It is those stupid self adjusters that will keep adjusting tighter if the drum is out of round just a tad. Being an old guy I grew up with drum brakes and the drums always needed to be turned. Now these stupid ones keep adjusting running hot and hotter until the seals go.
2016 Pinnacle 36 FBTS, washer/drier, Onan 5500, G tires, dual Payne windows.
2019 Ram 3500 Laramie 4x4 LB, DRW, HO Motor 4:10 Air Suspension, 12” Info Center.