Palazzo Allison Transmission 2100 MH
Took usedunit out on first trip. about 200 miles in we experienced the transmission automatically go from overdrive (6th gear) to 4th gear. The RPM changed as should be expected. This did this numerous times. As we were experiencing ice and snow we pulled over and stayed a rest stop. Next morning was good for another 50 miles. Found a repair shop and they replaced the power supply cable to the the transmissions TCM. Test drove for 20 miles no problem. About 150 miles later got into some rain and acted up again (same conditions but this time only dropped from 6 to 5 gear. Once dried up no issue.
On way home we experienced same problem with the transmission shifting from overdrive (6th gear) to other gears during wet conditions. This is a 2017 Palazoo with only 3500 miles.
Wondering if anyone else has experienced something similar. Thor defers to allison who I am calling tomorrow.
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