i've speculated myself and have heard alot but want to know what you guys think about this. while driving at any speed i get a shutter during slow acceleration from some component in the drive line. when i get to 80mph+ (only on track) it shakes bad. not the whole truck like a bent frame shake but something in the drivetrain. it has also smoked only at high speeds while shaking i dont know if its motor oil or trans fluid but the oil touches something hot enough to make it burn. when coasting under 25mph there is a loud clicking noise coming from the rear. and when i try and reverse there will be a few loud clicks.
Dude im puzzled. I wish i could help. I get some hooping/shuttering with excelleration from the rear like wheel hop. Nothin like you though. Im sure someone here can think of a few things to check. Most def..good luck.
Edd's : Hemi/ K&N C.A.I BONES Edition / Roll pan/Hood scoop/ Tinted heads,tails,3rd brake/ stereo upgrade/ T.M.D front bumper cover /Painted interior, 5" rear flip.2 inch front drop coils, Painted calipers,Eye brows
Any idea at all where the smoke is coming from? Check the fluid levels in your trans, transfer if it's a 4X4, and rear axle. I'd also be tempted to remove the drive shaft (don't forget to mark the shaft and yokes for proper reassembly) and make sure the u-joints move freely. If you've driven it a few miles before you do this, a u-joint cap that is hotter than the rest will indicate a lack of lubrication to that part of the joint. While you have it out, check both the yokes for any excessive movement.