alternator overcharging ? help

[moparstuart]

Last sunday coming back from a two hour drive to a show my alternator started discharging and making a slight bearing noise . at speed it would still charge some but at idle it was discharging . Ok so i get a new one and now its great at idle , but at speed the gauge is off the charts over charging ? Is this a bad alternator or has my regulator fried and is not regulating it correctly Huh
the alternators have life time warrantys but are cheap remans ? Also they are both a 78 amp to accomidate my new power accessories i've added . THis is on a 70 with factory style mopar electronic ignition .

 

[Ron 73]

Sounds more like a voltage regulator gone bad. Im assuming you have tried a different gauge, seems if it were off the charts your battery would be just about boiling.

 

[moparstuart]

After a new voltage reg , checking all the wiring and connections , plugs and grounds . It was still over charging . The gauge would still peg all the way to the right at speed . So i pulled the alternator and got another , all is fine now . The new alternator had a bad field that was grounding out .

New reman stuff out of the box is junk these days , life time warranty a must .