overdrive hunting
 

ok guys need some advice. my truck started to hunt for lockup. i did the one that you have to cut and splice the 2 wires and it worked just fine. then it started again and i put in a timbo apps. and it went away for about 2-3 weeks. and it came back. put in a noise filter and it stoped for a few days and now its back. it only does it every so often but its getting annoying. does anyone know what else it could be. i've thought about changing or rebuilding my alt. but i want to know if there is something i can do before i drop the cash for the alt.
thanks