alright guys, i just finished my clutch install, took it for a test drive, now there's a slight vibration when coming to a stop, and when i am taking off in 1st gear from a stop, and when i leave the truck in 3rd or 4th gear slowly coming to a stop it starts vibrating/stuttering pretty bad, the symptom is kind of like you're first time trying to learn how to drive a standard vehicle and the car vibrates and stutters and then dies in first gear. other than that, the clutch shifts and goes into gear smoothly. the only thing i can think of that could be causing this is the driveshaft. i probably didn't align right or something. any ideas guys? the truck was fine before the clutch job.

vehicle is a '90 4x4 3.0 v6 5spd