OK well today i went to the rock falls race way to watch the races. With a VICA club to watch the races. When i got back to the i jumped in my 89 f150 and left the started to leave the school parking lot when. dfjhsaf$ my whole truck like locked up as i was turning the corner and there was a loud gut wrenching snapping sound then it broke free and continued to move so in a kind of shock i stupidly kept driving it because it wasnt making noise. I so i shifted up to 4th and the sound came back louder than ever so i stopped and shut the truck off. I started it back up and put it into nuetral and it didnt make the sound. SO i tried to move the on its own power and the sound came back, then i put it into nuetral and when it rolled the sound came back. Im pretty shure its the rear end!

Any ideas on what happened?