I'm having trouble with a '99 Venture 600 w/reverse. Today after backing-up and switching to forward my sled would not move, no grinding or any noises. Move lever to reverse and forward trying and nothing any way. Checked the belt and everything seemed good, then I tried turning the secondary by hand and noticed about 3 inches of free rotation back and forth, regardless of being in forward or reverse. Finally the sled started to move, drove it home, seemed ok, no weird noises or anything, but, the secondary still has that 3 inches of free rotation, that don't seem good. Any ideas, or comon problems?? I'm wondering about a broken chain tensioner? Any help would be greatly appreciated!?!