Originally Posted by
Scrodzilla
The GXP system consists of two external bearing cups, a spindle attached to the drive side crank arm that passes through their center and a non-drive side crank arm holding it all together. There would be no way for any of it to "slip".
Usually when people think something is wrong with their BB, it turns out their cog/lockring is loose.
i have had this happen to me too. however, i was using speedplays. so it turned out when i pushed off i lifted my back wheel slightly, making it feel like slipping. although i didnt experience squeaking. is it possible you lifted the rear by accident?