Original Name / Part No.: 8290Part location: Main gear upper caseProduct major functions & usage:1. Stabilize motor, adjust the distance between motor gear and main gear.2. To protect the motor and main gear from impact and dust.Is this part adjustable? If yes ¡¦ how and why/purpose?YESHow: Fix the motor on different positioning holes according to different gears.Purpose: Adjust the appropriate gear spacing.Accessories:Motor Mount 1pcSpur Gear Case Cover 1pcCooling Fan Base 2pcsCooling Fan Lid 1pcCoolig Fan 1pcPlug Adapter 1pcStainless Steel Flat Head Screw 3x18 4pcsStainless Steel Button Head Screw 3x12 2pcsStainless Steel Flat Head Screw 3x8 2pcsStainless Steel Round Head Screw 3x8 2pcsStainless Steel Round Head Screw 3x6 1pcStainless Steel Set Screw 3x4 1pcMajor advantages of upgrading to this part/product :1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater durability and protection. The motor mount and the main gear cover are integrated into one-piece design, which is more stable and will not be shaken due to the violent vibration of the motor.2. Motor mount designed with heat sink fin for fast cool down. Made with extra thickness moves the motor forward by 3mm as well as the gravity to benefit crawling.3. A cooling fan on top brings a double cooling effect on the motor.Other special notes and comments:Suitable for TRAXXAS TRX-4 DEFENDER 82056-4, TACTICAL UNIT 82066-4, FORD BRONCO 82046-4, BLAZER 82076-4, MERCEDES-BENZ G 500 82096-4