Hey guys new to the forum. I have a 1996 powerstroke f superduty 5 spd. I having some overcharging issues. I noticed my gauge when started stays on 8 in the red and the longer i drive the higher it gets til pegged out on 18 in the red put a new alternator and load tested the batteries, and still same problem. Alternator gets pretty hot. Also checked connections. Not quite sure where to go from there. Any suggestions?