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I have a 1986 f150 2wd with the 351w and i believe my alternator is failing the problem I’m running into is that my alternator is a 2 groove pulley and also internally regulated with 2 plugs on the back I cannot find one in any of the part stores i believe it has been discontinued I thought about having it rebuilt or pulley swapping it with a single grove alternator any suggestions?
I believe and it sounds like you have a 2G (fire starter / FS) ALT
1 of the plugs would not make a good connection heat up, melt the wires and catch fire.
Because of this any new / rebuilt ALT has this plug built into the ALT and is no longer a "plug in"
So some cutting of wires is needed and there is some information in here on this.
As for the pulley just swap them over, this is normal.
An impac will take the nut off and on. If you dont have a 1/2" one, good time to buy one from HF.
The electric one I just got works great when I had to pull a tire on a trailer and did not want to run air hose out to it and use my air power one.
I also got a 3/8" impac driver for smaller jobs.
Dave ----
As much as it pains me to do so, I must agree with Dave. Don't worry about the pulley. With an impact gun (and possibly a puller), it should be no big deal to swap your existing pulley to the new alternator.
Here's my newer 2g from NAPA, with new connector. Advanced tested the old one and told me NAPA had for me. Make sure they only sell you the newer style connector, They may offer you the old style.
Bring the old Alt with you, they will change over the pulley if needed.
If you need, that should help. Notice "C186" for the regulator is wired differently then on my 86 302EFI. When I put the new connector on, I kept the same hookup as from the factory.
The two guys above are a couple of the "go to guys" here's. This place is great because of members like them. You have to be careful with Karl, praise will go to his head...
