Haven't cracked the case yet, but pretty sure I smoked some gears in the tranny. I pulled the motor this weekend, and am having a buddy look at it this week. I think it may be the reverse bevel gear. I heard there are some known issues with that thing. That makes one top end, and one tranny so far. It ran great when I up graded the top end to the 670 kit, high comp piston and stage 2 cam. I think it will be fine after the gear(s) that are broken get replaced. Then it is going up for sale so I can get the new 1000 I reserved.......................