Home » Public Forums » GMCnet » Whining noise
| Whining noise [message #150842] |
Mon, 28 November 2011 11:19  |
biggreen
Messages: 347
Registered: June 2011
Location: Northeast Florida
Karma: 1
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Took my first short (100 mile) trip after installing a 3:55 final drive. Replaced it for the performance reasons and also because a whine had developed which I was told could be the final drive. Noise was heard mostly upon deceleration.
With the new final drive, the whine is much louder, is heard again on deceleration, but now also at low speeds, usually below 35-40 mph. It is a smooth whine. Transmission ( just serviced new fluid and filter) shifts and operates fine. Used the proper gear oil as per instructions by Jim K.
Any ideas? Thanks.
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| Re: [GMCnet] Whining noise [message #150850 is a reply to message #150842] |
Mon, 28 November 2011 11:47  |
Gary Worobec
Messages: 867
Registered: May 2005
Karma: -1
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Hi,
That's a bit of a known issue with that ratio. Not sure why. However, we've
had ours in for about 4000 miles and it does get better and now to the point
where I would have to listen hard to hear it. I considered both the 3.55 and
the 3.70 on our 23' coach but did not want to run the engine outside the
torque curve so opted for the 3.55 which for us is just fine even when
towing. On a 26 I'm not sure. I'm actually more concerned about the noise
from my two fuel pumps that feed the EFI.
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
----- Original Message -----
From: "R.D. Hart" <regor5556@yahoo.com>
To: <gmclist@temp.gmcnet.org>
Sent: Monday, November 28, 2011 9:19 AM
Subject: [GMCnet] Whining noise
>
>
> Took my first short (100 mile) trip after installing a 3:55 final drive.
> Replaced it for the performance reasons and also because a whine had
> developed which I was told could be the final drive. Noise was heard
> mostly upon deceleration.
>
> With the new final drive, the whine is much louder, is heard again on
> deceleration, but now also at low speeds, usually below 35-40 mph. It is
> a smooth whine. Transmission ( just serviced new fluid and filter) shifts
> and operates fine. Used the proper gear oil as per instructions by Jim K.
>
> Any ideas? Thanks.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Whining noise [message #150857 is a reply to message #150842] |
Mon, 28 November 2011 12:20 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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R.D. It is quite common for newly installed final drive gears to whine for
the first few thousand miles. The usual proceedure would be to drive it
like you rented it, only after a 250 mile careful run in. After 3500 miles
or so, raise the coach, remove the cover on the final drive and completely
clean out the area under the ring gear and the cover itself. Do not be
surprised to find very fine shiny looking particles in the fluid that you
drain. If the 2 piece gasket is intact, it probably is ok to re use it. Pay
very strict attention to the top of the final drive case where the
labyrinth passages in the gasket are. DO NOT block that vent hole. Make
very sure that vent is open. If you do not, I will gurantee that your final
drive, and perhaps your transmission will leak as well. Refill the final
drive with what the factory recommends, or it's synthetic equal. This
should assure you many miles of worry free operation. The noise comes from
the fact that the gears are not micro polished, and they have to mate into
each other. (break in)
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Nov 28, 2011 at 9:19 AM, R.D. Hart <regor5556@yahoo.com> wrote:
>
>
> Took my first short (100 mile) trip after installing a 3:55 final drive.
> Replaced it for the performance reasons and also because a whine had
> developed which I was told could be the final drive. Noise was heard mostly
> upon deceleration.
>
> With the new final drive, the whine is much louder, is heard again on
> deceleration, but now also at low speeds, usually below 35-40 mph. It is a
> smooth whine. Transmission ( just serviced new fluid and filter) shifts
> and operates fine. Used the proper gear oil as per instructions by Jim K.
>
> Any ideas? Thanks.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Whining noise [message #150863 is a reply to message #150842] |
Mon, 28 November 2011 12:53 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Hi
I replaced our final drive with a Jim K 3:70 in August. It too has a slight
whine on deceleration, but it has gotten quieter in the 900 miles we've put on
since installing it. It's also much quieter when warm vs. cold. This is
very typical from what I've heard, don't worry, just drive and enjoy.
