Hi, I have a problem with my Savage SS truck. I have tuned the engine correctly and when the truck is elevated so the wheels are off the ground it seems to be running fine. However when I put the truck on the ground to run it the engine continues to run, the throttle works fine and the gear on the slipper clutch turns but the truck doesnt move. I checked the brakes and they are not engaged. Basically the engines works, has been tuned correctly (hopefully) and the gears on both the engine and the slipper clutch are turning but the truck just wont move. What is the problem? Do I need to retension my slipper clutch? What does the slipper clutch do anyway? Sorry but a I am new at this. Any help would be great.