Sorry for not responding earlier to those who provided feedback to me in trying to figure out what was going on with the Allison tranny in my MH.
Since this happened on a Sunday Labor Day weekend we couldn’t get it looked at until Tuesday at the earliest. We drove it only a few miles, parked it and waited.
Cummins Pacific ( Allison, Cummins and Onan specialists) in W. Sacramento was our best option after talking with competitive repair places and also that we had good experience at their Fresno facility.
By noon on a Tuesday the diagnostic was completed. The tranny showed inactive codes (incorrect 2nd gear ratio) plus 1 or 2 other things. They replaced the solenoid screen and an internal harness. $77 in parts plus 5 hours labor including the diagnostic. They got me in and out the door in less than 36 hours. Giving a little extra priority to a traveler in a motor home away from home with a reefer full of food, a wife and 2 dogs was something I won’t forget.
Did it get fixed right? I think so because that day I headed I-80 to Reno and I could effortlessly climb up 6-7,000 feet. Now 6 days later I am in Yellowstone 900 miles away from the fix and all is well.
Thanks for reading and thanks for responding to my request of Sept 4th.