I am new here and hoping that someone can help me out on this one. Not long ago I started having a sever shake in my 1994 F150 with the 4.9l and a 5 speed manual. Well it only shook when I would start from a dead stop on level ground or going up hill, down hill I would let it roll a little then let the clutch out and it was fine. There is no shaking at any other time. It shook so bad that it broke the tranny so I just replaced it while I had the tranny out I replaced the clutch disk, slave cylinder and hydro line, new tranny mount and new U-joints in the rear driveshaft, havent hooked up the front yet. It got all back together and it started doing the same thing again, so I just replaced the motor mounts, they where busted too. That didnt stop it either. Can someone point me in the right direction??

Thanks for any help on this one.