You have not heard a final drive whine until you've driven about 70 miles with
no oil in it........then you hear a whine, growl, grind, clunk, etc........just
ask me how I know !!! <GRIN>
Ray
Ray & Lisa Erspamer
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
----- Original Message ----
From: R.D. Hart <regor5556@yahoo.com>
To: gmclist@temp.gmcnet.org
Sent: Mon, November 28, 2011 11:19:27 AM
Subject: [GMCnet] Whining noise
Took my first short (100 mile) trip after installing a 3:55 final drive.
Replaced it for the performance reasons and also because a whine had developed
which I was told could be the final drive. Noise was heard mostly upon
deceleration.
With the new final drive, the whine is much louder, is heard again on
deceleration, but now also at low speeds, usually below 35-40 mph. It is a
smooth whine. Transmission ( just serviced new fluid and filter) shifts and
operates fine. Used the proper gear oil as per instructions by Jim K.
Any ideas? Thanks.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: Whining noise [message #150868 is a reply to message #150842] |
Mon, 28 November 2011 13:27 |
jknezek
Messages: 1057
Registered: December 2007
Karma: 5
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Senior Member |
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As everyone else has said, been there done that. I put my 3.55 in last summer and it whined for the first 100 miles noticeably, then started getting quieter and, after a couple thousand miles, I don't hear it at all. The mechanic I use said it has happened on almost all the 3.55's he's installed for a while.
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
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| Re: Whining noise [message #150901 is a reply to message #150842] |
Mon, 28 November 2011 20:21 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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My coach whines a bit at speed, but I have a power drive 3.50:1 with the chain plus a 3.21:1 diffy from an eldo, so my RPM's are a bit higher then a 3.07:1 at speed. since my old tranny was crap, I never really drove it at speed so cannot remember what I sounded like.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] Whining noise [message #150903 is a reply to message #150901] |
Mon, 28 November 2011 20:23 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Every time I see that "Whining noise" subject, I want to add "from Charleston" , or insert your state capital here.....
Dolph
On Nov 28, 2011, at 9:21 PM, Chris Choffat wrote:
>
>
> My coach whines a bit at speed, but I have a power drive 3.50:1 with the chain plus a 3.21:1 diffy from an eldo, so my RPM's are a bit higher then a 3.07:1 at speed. since my old tranny was crap, I never really drove it at speed so cannot remember what I sounded like.
> --
> -Chr$: Perpetual SmartAss
> Scottsdale, AZ
> "The Escape Pod" A 77 Ex-Kingsley Featuring: Olds 455, Manny Power Drive, 3:21, Rockwell, Jim B QJET, Quadra bag. Still needs paint!
>
> Photosite: Chrisc "It has Begun"
> _______________________________________________
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| Re: [GMCnet] Whining noise [message #150926 is a reply to message #150903] |
Mon, 28 November 2011 22:41 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Armand,
Thank you, you noticed my shining fanged Ornamental teeth.
With predatory encroachment on or products we might need to quit
taking care of or customers an let him do it
.
>
> On Nov 28, 2011, at 9:21 PM, Chris Choffat wrote:
>
>>
>>
>> My coach whines a bit at speed, but I have a power drive 3.50:1 with the chain plus a 3.21:1 diffy from an eldo, so my RPM's are a bit higher then a 3.07:1 at speed. since my old tranny was crap, I never really drove it at speed so cannot remember what I sounded like.
>> --
>> -Chr$: Perpetual SmartAss
>> Scottsdale, AZ
>> "The Escape Pod" A 77 Ex-Kingsley Featuring: Olds 455, Manny Power Drive, 3:21, Rockwell, Jim B QJET, Quadra bag. Still needs paint!
>>
>> Photosite: Chrisc "It has Begun"
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Whining noise [message #150928 is a reply to message #150842] |
Mon, 28 November 2011 22:52 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Jim, what's encroachment on your differentials? Were you referring to my post? (it was quoted). The power drive was around long before, and I got the Diffy for free. I think a power drive and 3.70 would be way overkill...
???
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] Whining noise [message #150953 is a reply to message #150903] |
Tue, 29 November 2011 08:29 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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[quote title=Dolph Santorine wrote on Mon, 28 November 2011 21:23]Every time I see that "Whining noise" subject, I want to add "from Charleston" , or insert your state capital here.....
Dolph
------
Dolph,
How can anyone under that beautiful gold dome in Charleston whine?
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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