Help needed: Allison transmission
Hello, everyone. New to a class A diesel pusher and the associated driving. I'm having a difficult time figuring out the gear selection in our rig -- which is a new winnebago forza with the allison 6 speed transmission.
Specifically, I'm having a hard time locking to, or switching between, gears while ascending/descending hills through a mountain pass. The automatic transmission shifting works just fine. I have the standard layout with select and monitor, and then RND on the left, and Mode+- on the right.
When in auto, it displays 6-1, and then makes normal shifts displaying 6-x -- with x being whatever gear is currently in play. All works fine.
I tried to follow the manual when ascending or descending hills, and will press the down button twice (for example, currently 6-5 to get to 4-4) and that's where my problems start. It will display 5-5 and then when I press it again, it just reads 4. That is, the first number (select) just goes blank. The right number (monitor) will stay 4, and then seemingly run at high rpms but up/down shift as necessary (normally between just 3 and 4). If I press Drive (D) to try and go back to automatic, nothing happens. I can't return to auto mode. Pressing + or - also does nothing, as it just stays in whatever gear it is in -- regardless of high or low rpms. The select display remains blank.
To get it to return to auto, I have to pull over, stop, put in neutral and then press D(rive) again. Then it's back to 6-1 and life is good.
Any thoughts on what I'm doing wrong? Or is there an issue that's not on my end? What's most frustrating is that I can't get it back to previous state by either pressing the up arrow or pressing D(rive).
Thanks in advance for any wisdom!
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