LonestarTX

Having similar issue but getting worse. Between 39-45 mph, foot off the gas a hair under 1000 rpm then into acceleration, the rear end locks up for about 1 second and will screech locked tires. This only happens when transmission fluid temp is above 150 degrees. Also rumbles and skips at times. Has happened at 63 mph before. Scares the crap out ya when you’re not expecting it. Waiting for loaner from dealership so they can fix. Fingers crossed.