I'm getting ready to install the transmission on my 57. The the installation instructions that came with the new clutch disk I bought states: Never preform a live clutch test (engine running) with the wheels off the ground. The backlash effect of the unloaded driveline could bend the drive straps of the pressure plate causing poor or no release and/or chatter upon engagement. I want to test the transmission after I install it. Right now I only have the engine on the frame. I do run the engine and the driveline is not installed yet. I want to know how to test the transmission without causing the damage mentioned above.