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Old 05-13-2015, 12:11 PM   #1
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Checking Trans Fluid from the dash

I remember that there is some way to check the trans fluid level from the trans control buttons and/or the smart wheel, but, for the life of me I can't remember the procedure. Can anyone help these aging memory brain cells?
Thanks, Mike
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Old 05-13-2015, 12:15 PM   #2
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You'll find a bunch of info in this manual, on level testing and codes.
Attached Files
File Type: pdf Allison trans codes.pdf (425.7 KB, 68 views)
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Old 05-13-2015, 12:28 PM   #3
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It can only be checked after the transmission is fully warmed up. With the engine running, transmission in neutral, push the up and down arrow on the Allison shift pad at the same time. It will begin a countdown and then OL will appear followed by the amount it is high/low. Just turn off the key when finished.

And, a good idea after oil level is reported to push the up and down arrow at the same time AGAIN. That will bring you to the Diagnostic Codes. It will show d-1 followed by a two sequence code if there is a stored code. If it shows d-1 followed by - -, there are no codes. If there is a d-1, push the mode button to bring up d-2. Continue until - - appears.
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Old 05-14-2015, 06:13 PM   #4
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Checking trans from dash

Thanks for the info! I will make sure to print it out and keep it handy.
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Old 05-14-2015, 06:38 PM   #5
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After recently having Cummins Cal Pacific service the transmission, fluid and filters, I was surprised when the technician went into a detailed discussion on the invoice how he added a specific amount of fluid, drove the coach to achieve stable temperatures, and proceeded to check the fluid levels by using the transmission control panel. He noted three steps to progressively achieve the desired level. I thought it somewhat strange that not once was the dipstick referenced. After reading the manual it appeared that this was indeed the correct procedure. To further verify using the control panel and its readouts I called Allison and chatted with one of their engineers who informed me that Cummins was absolutely correct; and it is Allison's philosophy that the keypad is the only accurate method to verify transmission fluid level.
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Old 05-29-2015, 07:06 AM   #6
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checking trans. from dash

I didn't get all the enfo on my Alpine. Does this apply to all Allison trans. six speed with Cummins. I have a 2003 38FD and I have a brother with a six speed in a Coachman.
Thanks
Larry Pate
2003 Alpine Coach 38FDDS 350 ISC Cummins
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Old 05-29-2015, 08:40 AM   #7
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Quote:
Originally Posted by greenmachine View Post
I didn't get all the enfo on my Alpine. Does this apply to all Allison trans. six speed with Cummins. I have a 2003 38FD and I have a brother with a six speed in a Coachman.
Thanks
Larry Pate
2003 Alpine Coach 38FDDS 350 ISC Cummins
Yes, it applies to all but the earliest 3000 and 4000 Allisons.

On the early ones, the first push of the up and down arrows at the same time takes you right to diagnostic codes.

All the newer ones (beginning late 1990's) have both fluid level AND diagnostic code check.
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Old 05-29-2015, 10:26 AM   #8
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Quote:
Originally Posted by greenmachine View Post
I didn't get all the enfo on my Alpine. Does this apply to all Allison trans. six speed with Cummins. I have a 2003 38FD and I have a brother with a six speed in a Coachman.
Thanks
Larry Pate
2003 Alpine Coach 38FDDS 350 ISC Cummins
Did you see the manual in post 2?
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