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I like building awd remote controlled cars in middle and small scale. Building big scale cars take much time and details. And the second problem of big scale - it cant drive duo to high weight. My Middle scaled mods/mocs of 9395 and 8081 have very simple transmission with diffs, that cannot be locked. Now i am going to make new middle-scale chassis using new 2xL motors with some advanced features: 1) live axles 2) possibilty to run fast or slow with more torque 3) lockable rear diff 4) awd/ rwd switcher (not realized yet) 5) wide of axles 13-15 studs max. In my mind middle scale is 62,20 wheels or 68,8 balloons. Iam going to build on my chassis scale model look cars. But first I want to develop strong and effective chassis. First I began from rear axle. As you can see diff can be locked. Next step was making middle part with motors and gearbox. After that front axle appeared. For now I have: Front axle suspension kinematics needs improvements Up p: motors work from 12 to 20 teeth At the bottom L shaped black liftarm - is gearbox gear holder. After previous gear (12:20 from motors) next gear can be manually selected again 12:20 or back 20:12. Low and high modes. Low gear mode for obstacles High gear mode for faster speed Changing gear stage: L liftarm is dismounted, after that I move 12 and 20 gears on the axle left or right for needed gear, and then fix gear by L liftarm. I have made some test with big (96's) and small (62 and 68) wheels. transmission is strong with such big tires, so I hope it will be strong enough for 1 kg weight (with body) with fsmaller tires. Dromt wheels dpfall down because U joint axles is too short to hold such big and heavy tires, but good for 62 and 68 [/img]