I have a 1966 C-10 short step. I believe the rear end is the original 373 gears. The truck sat for five years before I bought it. After getting it running five years ago, the rear gears made a howling sound at 50 mph. Now, especially when I turn right, there is a loud banging sound coming from the rear end. I looked to see if the springs were seating properly, the u-joints are tight and the u-bolts were intact. All in all the visual inspection everything appears to be normal. In the last month, I had the rear axle seals replaced – and the shop that did the work didn’t note anything unusual. Any ideas why the banging sound is occurring?
