So I recently just replaced my alternator because my batteries were not getting a full charge. I put on a 140 amp for a replacement my question is the same thing is happening that was before I put a new one on. When I start the truck my volts drop down to around 11.4 and it also seems like it has a hard time turning over because of low voltage. Also when I check my batteries there never over half full and there brand new die hard platinum's so I'm sure its not the batteries. I guess my question is what else could be causing this? Or do I need to try another alternator?