My Dad's been driving my '98 K2500 for a couple months while his truck was getting fixed up. Today he called me and said the rear blew something out the diff cover and locked up while he was driving it. Won't know for sure what went til I get it opened up, but I'm anticipating the worst and that I'll need a donor axle so I'm gonna start hitting the yards around here. Truck is a 1998 K2500 8-lug with the 8600lb GVWR and the big rear brakes. What other years/models fit? Do the 2500 8-lug suburbans also have the same rear? Did some come with 8-lug but not the big brakes, and can I swap the brakes? Brakes were all new in the rear last year, so I'm planning to swap the brake parts over anyway.