Mine did the same thing when I hit the brakes, it would klunk repeatedly until I let off the brakes. It sounded like the axles moving in and out. I took the drums off and looked around and everything looked ok, put the drums back on and it hasn't done it since. Go figure!
Mike Harris
First thing to check (right away) is your u-bolts. Then check the lug nuts and brake caliper bolts. If that doesn't come up with anything, then make sure the driveline splines are greased and not binding.
Thanx, I'll check into the caliper bolts and drive line splines. I have a feeling it's the drive line splines. I recently pulled the shaft and didn't grease the splines when I reistalled it. No grease on the trail.