Allison transmission

The start the generator suggestion will work IF, repeat IF your on-board converter, charger or inverter/charger is wired to charge the CHASSIS battery as well as the HOUSE battery.

All charge the house bank. Only some charge the chassis battery as well.

If yours does not, and you have a constant on boost switch (vs a momentary switch that you have to hold in to have it active) this will work if you use the boost switch.

But, my suggestion is to get the batteries fully charged, then check the alternator. If not working, get it repaired/replaced.

Getting stranded on the side of the road with a dead electrical system is no fun, particularly if you are not comfortable working with electrical systems.

My alternator went out while I was traveling and the warning lights came on telling me I had low voltage. I stopped and the Allison wouldn't shift anymore. Like one poster posted I just started the generator with the coach batteries and it came to life. I continued on until I got home so I could change the alternator myself.

Start your genarater and let it charge the batterys for about an houer and see if it will shift then.
Bill

Oh thanks! I have had a battery problem recently. I think the alternator is out, I just didn't think there was a connection to the batteries. Very helpful.

Many things will cause the Allison not to shift...rpm to high, jacks down, parking brake on...call Allison, they can help.

Check your chassis battery voltage. Allison defaults to neutral at 11 volts and won't shift.