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12-05-2017, 10:57 AM
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#1
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Junior Member
Join Date: Dec 2017
Posts: 3
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Newmar 2002 Dutch Star Allison 3060 transmission shuttering
Transmission shuttering started in 5th gear, now in all gears but 6th. Been to two Allison Transmission shops, they find no problems with transmission on the computer. Had drive shaft balanced and new U joints, now problem worse. Transmission has been serviced.Been to Caterpillar, no problem with engine. Anyone have any ideas where to go next? Shutters worse under load, we are towing a Jeep Grand Cherokee.
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12-05-2017, 11:01 AM
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#2
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2016
Location: Odessa, Tx.
Posts: 845
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Do the symptoms go away if you don't drag the TOAD?
__________________
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)
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12-05-2017, 11:22 AM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,349
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Check ride height. If its off, the driveshaft can shutter.
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12-05-2017, 03:42 PM
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#4
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Senior Member
Newmar Owners Club Tiffin Owners Club Entegra Owners Club
Join Date: Feb 2017
Location: Fulltiming Since 2011
Posts: 1,492
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Hi - Agree with the above about ride height. Also how are the engine/transmission mounts? Not sure exactly what is meant by stuttering. (slipping?, vibration?, gear hunting?)
Tom
__________________
Tom and Annie & Java
2022 Anthem 44B
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12-06-2017, 09:33 AM
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#5
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by workamper306
Transmission shuttering started in 5th gear, now in all gears but 6th. Been to two Allison Transmission shops, they find no problems with transmission on the computer. Had drive shaft balanced and new U joints, now problem worse. Transmission has been serviced.Been to Caterpillar, no problem with engine. Anyone have any ideas where to go next? Shutters worse under load, we are towing a Jeep Grand Cherokee.
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Are you sure it is the tranny? allison trannys are pretty much bullit proof. Possibly a broken motor or transmission mount? Just a guess but that likely would not show up on the computer. Or something like that? U joint?
Interesting problem please keep posted. Q
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12-06-2017, 10:13 AM
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#6
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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A balance weight falling off drive shaft more noticeable on gas coach with long drive shaft.
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12-06-2017, 10:23 AM
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#7
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Shuddering can be caused by the ride height being wrong.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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12-06-2017, 11:46 AM
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#8
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Junior Member
Join Date: Dec 2017
Posts: 3
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Quote:
Originally Posted by JNSNWT
Do the symptoms go away if you don't drag the TOAD?
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The vibration or shuttering is there with and without TOAD.
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12-06-2017, 12:01 PM
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#9
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Junior Member
Join Date: Dec 2017
Posts: 3
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We had the U joints replaced when the drive shaft was balanced. The engine and transmission mounts have been checked and are tight. Did not appear to be broken or loose.
We will be checking on the ride height. Thanks for suggestion.
Any other suggestions will be greatly appreciated.
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12-10-2017, 01:56 PM
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#10
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Senior Member
Join Date: Oct 2010
Location: Duluth, MN
Posts: 411
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On my older coach, I had a vibration, so I replaced the u joints and noticed the vibration was still there. I had to have the coach towed a couple years later and as long as the drive shaft was out, I brought it to a shop that specializes in drive lines. When picking it up, I asked why the cap on one end was shimmed out. It seems that the joint got tight when the cap was in all the way. Installed it that way and my vibration was gone.
__________________
Kent and Sally Lunda 2006 Newmar Mountain Aire 4141 4 Slide 400HP Cummins, Spartan Chassis, Hydro Hot 2016 Ford Explorer (Toad)
Living the dream until the money runs out.
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12-11-2017, 06:24 AM
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#11
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by workamper306
We had the U joints replaced when the drive shaft was balanced. The engine and transmission mounts have been checked and are tight. Did not appear to be broken or loose.
We will be checking on the ride height. Thanks for suggestion.
Any other suggestions will be greatly appreciated.
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Not wanting to insult but how is the fluid level? If the trans has a filter, is it clean?
Q
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