Does anyone know where the Allison transmission ecm is located?
2000 U320
Mine is in the main storage bay on the left side a couple of feet in at rear of the bay at the top.
Your need to take a cover off to get at it. It's hard to find.
On mine it's in the water bay on the passenger side high up and above the water pump. I do have to remove some panels to get to it. Mine is a 42'