problem with xray t3
 

i race indoors on carpet with t3 last club night car was undriveable when on 50-100 % acceloration would just spin out from rear and do a 360 tyres are new people from club came to help saying rear ball diff was to loose and slipping tightened up but came loose again straight away borrowed a rear ball diff from a mate at club night car was still doing the same all through the 4 heats car was checked for tweak and camber etc but still made no difference when i got home stripped car down found one of the front axle driveshaft adapters was loose on front solid axle tried to tightened up but screw thread was no good so i have ordered new front solid axle and rear ball diff will these sort out the full power problem of spinning out or can it be something else ? thanks for any replys