No, it is fine the way it is. Anything from 4 degrees up to 7 degrees will work. the six degrees is considered "optimum" and that is the kingpin inclination. Even though your crossmember is setting at 4 1/2 degrees, there is still enought "slop" in the fit between the beam axle, the spring shackles, the spring, and the crossmember to monkey the axle a bit more or less without putting the front spring into a "bind" situation. You'll be fine the way it is.---brian