sorry guys there is a u-joint in the middle of the drive shaft, next to the support bearing, i have replaced mine to a stronger one,,
find a drive shaft/axle/ rear end shop they can replace it ,,,it is a hard u-joint to find. I will see if i still have the part number. nope no p/n,, remember the srt6 drive shaft is different from the limited drive shaft (they don't interchange)

you can see the two notches on one of the shaft and one notch on the other,, those have have to match or the shaft is OUT OF BALANCE