I would just like to add my name to the list of failed transmissions. I was towing a round bail hay wagon "around 7000lbs" for my father through the field and it died! Lights on the dash lit up like a christmas tree.
My truck went to the shop a week ago yesterday. I got a phone call from shop today saying it need a tranny. They will have one by end of next week !!
I love the truck. The only problem I have ever had with it was some kind of relay that wouldn't let it stay running. It took about a week for the service shop to figure the problem out and fix it.
So I am looking at about 3 3 1/2 week total loss of truck to get fix, what a disappointment
PS
Truck has 5800 miles on it.