6 alternators so far.
2000 tracker ,1.6 engine,4wd,manual trans. Replaced alternator 6 times.charges from 13.5v to 14v . after about 1 week it starts to raise the voltage. it will go up to 18 volts and then goes down to 10v or 9 v. when I put another one in it will do the same thing. I have put 2 new batteries in but it still does the same. Before it fails I feel the alt.back and it is very hot.