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10-13-2011, 08:20 AM
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#1
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Junior Member
Join Date: Oct 2011
Location: Summer North/Winter Southwest
Posts: 4
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Allison Oil change
I have a 2005 Mandalay with a Cat 350 & Allison 3000MH transmission. I have 39K miles.
I was told that I have Dexron III ATF in my transmission & I need to replace it at the change to TranSynd.
I am unable to find out how do i change the oil/filters to get it all out. Will TranSynd & Dexron III formula match? I know/was told that I will need 19 quarts during the change. How much is left in the transmission? Will I need to make two oil changes with some run-time between to get all the Dexron III out?
Ed
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10-13-2011, 10:34 AM
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#2
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Senior Member
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
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Ed,
Yes, the transynd and Dex III are compatible. There is no approved method to do a 100% change at one time. The Allison approved method is to change the filters and fluid by draining using the drain plug. Then consider the mixture as Dex III for drain schedule purposes. Some people drain again almost immediately and others run for 12 months or longer. After the change, consider the fluid as 100% Transynd. At that point use the Transynd drain schedule or start a program of fluid analysis to determine drain schedule.
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
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10-13-2011, 06:35 PM
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#3
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Senior Member
Join Date: Jul 2007
Posts: 1,173
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As Steve said. You get the real benefits from the change to Transynd after the second change. Allison has that information somewhere but I can't remember where nor can I find it again. Unless you are in a rush to get to all Transynd, I would run a season on the first Transynd change then do the filters and fluid change after that to get the full advantage of Transynd.
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Pete - Full Timing
2000 Country Coach Magna 40' Indulgence, CAT C10, #5892
2019 Ford Ranger XLT
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10-13-2011, 06:54 PM
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#4
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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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Quote:
Originally Posted by phays
As Steve said. You get the real benefits from the change to Transynd after the second change. Allison has that information somewhere but I can't remember where nor can I find it again. Unless you are in a rush to get to all Transynd, I would run a season on the first Transynd change then do the filters and fluid change after that to get the full advantage of Transynd.
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That's what I did. The transmission temp dropped 20° after both fluid changes.
The filters come with a good instruction sheet and all the gaskets. Easy to do if you can turn a wrench. Just watch the torque when doing the filter covers as the bolts (6 on each filter) can be stripped.
Here's a link to some of the info you need.
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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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10-14-2011, 08:25 AM
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#5
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Junior Member
Join Date: Oct 2011
Location: Summer North/Winter Southwest
Posts: 4
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Thanks to all for your response!
Ed & Key Largo (the cat)
2005 Mandalay 40e
2011 Jeep Wrangler Sarah
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2005 Mandalay - 2011 Jeep Wrangler Sahara
Military Travel Club - Mandalay Travel Club
Thor Diesel Club - Freightliner Chassis Club
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11-26-2011, 03:18 PM
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#6
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Member
Join Date: Oct 2002
Location: Brownsville Tx. 78526
Posts: 92
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Lot of advice about Transynd but Dexron has been used for many years with good results.If you want to spend a lotta money. Go ahead.
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Ron
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11-26-2011, 03:22 PM
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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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Quote:
Originally Posted by ronmc
Lot of advice about Transynd but Dexron has been used for many years with good results.If you want to spend a lotta money. Go ahead.
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True, but Dexron is no longer approved for use in new Allison transmissions. In fact it might not be approved for older transmission now as GM is not testing or certifying Dexron fluids anymore. A fluid manufacturer can call anything Dexron now or say it meets Dexron specs and no one can stop them.
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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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11-27-2011, 01:07 AM
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#8
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Senior Member
Join Date: Apr 2010
Posts: 637
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Quote:
Originally Posted by Mr_D
True, but Dexron is no longer approved for use in new Allison transmissions. In fact it might not be approved for older transmission now as GM is not testing or certifying Dexron fluids anymore. A fluid manufacturer can call anything Dexron now or say it meets Dexron specs and no one can stop them.
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Mkebikecop.....Tom, the Allison Engineer, was back on the forum several days ago.....not sure if he still is. He is a wealth of information, so I hope he is still onboard.
When I saw him back on the forum four days ago, I sent him a post/question re Allison's website info for Dexron III ATF. The Allison Approved Fluids website lists ALL of the Dexron ATF fluids, by manufacturer, that meet their TES-389 standard and are currently approved for use in their transmissions. The website also includes the Approval #. Tom assured me that any Dexron III fluid listed on that website meets TES-389 and is approved for use in Allison transmissions originally filled with Dexron III or currently using Dexron III. He also stated that, of course, the change intervals and costs vary between Dexron III and TranSynd. I currently use ExxonMobil ATF D/M. It is Dexron III ATF approved by Allison and meets TES-389. Don't know yet if I will make the change to TranSynd.
Hope this helps....
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2003 Fleetwood Revolution DP
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11-27-2011, 06:04 AM
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#9
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,671
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A 2005 motorhome chassis would have come with Transynd already installed anyway. Mandalay is built on a Freightliner XC chassis and FL has been using Transynd with their Allisons since 2003 or maybe even before.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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11-27-2011, 04:37 PM
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#10
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Senior Member
National RV Owners Club
Join Date: Jun 2010
Posts: 4,581
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FYI My 2004 on a Freightliner chassis (built in 2003) came with Dexron.
Bob
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SW OREGON 2005 34 foot DolphinLX
If towing: a bright red 2016 Mini Cooper on a tow dolly.
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11-30-2011, 03:26 PM
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#11
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Senior Member
Commercial Member
Join Date: Apr 2011
Location: Avon, IN
Posts: 706
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Tom Johnson back on the Allison forum
Quote:
Originally Posted by Steve Ownby
Ed,
Yes, the transynd and Dex III are compatible. There is no approved method to do a 100% change at one time. The Allison approved method is to change the filters and fluid by draining using the drain plug. Then consider the mixture as Dex III for drain schedule purposes. Some people drain again almost immediately and others run for 12 months or longer. After the change, consider the fluid as 100% Transynd. At that point use the Transynd drain schedule or start a program of fluid analysis to determine drain schedule.
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Steve,
I'm back to stay. I took a vacation for awhile but now I'm back to answer questions. So, let's route everyone with Allison fluid questions back over to the original thread which I believe can be found at: http://www.irv2.com/forums/f125/former-allison-transmission-fluids-engineer-89293.html
__________________
Tom Johnson
Former Allison Transmission Fluids Engineer, "Mr. TranSynd"
President and Founder at JG Lubricant Services, LLC
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12-01-2011, 05:55 PM
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#12
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,671
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My 2004 American Tradition, built on a 2004 Freightliner in December 2003, has Transynd. Maybe the RV manufacturer specifies it when ordering the chassis?
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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12-01-2011, 08:10 PM
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#13
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Member
Join Date: Feb 2009
Location: United States
Posts: 50
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Valvoline still makes Dexron III and it DOES have the Allison approved TES number.
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12-01-2011, 08:21 PM
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#14
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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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Quote:
Originally Posted by Gary RVRoamer
My 2004 American Tradition, built on a 2004 Freightliner in December 2003, has Transynd. Maybe the RV manufacturer specifies it when ordering the chassis?
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Yep, exactly.
The trans is tested with TranSynd, drained as much as possible then shipped to the chassis manufacturer who then fills it with whatever the chassis buyer spec's.
__________________
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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