Like the title says, all three of those lights come on at the same. It happens when revving the motor high and disappears immediately once the rpms drop again. Im not sure exactly which rpm though since my van does not have a tachometer. It happens both in nuetral and in gear, though i havent tested each gear as im not really keen to go out and rev it up to 5 or 6k in 5th. I have a mechanical oil pressure guage and pressure is fine when this happens so im betting that the other two lights coming on are not because they are actually low like the lights would indicate. does anyone have any suggestions on what could cause this, or have had the same issue? btw its an 87 4wd manual, not sure if that matters with an engine issue like this.