seems to be some slop in the rear end area when doing hard acceleration from a stand still. How can I narrow this down to a cv joint, or U joint or rear end, or the transmission. Nothing is noticebly wrong there meaning no leaking boots or seals or noticeable play in any of the areas I mentioned. Need some hints please. Thanks in advance....

 

Some more info would be helpful. You say there is no noticeable play but you also say there is slop in the rear end. What makes you think this. You could put the quad up on a stand and fiddle with it to see if anything seems out of whack. Maybe you can describe what is happening that makes you think there is a problem.