I may be buying a 96 3/4 ton suburban, 2 wheel drive with a 6.5 diesel. It has 225,000 miles on it. The transmission has never been rebuilt. It doesnt seem to give any problems, not when cold, or hot or anything. The torque converter locks and unlocks when it should. The only time i the truck does anything strange at all is when im pulling a hill, and i have to make the truck work, like, when it comes out of overdrive and my foot is on the floor, it jerks once in a while, say maybe every 10 seconds or so. Once it goes back into overdrive and im no longer working the truck to pull the hill or whatever, it doesnt do it anymore. I dont know if its transmission related or engine but thats the only strange thing i could think of that it does. Now then, the truck belongs to my boss, and id be using it to go to work, including pulling my 7,000 pound power washer trailer when i am not busy with him. He says the only reason he hasnt sold me the truck yet is because he is worried that he'd sell it to me and then something would go wrong with it. Now with that being said, ive driven the truck myself for the last 2 1/2 months and there is nothing seriously wrong with it. Nothing i am concerned with *except* the transmission. Even then that is only because of the milage on it. It doesnt give any indication whatsoever that there might be any problems with it, unless that jerk i described is the transmission. It doesnt leak and the only noise it makes is in first gear around take off, it sounds just like any other heavy duty transmission ive heard, like in a school bus or something. That whiney noise they make as they speed up. It doesnt shift oddly, ever. Not when cold, not when hot, or any other time. It just has 225k on it, and has pulled, alot. Now the question is, how long does a 4l80E transmission typically last if taken care of? Boss has never abused this truck. Its never been run hot, always had its maintainence. He doesnt try and race people to the stoplight or drive like a bat out of hell. His driving habbits are closer to those of grandma and grandpa. Does it sound like i should really worry about it, or should i just find another truck thats maybe had transmission work done less that 225,000 miles ago? lol.