Hmm, I need to get mine weighed sometime soon cuz now you've got my curiousity aroused. I was going to sneak onto the scale they had at the fair last year for weighing all the tractors and trucks for sled pulls but by the time I got to my truck and back they were disconnecting it. :-( I'd definitely get those u-joints replaced. They might be good, but if you're going to pull step up to something really heavy duty instead of taking a chance!