Hot racing driveshafts flop around like fish out of water

[Machztechplus]

Ive had hotracing steel driveshafts for years. They have always been kinda floppy but since im not going to be running my new electronics through snow too much this winter I figured I could work on some smaller things this winter. Does anyone know why the driveshafts wobble so much?? Do the stock ones do it? is is possible that its the diff? the diff output shafts seem a bit wobely as well.

thanks

 

[WithinU]

Define "floppy" and or "wobely". Where are they floppy at? Could be worn out hubs, or you may be missing the washer or spacer that goes between the axle and hub, and or on both sides?