i need to replace the alternator in my dodge truck but i got a few questions like first of all how can you find out what ampage alternator is this the number that is mine : TN12000-0470 AND 90HS PLUS IN BIG NUMBERS 8647 so i am wondering is it a 90 AMP because it say 90 hs is that what it means? and i am wondering will it be a bad idea to replace it with a 120 amp if it is a 90 AMP

 

Welcome to the site. Do not replace with a higher amp number, but you can use a lower amp such as 80 or 70. I will move this thread to the second generation Ram section,
FF

 

Welcome to the site

 

dont replace it! rebulid it. most of the time it is the brushes that are bad. i rebuild mine on every vehicle i own. costs around 25 bucks. and very simple!!

 

^Psh, bigger is better.

Looking at the 96 factory service manual:
type P/N Rated SAE AMPS Engine Min. Test Amps
DENSO 53008646 81 3.9L/5.2L/5.9L 75
DENSO 53008647 117 3.9L/5.2L/5.9L 90
DENSO 53008651 136 3.9L/5.2L/5.9L 120


Thats your part numbers right there.
I find it interesting how the later trucks came only with 117 and 136 amp alts.

Happy hunting.

 

i agree bigger is better lol well in the case of my alternator that is lol and thanks for the part number i know which one is mine now
DENSO 53008647 117 3.9L/5.2L/5.9L 90 this is what my amp is i am going to replace it with the bigger if it is not much more than getting the same size amp so will see am still looking around so far and haven't really had the time this week to mess with it hopefully get to it next week some time