What would be the best replacement/ rebuild for an alternator that seems to have an interment electrical leak
Hi Amp/ HD preferable
Can change brackets if necessary

 

Napa is good for quality. Most places have a 120amp alt where most stock alt is probably 90amps.

I will move this to the 1st Generation Dakota sub-forum.

 

someone told me that installing a higher amp alt. can burn up the pcm. is that true?

 

If it is too high yes you can. But 120 is what some Dakotas came stock with. Mine did I'm assuming it might be part of the stock towing package.

 

i put a 120 on myne last year with no problems. it pumps out alott more power than the old 90 did.

 

Mine is 120amp already
Nippondenso
Do you like later Bosch better?
My re-builder thinks its worth it to change
Agree- should not hurt pcm
I have larger cables already

 

i honestly don't care who made it as long as it's 120+ and the reason some ppl toast the pcm with super high output alts is that it is programmed for up to 150 amps or so. that's the max i have found a/m for these.
if you just have to have a 300 amp duel alt setup then you would need to just change over to a external regulator and take that load away from the pcm. also the bigger the alt you run the bigger the bat you need. this is because it can charge and rapidly over charge when the bat is to small or has a dead cell. that's part of what makes pcm die from it. the other is that the field coils require more current to to go full field. i don't think that it is the latter although i can think of a really good way around it.
oh upgrade your wires from the alt to the bat and from bat ground to ground. they kinda sucked already.

 

Pulled it apart today
Brushes almost gone
Got out the spare- brushes only slightly better
would short brushes give field leak code?
5:00 to late to get brushes today- oh well
I looked for a Durango alternator but could not find one
120's plentiful in the yard

 

If your wanting a 120 you could always have it rebuilt and bumped up to a 120.

 

Alternator was already 120
soldering in new brushes
a note
there are 3 pin and 2 pin brush holders
lucky me I have one of each
of course the one with the good brushes was the wrong one for my alternator