Are you running with the body on? That adds a little protection for the shock tower.

Other than that, try landing wheels down

I don't know what the jump is about, but either abandon it, change it somehow, or modify how you're hitting it. (slower, faster, on throttle, off throttle.)

Which way is it going over? Forwards? Perhaps when you hit the ramp, the chassis is slapping down and then the suspension is rebounding, flipping you over. Try putting the jump at the top of a slope or hill, so that the car is changing its attitude more gradually.

You could also try letting off the throttle as you hit the ramp, then giving it a blip in the air to try and stop the rotation. 2wd and small tires doesn't give you a ton of attitude control in the air, but you have some. Bigger, heavier rear tires will give you more, but i'm not sure how much more. Maybe folks with mashers can chime in here with some idea.

The best jumps have a progressive (curved) slope, to ease the truck into the ramp. I built a small one (only about 12" high, but about 24" long) and my evader jumped quite nice on it. Around 6+ feet of air, and lots of distance. Much fun.