Looking for diagnostic help. When I brake, I get a clunking (or slight popping) with a frequency of about the tires turning. I'm 90% sure its coming from the rear axle. Its more prevalent with light braking. The truck has a recent rebuilt rear diff (I did the pillow block and it might have been tight), new OEM drums, new-ish brake cylinders and pads (Cruiser Outfitters, IIRC), new leaf springs and u-bolts (RuffStuff).
I took the tires off a bit ago and looked the brakes over, everything looked ok, and again adjusted them. I know my driveshaft is worn, so I pulled that and went driving. The clunking (only during braking) remains, but I can feel it slightly less. I attribute that to the drivetrain not transferring the noise. That eliminates the driveshaft and transfer case (I think). The u-bolts are at a steading 100 ftlbs (weight off axle). So I don't think the axle is shifting on the new springs. The truck drives fine so I tend not to think diff. Nothing leaks (either brake or axle fluid) nor is anything contaminated with oil. The rear brakes are adjusted using the factory procedures. Fronts are disks.
The only other "odd" thing with the rear brakes is if I spin the wheels, they each drag a bit at a "high spot". Originally I had my old drums turned and they still did this. So I bought new OEM drums, but no change. No weird noises, vibrations, or leaks from the rear axle but I hope its not bent some how. The clunking is a more recent development, so I don't think its old damage, but anything is possible.
Could it be the diff loading up during braking if my pillow block is tight? Pull the drums off again? Drain the diff fluid for a looksey?
I took the tires off a bit ago and looked the brakes over, everything looked ok, and again adjusted them. I know my driveshaft is worn, so I pulled that and went driving. The clunking (only during braking) remains, but I can feel it slightly less. I attribute that to the drivetrain not transferring the noise. That eliminates the driveshaft and transfer case (I think). The u-bolts are at a steading 100 ftlbs (weight off axle). So I don't think the axle is shifting on the new springs. The truck drives fine so I tend not to think diff. Nothing leaks (either brake or axle fluid) nor is anything contaminated with oil. The rear brakes are adjusted using the factory procedures. Fronts are disks.
The only other "odd" thing with the rear brakes is if I spin the wheels, they each drag a bit at a "high spot". Originally I had my old drums turned and they still did this. So I bought new OEM drums, but no change. No weird noises, vibrations, or leaks from the rear axle but I hope its not bent some how. The clunking is a more recent development, so I don't think its old damage, but anything is possible.
Could it be the diff loading up during braking if my pillow block is tight? Pull the drums off again? Drain the diff fluid for a looksey?