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Noise when off the gas.

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Old 05-17-2008, 08:42 PM
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Default Noise when off the gas.

I have a noise when i let off the gas and it quietens down a little when i give it a little gas. Any ideas on what it could be.
Old 05-17-2008, 09:09 PM
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Originally Posted by jc99ls1ss
I have a noise when i let off the gas and it quietens down a little when i give it a little gas. Any ideas on what it could be.
Loose pinion or incorrect set up if gear has been changed.
Old 05-17-2008, 11:49 PM
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um, type of noise would help guys pinpoint it more
Old 05-20-2008, 05:52 PM
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It is kind of sounds like a roaring noise or real bad road noise. Can't figure out why it is louder when I let off the gas.
Old 05-20-2008, 06:21 PM
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stock gears or aftermarket?
Old 05-20-2008, 07:14 PM
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stock gears and rearend
Old 05-20-2008, 07:26 PM
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the same thing started happening to mine this weekend but i've got 4'11 i think it might be time for a new rearend what do ya'll think
Old 05-20-2008, 09:53 PM
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It's probably a shot rear end to be honest. How many miles are on the car?

I'd crack it open and see the damage. You can always throw in gears with a master install kit and be as good as new and faster.
Old 05-20-2008, 11:31 PM
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Originally Posted by sway99bird
the same thing started happening to mine this weekend but i've got 4'11 i think it might be time for a new rearend what do ya'll think
my 4.10s went out a few weeks ago, they were totally chipped i had to get the damn thing towed! it was a major pain, i replaced thm with 3.73's...ur best bet is to pull the cover off and take a look
Old 05-20-2008, 11:33 PM
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Originally Posted by jc99ls1ss
It is kind of sounds like a roaring noise or real bad road noise. Can't figure out why it is louder when I let off the gas.
mine was kind of the opposite, mine would make the noise only whn i was on the gas, could b ur pinion, or rear end goin...how many miles? if u cant do it ur self u should prob take it somewhere to have thm pull the cover off and cheeck for u...i made the mistake of waiting to long and ended up haveing to get it towed cause the gears were totally shot
Old 05-21-2008, 07:10 AM
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The car has 115k on it. Other than the noise when off the gas it is acting ok. I will go ahead and put it on stands and pull the cover and see what I see when I get a chance.
Old 05-21-2008, 07:24 PM
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Originally Posted by LS184
my 4.10s went out a few weeks ago, they were totally chipped i had to get the damn thing towed! it was a major pain, i replaced thm with 3.73's...ur best bet is to pull the cover off and take a look
thanks man i'm going to take to get looked at and switch over to 3.73's
Old 05-21-2008, 10:28 PM
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i have one of these but its more of a noise + vibration kinda a wuow wuow wuow just at the brink of letting off from a cruising speed. I can kinda play a tune with the gas pedal it sucks. I think mine is a bent housing or axel shaft.
Old 05-22-2008, 12:05 AM
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Originally Posted by sway99bird
thanks man i'm going to take to get looked at and switch over to 3.73's
hey no problem....i wouldnt evr recommend putting 4.10's in a stock rear-end....its kinda like throwing ur money away in some cases....switching to 3.73's is a good idea a much stronger gear...ive had mine for almost 600 miles, im goin to take it back to the guy who put thm in and have him take a look at it and make sure they settled right, and put some more gear lube in it....i did notice a little power difference switching gears though, i gained a little more top end power which is nice, and a little but not much mpg!
Old 05-22-2008, 06:33 AM
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Originally Posted by jc99ls1ss
The car has 115k on it. Other than the noise when off the gas it is acting ok. I will go ahead and put it on stands and pull the cover and see what I see when I get a chance.
If that's the case, it may be that the crush collar has opened up some clearance and taken some preload off the pinion bearing. Not too unusual with all those miles and if it has ever been driven hard (my collar opened up about 0.010" with just a couple of bad wheel-hops after 80K miles!). You may not see anything with the cover off. To be certain, you would need to remove the carrier and check the pinion preload. If the preload is short, and since the noise is still only on coast-down, you may be able to 'cinch-up' the preload torque and quiet it down a bit. However, I wouldn't expect much with 115K old bearings (having said that, I know someone who did just that and is up to another 40K already!).
Old 05-22-2008, 11:28 AM
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Sounds like bad pinion bearings.
Old 05-25-2008, 04:08 PM
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pinion bearings...learned the hard way on that one...
Old 05-25-2008, 08:26 PM
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preciate the info. Soon as I get a chance gonna tear it down and look. may go ahead and swap to 373 while i'm in there until I get enough money to go 12 b or 9"
Old 05-25-2008, 11:25 PM
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I have the same problem with my 2000 ss mine is more of a finger rubbing on a crystal glass with water sound when i slow down to a stop or turn and brake? What might that be?
Old 05-26-2008, 01:54 PM
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How do you know if your Pinion Bearings are bad?



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