Hey guys, I got a 2000/4.6 4x4. My forward clutches went bad, and my father decided in the long run it was best to rebuild the entire transmission. It was doing great, but than all of a sudden leaving work yesterday I put it in reverse, and the truck is barely moving but revs really high. I'm hoping there's not already a problem with the reverse clutch pack or the reverse band. Once or twice it would seem to catch and fully engage in reverse, but not often. Any ideas?

 

Also, when reverse catches more like it should, the entire truck starts to bounce. All other gears work great though