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Old 07-12-2016, 09:18 AM   #1
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Allison Transmission

Just looking for advice on transmission service. My 2005 Endeavor with the 3000 series Allison has 52,500 miles on it now. The book says do a tranny service including new filters and fresh oil at 75k. My concern is that the unit is a 2005 and the oil and filters have never being changed. I have had the MH in Arizona for most winters but also [ last year ] parked in Canada for the winter in much colder temp's. I am planning a lengthy trip in September and feel i should get it serviced. My mech buddy asked me if it was shifting good and performing properly. I said yes , perfect. He replied , " then leave it alone "
I called an authorized Allison repair shop and the guy told me [ for MH's ] the tranny should be serviced a mininum of every four years even if you only put 10-15k miles on it ??? Then my mech buddy , who is a V good wrench said BS !
I know some will reply " if it puts your mind at ease just get it serviced "
The service is $900 + tax.
I find the best source regarding these issues is right here on this forum......any thoughts on this ??
Thank you.

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Old 07-12-2016, 09:26 AM   #2
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Is there more to the service than fluid and filters? $900 seems like a lot for what is just a big oil change.

I did mine myself. I don't remember the cost, but I would have remembered $900 for sure.

How about a third alternative - draw some fluid and send it to Blackstone or the like to have it analyzed for fatigue or impurities.

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Old 07-12-2016, 09:27 AM   #3
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Allison Transmission

Take a fluid sample and send out for testing. This will let you know a lot about your trans and fluid.
Then have fluid and filters changed.

Testing will be good money spent!
I recommend http://www.jglubricantservices.com/
for your Allison.
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Old 07-12-2016, 09:28 AM   #4
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What does a service imply? I would change the fluid and filter but what else is really necessary for that $900.
I'm sure others with more experience will chime in.
Tampa Bay
'07 40' American Tradition & '14 Honda CRV
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Old 07-12-2016, 11:42 AM   #5
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Thanks for advice so far. The guy at tranny shop says they change oil and filters and also plug in their magic box at port in front fuse panel to see if there are any problems. All this for a "quote" of $900.00 ! So I called Cummins and they said there are two certified Allison dealers in the city of Calgary. I phoned the other shop and they quoted me $619.00 total , tax in. I'm getting the distinct feeling some of these shops take all MH owners as clueless and they can tell you anything and charge what they want. Ha ! Also if they plug in the magic box i'm almost certain some other service, repair will be suddenly required. Wish i wasn't so skeptical of these shops.
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Old 07-12-2016, 11:59 AM   #6
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An simple test of the fluid will tell you much more than plugging in and reading any codes.
Do you have Transynd in the transmission now?
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Old 07-12-2016, 12:21 PM   #7
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Yes , i believe it came new with that fluid.
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Old 07-12-2016, 12:33 PM   #8
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If you have Transend, then you probably don't need to change the fluid. It is designed to last for a looong time (search IRV2 for Transend and you will find a thread by the engineer that actually developed the fluid years ago...he explains how it will essentially last for the life of the coach). The problem is that you really need to know the fluid is doing its job...and that's where testing comes in....research that here to.

I spoke with an Allison rep at the latest Holiday Rambler Pushers Maintenance rally and he told me as long as the fluid test good, I was fine BUT TO CHANGE THE FILTERS as specified (i.e., 75K). There are two in my unit...don't know about yours.

As several have told you, if you regularly pull and test your fluid (there are several companies you can mail the sample to and will test it for you), you can really save a lot of money. Transend is expensive but essentially last forever in a motorhome as long as you don't dilute it with any other transmission fluid, and you don't abuse the transmission. Test it, confirm it is good, change the filters and you should be good. (just make sure it is 100% Transend). The cost to test the fluid is cheap insurance.

BTW, I do the same with my oil and my radiator fluid. I learned my radiator fluid was toast and needed immediately replacement. (it was a used coach, so I wasn't totally surprised.) Again...cheap insurance.
'07 Holiday Rambler Endeavor PRQ ("Elvis"), and our 2012 CRV toad
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Old 07-12-2016, 01:25 PM   #9
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Allison's recommendation is 75,000 miles or 3,000 hours or 36 months for general use. They also do have some documentation for extending life between fluid changes using testing but still recommend filter changes every 36 months.
This is with 100% Transynd, if not 100% then times all go way down.
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Old 07-12-2016, 01:28 PM   #10
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250 bucks for the filters and fluid from Allison, easy do it yer self!
2005 Newmar DS 4023, Spartan Chassis, ISL 370 Cumapart, 2008 Jeep Rubicon 4dr, 2015 Kia Soul, 1969 Italian & 2004 Akita
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Old 07-12-2016, 01:54 PM   #11
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See attached for a Lab Report. I was in a simalar situation in that the fluid was switched out to Transynd but I had no records of any maintenance after that. Only 20,000 miles on the fluid and filters but 5 years.
So first thing I did was sent a sample out for testing. Came back with nothing alarming and the reccomendation was to continue to monitor.
I did go ahead and do a fluid and filter change this spring (Yes, ~$250 and did it myself) and will have a lab test ran next spring for a baseline number.
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Old 07-12-2016, 02:54 PM   #12
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I agree with checking the fluid by testing but I also understand that fluid sitting with moisture that can be inside the transmission can and will be a problem... I didn't see where you said you started and cycled the fluid in the engine and transmission once a month... I'd do that... allowing the unit to run 45 min to 1 hour.... warm enough to boil off any moisture...

In addition I'd change the oil and filter, and if there is a premium full synthetic available I think I'd do that.... while in Alaska last summer I came across a tour bus with a failed Alison World Transmission... he shared that in the lower 48 the exchange transmission was close to $8K and there in Alaska with freight and the higher labor they were spending almost 10K... for that kind of money I think I'd change more based on time and not mileage... remember they were designed to run and drive... not sit for months on time...
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Old 07-12-2016, 03:04 PM   #13
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I got an estimate of $450 to change the filters and refill with Transyn so $900 seems high.
Dennis and Katherine
2000 Monaco Dynasty
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Old 07-12-2016, 06:24 PM   #14
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Testing the fluid is the key. Check the Allison Thread.

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