Hi guys so I have been experiencing a clunking feeling when I leave a red light. Only does this upon medium to heavy throttle, I crawled underneath and tried to shake both driveshafts however there was no play... this was in park with the truck off. Is there a trick to checking ujoints? I feel it in the floorboard and it’s best described as a clunking/slight clicking feeling. Almost like something sliding around the bed or inside truck. I also hear an audible clunking when shifting to reverse or back to drive, but not into park. Any ideas or tips on diagnosing this one? Thank you in advance.