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just wonderin noise from rear of drivetrain
I,ve got a 99 silverado and a 02 subruban both make a kind of clunking noise from the rear end area when you put them in gear, ujoints are fine. Was wonderin if anyone else has had this problem and what they found out, ie just gear play, spring wrap up, just anything youv'e found out.
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just wonderin noise from rear of drivetrain
First, I have never owned a GM product, having said that what you are experiencing is what millions of owners have said for years and years, past/present/and no doubt will well into the future, apparently just a normal thing with the rearend thinking of the GM engineering staff!
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just wonderin noise from rear of drivetrain
When the ring and pinion gears wear it creates excessive back lash. A good driveline shop will use a dial indicator to check the backlash and adjust it using shims. They will put some white grease on the gears and check the wear pattern of the gears to make sure they are meshing properly. Also,when the pinion bearing wears it will create some play in the pinion gear. This can cause a little play also. If you have a lot of miles on the vehicles, you would be better off leaving the differentials as they are. Sometimes adjusting the ring and pinion on a vehicle with a lot of miles will create a whining noise in the rear diff. Chock your rear wheels, put the tansmission in neutral and turn the driveshaft by hand. You will see the play in the driveshaft.
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just wonderin noise from rear of drivetrain
My neighbor is the validation engineer for the L-5 and V-8 engines for GM. When I bought a new 2004 Silverado, I noticed a clunk in the drive line. I strapped him in to find out what the hell was going on. He claims the drive-line clunk is a "calibration" issue with the V-8 driveline. GM doesn't have a re-cal for it. The calibration is the computer setting for fuel/air/trans interaction, and once established for a EPA certification, it isn't supposed to be tampered with.
Thats his story, and he seems to be sticking to it. I give him a hard time over that clunk every time I see him.
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just wonderin noise from rear of drivetrain
Beagle;
I guess it could be as he states, the looser rear end will provide better milage initially. As will the tighter bands in the automatic transmission. Seems like a cheap fix for poor quality machining. Unfortunately, this is what I expect from GM trucks.
Ask him why the 70's era trucks had the same problem?
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just wonderin noise from rear of drivetrain
I don't know if there's excessive lash in the rear-end or tight bands. All I know is they knew about the condition before the 800-series went to market. It's unfortunate, because other than the clunk that will make you believe the drive train is about to poop. the truck drives and handles better than any other 1/2 ton I've driven. It's a great ride, extremely smooth and quite, untill you accelerate. Then....Clunk.
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