Transmission oil and filters when to change ?

Your Allison owners manual (also available online from Allison) give their recommendations for both fluid and filter changes.

Assume you have Transynd fluid-- you need to verify, as its change recommendations are quite a lot longer than with Dexron.

I would suggest you look in your Allison transmission manual. It will give you the change intervals. I seem to recall that they recommend changing the fluid around 10,000 miles, and then after that it is a long interval: 50,000 or 100,000 miles.

Hmm, seems I posted this at the same time Brett did.

Ed Headington

If it's a Allison 3000 or 4000 transmission and you have Transynd then it's 5 years or unless your oil monitor system indicates otherwise. You should be able to check the following off the Allison transmission selector key pad.

OL - oil level ( two minute delay after stopping in idle engine on) press up and down arrows at the same time

OM - maintenance required (change) - press arrow key again while in above mode and it will scroll to one of the following and indicate, "OK" or a issue

FM - filter maintenance

TM - maintenance

If you read your owners manual it's all stated. If not your can download a Allison manual on-line by doing a search.

If you see a wrench in that display you have something needing to be addressed. You really need to get a manual

Like always the manual is the best answer for your question.

BUT.... sitting around a campfire with a transmission guy and he said if you changed the fluid at 30,000 when you first get the rig, then per the manual you'll never have problems.

Google....Allison 1040, that is the correct information you need. :)

Twomed wrote:
Google....Allison 1040, that is the correct information you need. :)

he has a Allison 3060 series

its somewhere around 50k on filters or 5 years
I only aspire to miles myself

Thanks so much everyone. I have an appointment Monday at Coach care to Winterize I'll have them service the transmission ,the engine oil and all filters .

Gordysvette wrote:
Thanks so much everyone. I have an appointment Monday at Coach care to Winterize I'll have them service the transmission ,the engine oil and all filters .

u have only 32000 miles on it? you said u changed "several times" already; A ISL can go 20000 miles on oil change;
so how could it need a oil change already??

It is recommended on my coach to change every 5yrs or 100,000 miles. So I change mine every 5yrs as we only avg around 7000 miles a yr. I tend to always do general maintenance slightly before it is recommended. We love our MH and it gives me a piece of mind.

Here you go. Just answer the questions on this Allison site: Service intervals