| Noisy 370 FD [message #230421] |
Wed, 20 November 2013 09:03  |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Just replaced our 307 FD with a 370 and find the 370 makes a loud whine when decelerating.
Anyone else have this problem or is it not a problem?
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: [GMCnet] Noisy 370 FD [message #230426 is a reply to message #230421] |
Wed, 20 November 2013 09:29  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Is it a lim slip?
Todd Sullivan
Sully
77 royale
Seattle
> On Nov 20, 2013, at 7:03 AM, Richard MacDonald <rm1936@gmail.com> wrote:
>
>
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> Just replaced our 307 FD with a 370 and find the 370 makes a loud whine when decelerating.
> Anyone else have this problem or is it not a problem?
> --
> Richard MacDonald
> Punta Gorda, Florida
> 76 Edgemonte TZE 266V102313
> Howell TBI EBL
>
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Noisy 370 FD [message #230463 is a reply to message #230421] |
Wed, 20 November 2013 12:22 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| Oldngray wrote on Wed, 20 November 2013 08:03 |
Just replaced our 307 FD with a 370 and find the 370 makes a loud whine when decelerating.
Anyone else have this problem or is it not a problem?
|
Our coach is generally really quiet inside and I have never noticed any sort of gear whine from the 3.70 limited slip final drive.
I had heard there were issues with some of the early 3.55 units though, but never heard of a problem with a 3.70.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Noisy 370 FD [message #230477 is a reply to message #230464] |
Wed, 20 November 2013 13:27 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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If we did the final drive, Call us
We know more about this than people on the net.
If it does not quiet down, then more than likely, it was not set up properly .
If we did the assembly, we will send you another one at our expense and will reimburse you for the labor to R & R and all freight.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Noisy 370 FD [message #230610 is a reply to message #230421] |
Thu, 21 November 2013 02:49 |
Kirk
Messages: 80
Registered: April 2008
Karma: 0
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My first 3:55 FD in use for over five years was quiet. The pinion bearing disintegrated on that unit.
The warranty replacement 3:55 FD has whined on deceleration since I installed it. The new ring and pinion gears didn't appear to be lapped in. I assume the first unit was lapped in but JimK installed it so I don’t know.
JimK advised me to keep driving and monitor the noise level. I only have about 1500 miles on it so far.
I intend to change the non synthetic FD oil every 1500 miles until the gears are broken in and the noise subsides.
The whining noise on deceleration seems to be improving toward what I hope will be satisfactory and not require replacement.
Kirk & Eloise Yeager -
Motorcyclists/RVers/Dog Lovers -
77 Royale 455/TBI/3:55 -
49ers - N. Nevada -
NdnKirk at Gmail dot com
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| Re: Noisy 370 FD [message #230621 is a reply to message #230421] |
Thu, 21 November 2013 06:47 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Thanks everyone for your replies, I will run it as is for 1500 more miles and then make a decision.
Richard
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: Noisy 370 FD [message #230704 is a reply to message #230421] |
Thu, 21 November 2013 16:36 |
Ray E
Messages: 13
Registered: January 2006
Location: Wauwatosa, Wisconsin
Karma: 0
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For the first year our 3.70 had a little whine when decelerating, it went away and is fine now.
Ray Erspamer - 78 Royale
Wauwatosa, Wisconsin 53226
78gmc-roayale@att.net
414-484-9431
Our Web Page: http://ray-lisa.page.tl
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| Re: Noisy 370 FD [message #230738 is a reply to message #230704] |
Fri, 22 November 2013 01:41 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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All or gears are lapped in at the factory, but sometimes the location is not always possible to match.
The factory tells us that each batch is identical.
I have outright told them that they are full of Sh t.
We have over 3,000 units running, so we have considerable history.
I hate to advise people to drive it with the whine for 1500-2000, but our last 2 batch sings on coast.
We have 2 locations that set our gears, they know what they are doing, so I will be on the manufacture again.
In the service manual, they mention that there will be noise.
Most of us have coaches that have over 50,000 miles on the gears, so never experienced noise.
When I was working for Ford, we authorize few replacement when they could not be adjusted out.
If any one that have acquired final drive fron us that is continuing to make noise , contact us for free replacement.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Noisy 370 FD [message #230768 is a reply to message #230738] |
Fri, 22 November 2013 08:49 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| jim kanomata wrote on Fri, 22 November 2013 00:41 |
All or gears are lapped in at the factory, but sometimes the location is not always possible to match.
The factory tells us that each batch is identical.
I have outright told them that they are full of Sh t.
We have over 3,000 units running, so we have considerable history.
I hate to advise people to drive it with the whine for 1500-2000, but our last 2 batch sings on coast.
We have 2 locations that set our gears, they know what they are doing, so I will be on the manufacture again.
In the service manual, they mention that there will be noise.
Most of us have coaches that have over 50,000 miles on the gears, so never experienced noise.
When I was working for Ford, we authorize few replacement when they could not be adjusted out.
If any one that have acquired final drive fron us that is continuing to make noise , contact us for free replacement.
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Final drive noise is a tough tough issue. After hundreds of millions of cars and trucks, the OEM's still have issues as well.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Noisy 370 FD [message #230778 is a reply to message #230738] |
Fri, 22 November 2013 10:36 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Mine makes no noise under load or cruise and the noise on decel seems to be going away after about 1k miles. The locking action seems better now than when new as well. It wasn't a bad noise anyway. I kind of liked it :/
Todd Sullivan
Sully
77 royale
Seattle
> On Nov 21, 2013, at 11:41 PM, jim kanomata <jimk@appliedairfilters.com> wrote:
>
>
>
> All or gears are lapped in at the factory, but sometimes the location is not always possible to match.
> The factory tells us that each batch is identical.
> I have outright told them that they are full of Sh t.
> We have over 3,000 units running, so we have considerable history.
> I hate to advise people to drive it with the whine for 1500-2000, but our last 2 batch sings on coast.
> We have 2 locations that set our gears, they know what they are doing, so I will be on the manufacture again.
> In the service manual, they mention that there will be noise.
> Most of us have coaches that have over 50,000 miles on the gears, so never experienced noise.
> When I was working for Ford, we authorize few replacement when they could not be adjusted out.
> If any one that have acquired final drive fron us that is continuing to make noise , contact us for free replacement.
> --
> Applied/GMC, Fremont, CA
> 1-800-752-7502
> jimk@appliedgmc.com
> www.appliedgmc.com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Noisy 370 FD [message #230832 is a reply to message #230421] |
Fri, 22 November 2013 19:20 |
mickey szilagyi
Messages: 273
Registered: January 2013
Karma: 0
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Senior Member |
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We replaced our OEM FD in our 77 Kingsley about 2 months ago with Jim K's 3.70 and limited slip but have only had the opportunity to drive it about 150 miles so far. It does whine upon deceleration but not that bad. We're assuming it's not an indication it's a bad FD or bad install and hopefully we're not ruining something by driving it. It's in storage for the winter and we'll put more miles on it in the spring. So far we like the performance difference it has provided.
Mickey
1977 Kingsley, 403, Lansing, MI
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| Re: Noisy 370 FD [message #230958 is a reply to message #230897] |
Sat, 23 November 2013 22:06 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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Senior Member |
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Always use the regular lub for the first 2,000 miles, then go synthetic.
We supply several units a month, so we need input so we can do a better job of assembly and give feedback to our gear manufacture.
We do not hesitate to replace units when a customer contacts us and advise us that they have a noisy unit,
Our warren is for 5 years and unlimited mileage.
We even warrantied one when a customer forgot to put grease in and ruined it.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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