Resolving Allison MD3000MH transmission error

Try removing power for a few minutes. Then start and bring tranny temp up to a temp above 150 degrees then try checking fluid level again by pressing up & down arrows on pad at same time.

12 minutes ago, klcdenver said:

Try removing power for a few minutes. Then start and bring tranny temp up to a temp above 150 degrees then try checking fluid level again by pressing up & down arrows on pad at same time.

When removing power do you mean disconnect battery for a few minutes? 

Yes unhook battery to help reset.

Thank you for your help i will try it today!!

Here is a summary but it omitted to make sure tranny is up to temp. You can get tranny up to temp by starting and put in gear while holding brake. Be sure and watch temp and do not overheat it.

Transmission checks.docx

Hello looks like trans themp sensor is not working temp did not move on dash gauge. (any suggestion)

Also i could not shift to help circulate fluid as check trans light was still on. Do we happen to have picture or location of trans temp sensor?

This is erro code i get if i press both arrow buttons twice see video 

Try pressing the mode button for 10 seconds. This is suppose to reset the fault codes. After this it should go to N.

Owners manual also attached. The manual has a diagram for wiring and it is all one harness.

Allison 3000 MH Owners Manual.pdf