I've checked for flat spots, and put a bit of antifreeze in the tires for balancing a while ago. The ujoints are all brand new, and the yoke looks brand new. It is still the same driveshaft that the truck came with. The output seal is ripped, but the bearing still feels fine and there isnt any play.
Okay, so about 2 months ago I suffered the loss of my rear axle. The G80 locker in my 97 suburban failed while I was going about 60KPH and the entire rear end locked up, ujoints broke off the yoke and driveshaft hit the ground. I changed both ujoints, put in a new rear end, and while it was...
97' suburban 5.7 with 3.42, if i baby it on the highway I can almost get 18MPG (90kph at 1400rpm FTW). City driving I can sometimes get 8MPG, I just really like the sound of my exhaust c: