Question about 2002 Chevrolet Suburban

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2002 Suburban Roaring noise while driving only if i press pedal!

I have a 2002 Suburban that when I put it in reverse I hear a clunk. When I drive i hear a roaring/howeling noise in the middle of the truck towards the front while its only in 2WD. But if I put it in 4Hi or 4LOW it makes a even louder noise and gets increasingly worse. I have been looking it over all new Wheel bearings up front new pads, rotors, rear rotors and pads good as well as it is a disc rear end. I checked fluid levels throughout the transfercase and rear end and found them somewhat low. I have also observed underneith the drive shaft from transfercase to rear end is rusty, the u-joints dont seem bad but where it goes in to the rear end it has a oil residue like a leak coming from the place where the drive shaft goes in. I dont know exactly what it could be but I am leaning honestly towards rear end and drive shaft but I am not 100% Sure!

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It looks like you have a defective pinion bearing which causes the load applied to the ring and pinion gears to mismatch, this causes this condition you are describing and because the hollow drive attaches to the "yoke" which is bolted directly to the end of the pinion the noise is difficult to pin point.
Your description is excellent and your observation is good too, it makes it a lot easier to answer.
The leak at the "yoke" you see is reveling, the loss of rear end gear lube has caused the bearing failure and almost without exception all of these cases have had this leak.
The solution is to locate a complete rear end and swap them out, for a 2002 car it is cost prohibitive to replace the ring gear, pinion and bearing set plus labor.
These rear ends seldom fail so your chances of getting a bad one is slim. Last one I bought was about 200 bucks, they are worth much more but the salvage yard is probably full of them.
You could have a center carrier bearing failure in the transfer case but based on your description it is unlikely.
I have some advice,; it is dangerous to drive this vehicle in this condition because at some point it will fail and could cause an accident harming you and others.
Even though the fluids are full, it probably became low enough at one time to start the damage that led to where you are now.
So based on your description, this is the most likely solution.
Let someone verify it for you, it's really not that big a deal. Good luck...
Gabe

Posted on Jan 14, 2013

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Posted on Jan 02, 2017

  • 69 Answers

SOURCE: Front end roaring noise

jack it up and see if the wheels wobble when you try to move them if they do make sure the play is not in the ball joint it's most likley the bearing

Posted on Jul 15, 2009

jmgldsmth
  • 1869 Answers

SOURCE: 2001 Chevrolet Cavalier front End Roar

You must replace wheel bearings in pairs to avoid loading the old bearing and, in time ruining your new bearing hub it is possible that you have already damaged the new hub

Posted on Apr 20, 2009

solasknows
  • 199 Answers

SOURCE: '95 tahoe making noise when accelerating; sounds

no it should not spin when is in 2wd thanks

Posted on Jul 22, 2009

  • 4336 Answers

SOURCE: i own a 06 chevrolet 4wd. it makes an awful roaring noise

There is a bearing, somehwere that is the most likely cause.

Does anything alter the sound, accelleration, decell, moderate turning (thinking to unload one side and load the other side of the vehicle)?

My vote would be for a bearing, and they are hard to tell until you tear the offending bearing apart...

Posted on Sep 21, 2009

  • 99 Answers

SOURCE: a friend has a 2000 chevy malibu. when driving at

Well, that depends, do you have front-wheel drive or rear wheel drive? With front wheel drive, you most likely have a CV joint problem on the drive axle. The best way to find out how to do ANY repair to any make or model car is to buy (or borrow) a chilton or hanes manual from an auto parts store (or library). They are not very expensive and save you tons of money, by helping you fix the most common, and many uncommon problems, step-by-step.

Posted on Oct 02, 2009

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