Align has two types of Autorotation Tail Drive Gears and five types of Front Drive Gears for the Trex 700 family.
See the following list.
Autorotation Tail Drive Gears
H70G007XXT Autorotation Tail Drive Gear 104T CCW
H70G012XXT Autorotation Tail Drive Gear 102T CW
Front Drive Gears
H70G001AXT Front Driver Gear 22T Black CW
H7NG001AXT Front Driver Gear 21T Black CW
H70G001BXT Front Driver Gear 22T Red CW
H7NG001BXT Front Driver Gear 21T Red CW
H7NG001NXT Front Driver Gear 23T Red CCW
Note that the CCW Autorotation Tail Drive Gear must be used with CW Front Drive Gears.
And the CW Autorotation Tail Drive Gear must be used with CCW Front Drive Gear.
This applies to Trex760 and Trex800.
See the following list.
Autorotation Tail Drive Gears
H70G007XXT Autorotation Tail Drive Gear 104T CCW
H70G012XXT Autorotation Tail Drive Gear 102T CW
Front Drive Gears
H70G001AXT Front Driver Gear 22T Black CW
H7NG001AXT Front Driver Gear 21T Black CW
H70G001BXT Front Driver Gear 22T Red CW
H7NG001BXT Front Driver Gear 21T Red CW
H7NG001NXT Front Driver Gear 23T Red CCW
Note that the CCW Autorotation Tail Drive Gear must be used with CW Front Drive Gears.
And the CW Autorotation Tail Drive Gear must be used with CCW Front Drive Gear.
This applies to Trex760 and Trex800.