Funny Noise

mikestreed21 · December 14, 2009

I drive an '06 silverado regular cab 8' box 4.8L, 4wd, manual transfer case, 6lug with 80,000 miles. I live in upstate NY. Driving down the road i have a noise. Its a vibration noise that goes in and out rhythmically with the wheel speed. What i mean is the faster the vehicle is going, the faster the vibration and the quicker between cycles. The cycles will be about 2 second of noise, the 2 second of quiet at 40. but at 70 it is closer to 1 second of noise and 1 second of quiet. nnnnnnnn ........ nnnnnnnn ........ nnnnnnnn ........ nnnnnnnn ........ It starts around 25 or 30 depending on how cold it is outside and after a while it gets quieter and eventually go away. Every once in a while it will be there permanantly for 10 seconds or so. Maybe once for each time I drive while the vehicle is "cold". Even if I let the engine warm right up, its always right there. It doesnt matter if its on gravel road, asphault concrete, snow, or whatever. I know its not the tires. Its getting worse and I can feel it in my feet through the pedals. I have had a wheel bearing go and this doesn't seem like this is it. It won't get louder or quieter in a turn. and the wheel doesn't rock top to bottom. I had the front output seal go on my transfer case. I replaced that a few months ago. I am worried I screwed something up or have a serious issue with my transfer case. Help me.

Nytemare · December 15, 2009

No one has any ideas??? TTT

wheels bearing...its starting to go.

mikestreed21 · December 17, 2009

So I took my truck to my buddy's dad at firestone to put a new wheel bearing in. His top mechanic checked them out then took my truck out for a spin and figured out its not a wheel bearing its my rearend making this vibration noise. Anyone know how much this will cost to fix or have any ideas what it is?

Nytemare · December 17, 2009

So I took my truck to my buddy's dad at firestone to put a new wheel bearing in. His top mechanic checked them out then took my truck out for a spin and figured out its not a wheel bearing its my rearend making this vibration noise. Anyone know how much this will cost to fix or have any ideas what it is?

Bearings??? or gears???....could be the G80 Locker causing the noise...that would be a cheaper fix...

A full rear end rebuild is gonna be mucho bucks man. I would guess at 1500 bucks...with new gears and everything....more if you have to replace the locker.

Depending on whats actually gone...you could get away with 500-600 bucks...maybe. Wont know for sure till you pull the cover off and get everything checked out.

mikestreed21 · December 17, 2009

So I took my truck to my buddy's dad at firestone to put a new wheel bearing in. His top mechanic checked them out then took my truck out for a spin and figured out its not a wheel bearing its my rearend making this vibration noise. Anyone know how much this will cost to fix or have any ideas what it is?

Bearings??? or gears???....could be the G80 Locker causing the noise...that would be a cheaper fix...

A full rear end rebuild is gonna be mucho bucks man. I would guess at 1500 bucks...with new gears and everything....more if you have to replace the locker.

Depending on whats actually gone...you could get away with 500-600 bucks...maybe. Wont know for sure till you pull the cover off and get everything checked out.

Is there a carrier bearing on these trucks?

mikestreed21 · December 15, 2009

No one has any ideas??? TTT

wheels bearing...its starting to go.

Yeah? It doesn't sound like it could be another type of bearing? I doubt its a U-joint. I was wondering though if there might have been a link between the seal on the transfer case and a bearing in transfer case going.

Nytemare · December 15, 2009

No one has any ideas??? TTT

wheels bearing...its starting to go.

Yeah? It doesn't sound like it could be another type of bearing? I doubt its a U-joint. I was wondering though if there might have been a link between the seal on the transfer case and a bearing in transfer case going.

Could be....but I seriously doubt it.

mikestreed21 · December 15, 2009

No one has any ideas??? TTT

wheels bearing...its starting to go.

Yeah? It doesn't sound like it could be another type of bearing? I doubt its a U-joint. I was wondering though if there might have been a link between the seal on the transfer case and a bearing in transfer case going.

Could be....but I seriously doubt it.

How long will these things go making this noise before I have to get it fixed?

Nytemare · December 15, 2009

No one has any ideas??? TTT

wheels bearing...its starting to go.

Yeah? It doesn't sound like it could be another type of bearing? I doubt its a U-joint. I was wondering though if there might have been a link between the seal on the transfer case and a bearing in transfer case going.

Could be....but I seriously doubt it.

How long will these things go making this noise before I have to get it fixed?

You should get them replaced as soon as they start making noise. You cannot tell how long they will last...they may last for 1000miles...or they may actually come apart rolling out of your driveway. If one fails while your on the highway...well lets just say you probably wont have to worry about getting your truck fixed. Don't let it go man.

Even if I knew t would last X number of miles...I wouldn't tell you...or anyone else. That could make me personally liable if anything happened.

jro909 · December 15, 2009

could be tires, mine sure make a ruckus

C6Racer · December 20, 2009

My dad has a 2004 GMC K2500HD. The output shaft bushing on the T-case went and caused the driveshaft to start vibrating. He drove it for way too long like that and it eventually took out his whole T-Case costing him $1500. Get under your truck and push up and down on the front end of your driveshaft. If there's more than just a tiny bit of play that isn't in the u-joints then you have a problem there. Of course if theres any play in your u-joints at all, they need replacing. Twist them back and forth. Absolutely no play should be present.

Then again, we have a '91 Chevy Van that also made that noise, but it turned out to be worn diff gears. This one is only 2WD, too.

Good luck!