Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
I have an '84 K5 with 400 small block,700r4, and 3.73 gears running 33's. I was leaving work and I got in to it enough to break the tires loose. They caught before I was through the intersection and about 1/2 block later I felt a big BANG, felt like someone assholed me, I stopped cause I have a bed u-joint and figured that was what it was. It wasn't, I'm thinking that it is the spider gears, driving down the road it makes a real loud clunking sound. Of Course I took it out of action immedately. I going to pull the rear diff. cover off tomarrow afternoon to check it out.
The spider gears aren't spinning while the truck is going in a straight line. They're just along for the ride until differentiation is required. My guess is that you broke a tooth off of the ring gear.
Very common failure mode with the 10 and 12 bolt rear ends.
