As im flying my cx it turns right, and it makes like a glitching sound as its doing it. It is out of control at that point. It only seems to happen when i give it like 75% throttle and up. I replaced both motors thinking i had a bad one but i guess its not the motor. Anyone have this problem or have any ideas?

Not sure what you mean by a 'glitching' sound exactly. Maybe a bad bearing??

Can you take a short video (with sound) of it happening, and post it for us to take a look at?

If the gear on your outer shaft is slipping it can make a screeching sound and reduced lift under heavy throttle. I used black CA cement to lock the gear in place and no more slippage.

Did you possibly have a crash with it?? Maybe youre missing some teeth on one of the gears

how do u put a video on here?

here is a quick video clip i can make a better one if this is not good enough. http://media.putfile.com/blade-cx-43

I dont know about you guys but that sounds like a bad motor.Or 1 getting ready to seize up. How long have you had the CX and about how many hours on the motors??

Ok NM that last guess cuz you said you replaced em. Have you checked your main gears for missing teeth??? Or maybe is your gear mesh a little too tight??

That sounds to me like either a bad bearing, or a shaft slipping inside a gear.

Forgot to mention this: Remove 1 motor plug from the 4 in 1, then run it full throttle while holding it down. Do this for each motor until you find the one that has the problem. Then, inspect every part that turns that rotor.

This sounds very much to me like a shaft slipping. Once you find which rotor is causing it, hold the corresponding gear with one hand, and gently but firmly try to turn the rotor with your other hand. See if you can make it slip. If you can, something's not tightened down somewhere. Check everything...

Ok it is the lower blade that is slipping, i tighten the set screws for the lower blade but i guess it isnt tight enough, i didnt install it correctly

Is it the blade that spinning or is it maybe the gear spinning on the shaft?? I dont have a CX here to consult but isnt the upper gear the one that controls the lower rotors??? If it is (guessing again) I also think that gear is a pressed fit onto the shaft. Theres no way to tighten this 1. You need to replace the shaft and gear. Like a 10 dollar fix. Like I saidd Im just guessing here cuz I no longer have my CX. Anyone else wanna double check what im talking about plz?

its fixed!! what happened was i didnt have the lower blade on the shaft correctly... where the little screw goes in, i didnt have it in the hole on the shaft, stupid mistake but having all of you guys input helped me figure this out... i dont fly the cx much because i have a cp but i moved by the intercoastal and its too windy over here to just go outside, so now im flying the cx and the simulator to keep up. So thanks for all of your help.