Jandk

Do any of you knowledgeable Oldsmobile experts know which alternator My 1964 Oldsmobile 98 have been fitted with??

It is the original ext regulated alternator. I have looked for stamped numbers and so, but cant find anything thats tells me what alternator it is. I have looked in the service manual, but cant anything I understand.

I guess RockAuto could supplie a new one together with my new purchase.

Any help is much appriciated.... Thanks

oddball

It should be a typical GM 10DN alternator. Reman units normally have smudged, removed, or no stampings like the original units.

Rock Auto has a selection of reman replacements.

Now, if you want a numbers-matching replacement for originality, place a parts wanted ad and see what shows up. I'm sure someone on here has an original application list for your car.

Jandk

Numbers matching wont be neccessary.
I will have a look at Rock Auto for 10DN unit.

Thank you Oddball

joe_padavano

Just out of curiosity, what numbers "match" on an alternator. I'm sure you mean "correct" and proper date code, but unlike VIN derivative stamps that prove originality of a block or trans case, there's no such thing as a "numbers matching" alternator. The difference is that there will be thousands of potentially correct alternators, but only one original numbers matching block.

Jandk

If I should be tempted to go for a more than 55Amp alternator, and still a DN10 as you say is the correct one, which cars would have like a 60-70Amp alternator fitted??

joe_padavano

The 1972 Olds Ninety Eights used a 10DN style (external regulator) alternator rated at 63 amps. It will bolt in place of your current one. RockAuto sells version with a one-groove and a two-groove pulley.

Jandk

Thank you sir... Very very nice. I did try searching RockAuto, I didnt have any luck. I do not think the RockAuto parts search function works very well.

oddball

s/match/correct/