Is there a secret to removing the speedometer from the dash. I have popped out the lights, removed the speedometer cable and know that there are three or four screws or bolts of some unknown size and or type that hold the speedometeer in. I have a whole new gauge assembly to install but I can't really see what I am up against. I have the manual but there is no mention of how to remove the defective gauge. The reason I say defective is that the odometer works but the speedometer does not so I bought a complete new speedometer.