Hey guys this is my first post here hope you can help. 1999 4wd. trans starting making a slight whining sound about 2weeks ago,and today i put it in reverse to leave my driveway and NOTHING. it didnt move a bit and i could here whine or squeel when i hit the gas but no movement. I put it in drive it moved foward but since i was next to house i could only pull up so far. trk has 134k on it and the fluid level is good. what could it be and how exspensive if i need to rebuild?