@donelias Oh, for sure - there are no hard and fixed answers here. I'm no expert in trucks either, but I do know a little about retrofitting things, and using 40% of the price for a new truck to retrofit a new drivetrain to an old truck seems like a somewhat reckless endavor - and the older the truck, the more reckless it becomes. To be honest I'm mostly concerned for the truck drivers who might be tempted by this as a way to save 60% and keep their business running, only to experience a major malfunction with the rear differential or the main axle and having to shell out a large amount of money on maintaining an old truck because now the money for a new truck is gone. I grew up on a farm, and my father had to make this kind of decision more than once, and sometimes it worked out OK and the machinery kept going, but a couple of time he had to concede that the money was gone, and all he was left with was some old, basically worthless iron that could not do the job. I especially remember one year when a building project ran way over budget and rain made the harvest difficult, and our old combine broke down trying to cope. Dad ended up renting someone to harvest for us, and it almost cost us the farm at the end of the year. I'll never forget the desperate way he tried to fix that old combine but couldn't.
