new encoder motor, new wheel bearings, and new cv axles. what am I missing here? the noise goes away in 2wd almost instantly but when in 4x4 it comes right back. I am going crazy trying to figure this out. The only part it seems I have left is the 4x4 actuator in the front diff. could this cause a grinding concern?

Raptorrider22 New Member

Raptorrider22

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I have to ask if this is your first GM 4WD?

No. I have a 95 and you cant even tell its in 4wd when you drive it. this one I can feel a groan in the front end as soon as I engage 4wd. and messing with it at lunch it is just slight around 30 mph but you can feel it. and then when coming to a stop it gets louder. is my whole front diff going out?

O_J_Simpson Senior Enthusiast

O_J_Simpson

Posted
Posted

No. I have a 95 and you cant even tell its in 4wd when you drive it. this one I can feel a groan in the front end as soon as I engage 4wd. and messing with it at lunch it is just slight around 30 mph but you can feel it. and then when coming to a stop it gets louder. is my whole front diff going out?

This one does not make sense. Might be time for a test drive with a local differential shop guy. A good one can tell you what is going on right away after a test drive. Much easier than a post description.

 

Interesting you said 95 as that truck had a different heated engagement system from the factory that took much longer to fully engage and resulted in not hearing 4WD noise right away. Many of these trucks were upgraded to the mechanical engagement system that resulted in more noise right away as it fully engaged in a few seconds.

arcasey Enthusiast

arcasey

Posted
Posted

I have a 96 K1500 that was exhibiting these same symptoms about 4-5 months ago. My truck was experiencing some bucking when first starting off and then everything would be fine. No real noise in 2WD but when I would put it in 4WD It would buck even worse and I had an obnoxious grinding noise. I ended replacing the transfer case and all my 4WD grinding noises went away. I still had some grinding after the T-case was installed and about 150 miles later my transmission went out. Could be a number of different other things as drive line noises can fool you because sometimes they may be coming from a totally different area than where you think they are coming from. Some 4WD noise in a GM is normal. If it is truly a "grinding" noise then you have an issue for sure. One way to find your issue is to jack your truck up and put it in 4WD. Then put the transmission in neutral and remove the driveshafts (if you are sure the noise is only coming from the front then just remove the front). With it jacked up you c an spin the front differential and listen to it. If the grinding noise you are hearing is coming from the front end components you will hear it while spinning the differential. If everything sounds normal then I would probably start looking into the T-case. Sometimes the chain in the T-case can get loose and it will make some noise. When you changed you T-case fluid did you look to see if there were metal shavings in the fluid?

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