Dodge cummins 3500 2012 longhorn

Hey guys, I'm running a 2012 dodge cummins 3500. Well
I'm having trouble with my transmission. It's a 68rfe. I
drove it the day before and the gears were shifting great.
My dad got stuck the other day and I tried to pull him out
in reverse cause that's the only way I could get in to
where he was. I put it in 4wd and tried to pull him out. But
wouldn't budge. The truck went up to 4500 rpms. Now it
won't move at all. It's like something locked up. Or it may
be the input shaft but I hear no noises coming from the
transmission. I put it in drive and rev it up and it barley
moves. I put it in reverse and it tries to move forward. So if
I can get some answers on here it would be greatly
appreciated.