600pro violent tail wobble

[rsmuppet]

Evenining boys and girls i trust your all well?
Ok i spooled up my 600 pro this afternoon to find that it's got a really bad shake which get's worse the more the head spped increases. So obviously no flying , Nothing's changed since the last time i flew it so i'm a little baffled as to what's causing it , i had a little atercation with the brown stuff early last month but only pinion gears and rear blades , Checked the blades and both weight up the same . The only thing i have changed is my TX which is now a PCM9X2 but i can't see this would be related and cause such a violent shake , so far iv'e checked for binding on pinion gears , blades arn't to tight in the grip's (mains and tail ) checked the main shaft bolt isn't over tight . I'm about to strip the whole thing down and rebuild it but if anyone has any ideas please chuck them out there ,

[pgkevet]

Blade weight/ blade balance. Grip thrust bearing reversed
Pinion bearings
Missing tooth on front lower torque gear
Cracked frame near baring mount
Loose lower frame/skid mounting block, missing screw(s)
Mainshaft bearings


..more or less in that order

[buckers]

If you've changed your tranny, are you sure that the gyro gain is as it was? Could it have been increased on the new tranny and you not notice it?
HTH

[rsmuppet]

Right 99% sure iv'e tracked the problem down , i had the gyro gain in AUX1 instead of AUX2 stupid boy . I'll try again and see what comes of it . Cheers for the help