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GMC Sierra 2500 hd 4X4 grinding sound

Tiny
FIRECHEESE
  • MEMBER
  • 2012 GMC C2500
MY 02 GMC SIERRA 2500 HD 4X4 HAS 65000 MILES AND 6.0 LITRE ENGINE. WHEN I PUT MY TRUCK INTO 4HI TUESDAY AM IT STARTED A GRINDING/GROWLING SOUND, AND DID NOT OPERATE WELL. I WENT BACK TO 2HI AND IT DID NOT GO OUT OF 4HI LIKE IT USUALLY DOES. LAST WEEK I FORGOT TO TAKE IT OUT OF 4HI WHEN I GOT TO A MAIN ROAD THAT WAS DRY, THE TRUCK STARTED MAKING THE GRINDING SOUND AND ACTUALLY CAME TO A STOP, I PUT IT INTO 2HI AND IT WAS FINE. WHAT DID I DO TO MY TRUCK? IS IT GOING TO BE COSTLY? HELP, MY TRUCK IS MY SECOND INCOME AND I AM BROKE WITHOUT IT!
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Tuesday, February 13th, 2007 AT 7:05 PM

5 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Have the transfer case check.
It's not good to operate in 4WD when driving on dry surface. The push-pull action may have cause the transfer case to make noise.
It's could be transfer case's bearings damage.
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Tuesday, February 13th, 2007 AT 9:49 PM
Tiny
FIRECHEESE
  • MEMBER
  • 3 POSTS
Thanks for the info, is that typically an expensive fix and how long would it take to repair usually. Should I have a transmission shop repair or can I take it to my normal mechanic who has the knowledge? What do you reccommend?
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Wednesday, February 14th, 2007 AT 1:35 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Take it to a mechanic who has the knowledge.
Just have him diagnose the transfer case first and find out if we come to same conclusion.
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Thursday, February 15th, 2007 AT 10:24 AM
Tiny
FIRECHEESE
  • MEMBER
  • 3 POSTS
Thanks for the info, I took it in and it was diagnosed as having the pinion and pinion bearings damaged causing damage to the front differential gears. A complete rebuild of the front differential and $1400.00 later(most of which is labor, nothings easy right?) And a week later I may have my truck in 4 wheel drive again. He did say that the transfer case appears to be fine with no damage. Thanks again for the advice.
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Thursday, February 15th, 2007 AT 8:02 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Sorry about this. At least you will get your car back and running good soon.
Let us know how your car is running when you get it back.
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Friday, February 16th, 2007 AT 9:49 AM

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