This is a replacement Align 180 Tooth Autorotation Tail Drive Gear, and is intended for use with the Align T-Rex 550E, 600E and 600N helicopters.
Note: In order to use this tail drive gear on a T-REX 550, the helicopter must be equipped with the straight-cut gear setup. To determine if your helicopter uses slanted gears or straight-cut gears, observe the main drive gear which will either have slanted or straight-cut teeth. Additionally, this gear must be used with the "new" Main Gear Case Set (AGNHN6064BA).
This product was added to our catalog on July 14, 2011.