Shaking/Vibration from stop
 

My truck vibrates/shakes when I let the clutch out/accelerate from a dead stop. It does not do it when shifting gears or cruising. I just replaced the clutch and all associated components about 1,000 miles ago. I cannot feel any vibes in the clutch pedal or gas pedal. The shaking is pretty significant, makes the whole truck rattle and is noticeable watching the truck from behind. I've checked and greased the u-joints and they don't have any play, the center support bearing has about a 1/2 inch of play. I was thinking it could be the u-joints in the cardan joint or maybe even a flange bearing. I'm pretty mechanically inclined but I've never messed with drive shaft components, any insight, advice, or tips before I take it to a mechanic would be appreciated. Thanks in advance.

When you replaced the clutch, did you have the flywheel machined/replaced? If not, it could have hotspots in it, causing chatter. That, or the clutch disc could have been contaminated with oil somehow. When I did my first clutch in my T, I used a factory toyota clutch. Toyota ships their pressure plates soaked in oil to prevent rust, which I continently forgot. Just about 1000 miles later, the clutch started chattering. I was able to minimize it by removing the boot around the shift fork and blasting brake cleaner into the clutch with it running, but like I said, this only minimized it. I had to do another clutch after 30k of it chattering on take off.

I wouldn't suspect a u-joint because usually, you would feel the vibration at higher speeds, not on takeoff.