So I'm cruising up Highway 97 from Bend, destination Prosser, WA in my 06/525 Cat PT with the Allison 4000. Couple idiot light ABS, Step out and ATC start erratically flashing on/off. I pull off the road at Shaniko. Step's not out and I figure a ground wire must be bouncing around somewhere behind the dash. Then I notice as well, a red Check Trans Warning. I got the manual and looked for the accompanying symptoms, like flashing digits on readout, shifter locked up, elevated temp and low oil. Nothing. So I did what any techno challenged guy would do, I shut it down and then restarted. No more warning light so off we go for the 100 mile remainder of the trip, no issues. Wineries mostly shut down cause of the dread bug so we decided to leave the next morning for Anacortes. No warning lights of any kind, Trans oil read "OK" so off we go. About 4 hours into the trip, on comes the Check Trans light again. Coach is running fine and shifting perfectly. But then I notice it won't shift into 6th gear, 1,750 RPM and 70 MPH in 5th but wont go into 6th. Drove the last 40 miles in, let her cool down, shut her down and in a bit restarted. Again warning gone. There;s a FreightaLiner dealer in Mt Vernon Who I'll talk to tomorrow. I'd like to get her back home to Bend where I know the coach docs. Any thoughts?