I have a 2000 exp 5.4l 4wd with 180k. No worries, just routine stuff. Today I start engine, it whined more than usual then jerked when I put into drive. When I pulled out of driveway, steering was very tight, almost like it was in 4L. I noticed 4x4 light was flashing but 4wd know was in normal position. Then i noticed my speedometer was jumping up to 40-50 mph when I was actually doing 5-10mph. I stopped and put it in reverse, speedometer said I was doing 20-30 (in reverse?). This is a new one on me. My assumption is transmission is done, anhy other thoughts out there? Thanks for the help.