Update on my 2500 HD.
2900 miles on it so far. Overall, I love the truck. Love how it handles, love the ride, the ergonomics in the cab, all of it. However from the first week I owned it, I noticed an occasional hard/violent downshift when coming to a stop, dropping into either 3rd or 2nd gear (hard to tell which). I figured it was just the heavy duty Allison tranny “learning” my driving habits. Three thousand miles later it’s still doing it, and maybe even worse than in the beginning. I determined that it only occurs after the transmission reaches at least 140 degrees. Anything below that, it shifts smooth and unnoticeable, as it should.
This morning I took it into the dealer for the first oil change. I explained the issue I was having and I took their Transmission Technician for a 20 minute drive to show him first-hand. He agreed something isn’t right with it. After some research, he decided to order a new valve body for the transmission. It’s on backorder, of course. Hopefully that will take care of the shifting problems.
It sucks that even brand new vehicles are plagued with so many problems it seems these days. As much as they cost, it shouldn’t be that way. But I guess that’s what warranties are for.