My 09 SG feels like the belt is slipping which I don't think it is, when I accelerate hard in the low gears it's like the tire is trying to break loose, not sure whats going on here, in the high gears it doesn't seem to do it. Any advise??

 

The symptoms of a clutch slipping usually first appear in the higher gears so u can probably assume ur clutch is good. I'd inspect the rear pulley/belt tension/axle nut. Although a bit more difficult it might be a good idea to inspect the front pulley, ensuring that it is tight.