Allison fluid and filter change

[rvtips]

I have the 3000MH Allison with the deep sump that I am going to service.
Where is the best place and price to get the fluid and filters?
Is there any thing special I should be aware of ?

[jacwjames]

Do a search on the internet for the filter, I believe the part number is
29548988 but check to make sure. Ebay has several listed.
29548988 | eBay

You may want to check the type of oil you have, Castrol Transynd oil is the recommended oil now. This is always hard to find at a good price. The last time I bought some over the counter it was at a Clark Service for OTR trucks. I've also ordered from places via the internet but there are not many listed now. Here is one
Transynd Synthetic Fluid | DMAX Store


I've changed my oil once and then ~3 years later did a filter change. The first time I checked with the nearest Allison service center and they wanted +~$600, YIKES.

It's not hard, the filters are accessed via 2 cover plates, just make sure you keep everything clean and when you go back be careful with the bolts so you don't cross thread and check the torque requirements.

If you drain all the oil out it may take ~6-7 gallons, changing just the filters takes less, last time I changed the filters I only drained 1 gallon out.

You should be able to check your transmission oil level using the touch pad, pressing both the up & down arrows. Make sure your level is good before you start or note if it is low. Catch all the oil you drain out and put this much back in (unless it showed you were low) and then ~1 quart for the oil trapped in the filters.

Good Luck

[kent342]

Make sure you use the Allison filters, don't use the after market ones, they don't flow the same. I had mine changed last fall, and as a result the trans temps increased 20 degrees higher. Had an Allison shop check it out and they said it was the filters, changed them and back to normal.

[Mike Canter]

Well, you should go up on the Allison section of IRV2. First thing is unless somebody has changed your fluid and put in the wrong stuff it came from the factory with Transynd fluid and does not need a fluid change anytime soon. Yes on changing your filter but top it up with Transynd afterwards. Use the auto fluid level check in your Allison shift pad to see how much fluid you need because according to Allison that is far more accurate than the dipstick and the preferred method. The transmission has to be above 140* f and let the mh sit for about with the motor running and in neutral then ush the up and down arrows on the shift pad at the same time and it will tell you if Ok or if you need to add. Try it first and see before you change the filter

[Spk64]

Might be good to send a sample out for testing. This will give you a good baseline on the condition of your fluid and if anything is wearing or contaminating the fluid.
Just had my transmission checked. Best $35 I have spent.

[rmcb]

I just bought Shell Rotella ELC at Tractor Supply for about $14.50/GL for the concentrate.

[echo3]

I think the number which jacwjames gave is likely correct. I just changed mine in a 05 MH3000 Allison and it was easy. Be sue to notice the torque values given for the two filter cover plates and the drain plug. There is even a online video which covers this. I used Transynd and found my best price at a local Allison Distributor (under $35 per gal). I ordered the filters earlier from United Fleet Parts, but U might get at the distributor for a better price. At 10 yrs old and way past due on filter change, I decided to change fluid rather than test and just do filters.. It takes 19 qts. I had Transynd in mine, so U will need to get more info if changing from regular fluid.
David White '05 Windsor

[rmcb]

Duh,,,,,,answered wrong post. Time for a nap.

[danes-on-tour]

Originally Posted by rmcb

Duh,,,,,,answered wrong post. Time for a nap.

[dadej]

Check rvchassisparts. I think you will find their price very good. If I remember with a minimum order their was no freight.

[Mike Canter]

I just looked up the latest service recommendation interval when the transmission fluid if 100% TES 295 certified fluid is used which is the Allison Transynd fluid. The first filter change is at 5000 miles and then at 75,000 mile intervals after that. The fluid change is at 150,000 mile intervals.

Be very aware of ATF products that say they are TES-295 approved for Allison transmissions. Use only TES-295 fluids that have been tested and certified by Allison. Allision publishes a list of these approved fluids and believe it or not Mobil 1 Synthetic ATF or Amsoil ATF is NOT approved.

Also, according to Allison never use Dexron fluid in the transmission. It is not compatible with the seals in the transmission.

[rmcb]

Henrik, this could happen to you some day! Small tablet, fat fingers, scrolling too fast, background distractions, sleepy eyes, trying to multi-task..... I suppose any two of above could result in answering the wrong post. There are other factors as well which I would never admit to. I felt like kicking myself except I would have probably lost my balance and fell over. I hope you guys didn't get distracted by this.

Also wanting to be sure about about the condition of my trans fluid, I plan to follow recommendations on the Allison thread to get an oil analysis. Service records show trans fluid and filters changed (with "HD Synthetic") 2 years ago at 24K. Coach now has 42K. From white paper towel "test", it looks like Transynd but I'm not positive that it is.

[rmcb]

By the way, for reference, the Sacramento Cummins shop quoted me about $72 for the filters and $40/gl for Transynd.

[William Willard]

rmcb -- Roy - The Air Force let you work on airplanes for 30 years ? Amazing -- Bill Willard