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#26 |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
Finally got some time to get truck on road, slight whine, but no biggie at this point. Dang if I dont notice whine and gear noise in any car i get into now.
I still get a hum at 70 MPH, deffinatley drive train related. Ease down under 70 and it quits. Was told by another Old Hot Rod buddy that this was normal with these new gear sets, given time the gears will wear into pattern and hum will go away. The whine will never really go away. Anyone else experience the hum? Bear in mind this is the second set of gears and second set of bearings. thanks guys! tt
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1968 StepSide GM 350 Crate / 700r4 |
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#27 |
Registered User
Join Date: Mar 2012
Location: Boulder, CO
Posts: 350
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Re: Rearend Whine after rebuild???
Is the centre carrier bearing in good shape? Also, universal joints- known good or unknown? Sounds the rear axle is set up properly, you might want to eliminate any other driveline components as the source. An outside chance is tire noise. Once we had a Ford Taurus in the shop with an alleged front bearing noise, we replaced the bearing and CV axle at the customer's request. Noise still there- when test-driving, found out that the roof rack (for a sailboard) was the source of the noise- pulled it off, nice and quiet. Sometimes it's not readily apparent.
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#28 | |
Account Suspended
Join Date: Jul 2015
Location: Bisbee AZ
Posts: 43
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Re: Rearend Whine after rebuild???
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#29 |
Registered User
Join Date: May 2014
Location: Manteca, Ca.
Posts: 274
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Re: Rearend Whine after rebuild???
The quality of parts these days really gets me and then the idea of, it whines and will always whine, so live with it, does also.
If you bought a brand new pickup and the rear end whined, would you not take it back? Or not buy it!!! Those have brand new gears in them also. It used to be that you bought a gear set that was matched and you know what, it did not whine. That was the reason that you bought a MATCHED gear set. Sorry, off my rant.
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Terry Soon to be retired and moving to Bristol, TN. |
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#30 | |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
Quote:
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1968 StepSide GM 350 Crate / 700r4 |
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#31 | |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
Quote:
Hopefully when the gears wear in and polish themselves up it will be good. After 500 mile inspection on first gear set you could still see tool marks, gears had yet to wear into polished pattern, which means this steel is very very very very hard. (Im gonna say that OEM is somwhat softer) Shop replaced all bearings and a new gear set with a little better results. BL was set to 11/1000. Ive been into every part of cars and trucks by myself for many years but this is the first rearend, and thanks to all you guys I am learning alot. thanks! tt
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1968 StepSide GM 350 Crate / 700r4 |
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#32 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Rearend Whine after rebuild???
After all this talk about rear axle whine I thought you guys might enjoy some "science" from one of the OEMs...
For your entertainment - 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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#33 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Rearend Whine after rebuild???
...
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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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#34 |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
Hey Keith, that is awesome stuff. But, were do we get a dampener? Wouldn't that be kewl!
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1968 StepSide GM 350 Crate / 700r4 |
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#35 |
Registered User
Join Date: Aug 2012
Location: U.P. of Michigan
Posts: 115
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Re: Rearend Whine after rebuild???
I seen a cardboard tube inside of a driveshaft. I was told it was a fairly common thing to reduce ringing noises. I only seen this once, although I haven't cut all that many driveshafts apart. Anybody else ever seen this?
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#36 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Rearend Whine after rebuild???
Quote:
That's why we quit doing it. 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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#37 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Rearend Whine after rebuild???
Quote:
Some time I'll have to tell you about tuning those. 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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#38 |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
OK guys, pulled cover and checked wear pattern which looked good. And backlash was showing 13 Thousandths. Pretty much no noticable whine, and no hum at 70mph.
Is it ok to live with the 13 thousandths? No doubt this gets tighter when everything gets hot. thanks tt
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1968 StepSide GM 350 Crate / 700r4 |
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#39 | |
Account Suspended
Join Date: Jul 2015
Location: Traverse City MI
Posts: 147
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Re: Rearend Whine after rebuild???
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#40 | |
Account Suspended
Join Date: Jul 2015
Location: Traverse City MI
Posts: 147
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Re: Rearend Whine after rebuild???
Quote:
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#41 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Rearend Whine after rebuild???
Well....because we were talking about technical solutions that span across multiple GM product lines (S/T truck as well)....
It looked like some of the guys around here were interested in learning some "science". Quote:
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/ Last edited by Keith Seymore; 08-05-2015 at 02:19 PM. |
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#42 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: Rearend Whine after rebuild???
Cause I always wondered what that ring on the Astro driveshaft was, now I know.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#43 |
Registered User
Join Date: Jul 2014
Location: maylene, al
Posts: 73
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Re: Rearend Whine after rebuild???
After you mentioned that, now I know exactly what ya'll are tlking about. Ha!
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1968 StepSide GM 350 Crate / 700r4 |
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