Hmmm... Well, I'll call Dodge and see if they can tell me which I have installed. I bought the 150-amp alternator and kept it on a shelf for a few months before swapping it out with the original .. a 150-amp alternator! Yep! After fighting to remove the alternator without removing everything you are supposed to remove prior to REMOVING the alternator, I discovered that my Sprinter CAME WITH the 150-amp alternator!
So, I put the new one in anyway, and the original sits on my shelf with 52,000 miles on it, awaiting failure of my NEW unit. At least I won't have to wait for a replacement, if and when the new one fails!
Anyway, I called the dealer and gave them my VIN number, and he said "Your vehicle is equipped with the 150-amp alternator..." DUH! One single phone call could have saved me the hour plus of labor swapping out an identical alternator, AND it would have saved me the $289.00 (I think) I paid for the replacement, thinking I was upgrading the power system.
So I figure that he will ALSO be able to tell me what gear ratio my truck has, the DME or DMF. Perhaps THIS time I won't be a DMF and buy something I already have! LOL!