Yep I have flipped....and landed nose first off a pretty big jump. Have not had an issue or hurt anything important.

There is no modification to mount the trans......just the 4 stock screws. No shifting problems at all. Actually when it shifts into 2nd the front wheels want to come off the ground so I lose a little steering while accelerating. I may lock it into second and see what happens.

No modification? Theres pictures of the chassis dremmelled away, I thought that was to fit it in? And those big washer things? I was just curious of how its actually done.

Also, I didn't mean shifting as in gear shifting, I meant since the tranny just looks like its clamped onto the chassis, if they werent tight enough or if you hit it hard enough I imagine the who tranny could move...