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Old 09-16-2014, 05:19 PM   #1
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Transmission question

I need to know how and where to add oil to my transmission. I have a 1998 HR Endeavor 37WDS with an Allison MD3060 tranny. I have looked in the rear engine compartment and see no dip stick. I have opened the engine compartment under the bed and see no place to add the oil. My shift panel says I am 7 quarts low. I see no leaks. The oil and filters were serviced at 26,000 miles. The coach has 36,000 on it now. This is driving me nuts. I have searched everywhere and no one can tell me the procedure to add oil. I posted this on the Class A forum as well.

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Old 09-16-2014, 05:21 PM   #2
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I added this:
I followed the instructions on the Allison instruction page for checking level and here is what my display reads out. I have a single digit display. MH level, in neutral, brake set, running for 10 minutes with ambient temp at 90 F. Pushed arrow buttons simultaneously.
Display reads O o L - 7 continuously.

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Old 09-16-2014, 05:43 PM   #3
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Transmission question

I'm not aware of any other place besides the dipstick tube to add fluid. If there is, I sure would like to know where because it's not easy putting five gallons down that tube after a change.
I don't know where yours is located but mine is accessed from the outside. upper left side of engine when looking forward. It has a T-handle.

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Old 09-16-2014, 05:49 PM   #4
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I believe the Allison 3060 has bores on either side for installation of a dipstick. Some manufacturers put long tubes, reaching to the rear next to the radiator for super long dipsticks. Others only use a short one that sticks up just a little higher than the transmission top. The side without the dipstick will have the hole plugged with an expanding plug tightened with a bolt.

Bob & Donna
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Old 09-16-2014, 06:08 PM   #5
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First off - 70 code is low temp. You need to get the temp up above 140deg (If memory serves) before it will go into a count down and give you the oil level. What I do in our shop is power brake the coach, put it in gear and hold the brake down hard then run the rmp's up to 1200 or so watching the tranny oil temp gauge. Now depending on where the gauge sender is located you may have to get the temp on the gauge up to 200 before the tranny really is up to temp. It will give the 70 code until the computer sees it's set point which I believe is 140 deg. If you get it too hot code 90 will come up. If your above the min temp and below the max then the touchpad will go into a count down usually starting at 7, flashing 7 something like 17 times, then 6 and again flash around 17 times and so forth until it gets to 1 then it will give you the oil level.

When it gets to the oil level it will flash "O" then "L" (for oil level) then depending if its high, low or ok it will flash "L" "O" for low or "H" "I" for high or "O" "K" if it's ok. After it flashes a "lo or hi" it will flash numbers 1-4 only and that number is how much its low or high.

I set the tranny at 1 hi when we do a service, that way when the customer drives away if its checked it should read ok or hi 1.

As for where to fill, if it doesn't have a dip stick up top, then go down below and closest to the engine side of the tranny, look above the pan, like looking down at the tranny if it was sitting on the floor, you'll see where it goes. I can get a picture if you cant find it.
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Old 09-16-2014, 09:58 PM   #6
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On my old "1998 HR Endeavor 37WDS with an Allison MD3060 tranny" the dipstick was in the upper right corner in the rear access (radiator area). Turn the 't' handle to remove. That is also the fill tube.

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Old 09-17-2014, 05:50 AM   #7
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InfinityJim has the right info to follow. You can also go to Allison's website and find all kinds of info to read and download. Sure uses a lot of paper and ink to download but it's way cheaper than a transmission!
Good luck and safe travels!

Doug & Connie
2001 Holiday Rambler Imperial 41ft PBD 370hp ISL AF1 braking system
2001 Subaru Forester manual toad
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