b44 diff/slipper or summot else

[pizzaman]

thought id blew my esc up as some ppl saw. wen i have got home ive tryed it an this is what is happenin an what ive done.tightened rear diff which now if i hold front right wheel and hold slipper then try to turn rear left wheel all that is happenin is the left rear wheel is spinnin in oppersite direction(im sure when evo set it it didnt do that) also when switched on if i throttle all that happens is the light on the esc (lrp comp) change like they should but nothing happens but if i give the car a little push it runs ok but there is a horrible grinding and noise coming from somewere also car seem to be jerking slightly.
any help be great
cheer peeps