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09-24-2011, 12:36 AM
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#1 |
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Registered User
Join Date: Sep 2011
Location: longview, texas
Posts: 28
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Rear End Noise
1986 C10 Silverado bagged truck.
Bought the truck with some rear end whine at 40 mph to 60mph or so only on acceleration. Soon as I let off, sound goes away. Diff fluid is full, but looks a little dirty. I'm pretty sure this is the original rear end with no rebuild. Thinking about taking to the local diff/drive shaft shop. Does this sound like a ring and pinion issue, or do you think I'll need a rebuild? I don't have any clunking or grinding noises. Thanks |
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09-24-2011, 04:09 AM
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#2 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Rear End Noise
is it a whining howling noise? if so its a rear end about to die and rather worn
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09-24-2011, 08:14 AM
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#3 | ||
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just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear End Noise
Quote:
In most cases it is easier/quicker/cheaper to find a used complete housing. You just have to be aware of what you are looking for and what you are looking at as a replacement. This gives you the option to change gear ratio, if you choose. But the main thing is that you "get into it", you need to see inside. This gives you some idea of the wear, confirms the gear ratio, and whether there is some kind of posi-traction unit installed. If there is a "gov-lock" (factory Posi for those years), it is not necessarily a "deal-breaker", but don't pay any extra for it. This is a quick bolt-in, requiring nothing more than your time, some gear lube, a gasket, and maybe some new U-bolts. It is used, so it may not last forever, but it is cheap and easy, plus you can do it again.
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09-24-2011, 08:16 AM
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#4 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: Rear End Noise
Ring and pinion mesh noise is a high pitched pure tone, around 370 Hz, depending on the gear ratio (...if that helps
 ).It's pretty typical for it to light off on just coast - or just accel - or just decel. Sometimes they are just noisey and will last forever, especially as you get up into the higher numerical ratios. You could either run it and find out, or have it rebuilt but it's probably taken a set now and you'd need a new ring and pinion. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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09-24-2011, 09:00 AM
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#5 |
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Registered User
Join Date: Sep 2011
Location: longview, texas
Posts: 28
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Re: Rear End Noise
thanks guys!
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