Originally Posted by early 99 pwrstroke
They are new from Napa.
Sent from my C771 using AutoGuide.Com Free App
Really... I haven't heard too many problems with them. I know there has been some problems with the rebuilt units, but not the new ones. I put a new Napa one on my truck last December. Almost 4k on it, still holds ~14.5-14.7v at idle.
You could go with a high output alt, but the most I've seen is a 2 year warranty and I have heard quite a few cases of them not lasting. I believe the large case ones are better. I assume you at least have a lifetime warranty?
How old are your batteries? Bad batteries can eat an alternator... I've heard of a few people adding an extra ground from each battery to the frame.
Originally Posted by Autofair Diesel parts
I wanted to go OEM... My dealer quoted me almost 3x the price as one with a lifetime warranty.
To be fair though, the OEM one did last 12 years and almost 100k miles. Of course I'm sure your prices are better than that!