back to the propblem of jumps. The nose will dive for a couple reasons. You would understand this is you rode motocross or if you do it will relate very near. The suspension rebound can cause your truck to dive in the air. as it bottoms out going up the jump face, it unloads as you continue and pushes the rear end up. if you are not giving power it will cause the rear to go higher than the front (endo). By power off the jump I don't mean wide open throttle, the motor needs to be pulling a bit, smooth power delivery. If you are revving out, you will endo for sure. My advice is to start slow and play with the jump. Learn to make it go nose high and learn to make it jump flat with the throttle and or brake. some high speed jumps you need to brake befor eit so you can power off it. some jumps you coast off at even throttle. I use the brake in the air to bring the nose down or hit the throttle to bing the nose up. You watch a supercross rider to this, you see how they correct the bike in the air and almost always apply throtle off the jump face. One more test to try it hit a jump with a long run and the motor reving, see how bad it flies and how far it goes. not get a shorter run and have power left off the jump and see how you can control it on the jump face and in the air. It's hard to explain and takes lots of practice to master jumping. If you practice on a few different shapes and sizes, no jump will surprise.

Good Luck and enjoy the learning.. just be glad your not in their banging you heand on the wheel.