As far as I know O'Reillys replaces it unlimited times. Can't speak for the F150 but the Ford Freestyle seems to have alternators fail more frequently.

 

ok, so i decided to go oem.... the issue is, there are a lot of different part numbers...

all motorcraft:
GLV8781RM
GL8863RM
GL8743RM

i ended up going with the 8781 which i found on ebay "new" for $142... everything else was over $200. hopefully that wont mater? the only thing i can find is that the connector types can be D shaped or oval shaped. amazingly, there isnt squat out there on the web telling me which my truck would be. hoping if it is the opposite, i can splice in the wires somehow.

 

In the future, go to the merchants forum and reach out to TASCA or call them with your VIN, then they can tell you the exact one you need.

 

Here is what you bought, they all appear to be 110 amp remanufactured, yours says "economy":

Economy; RemanMotorcraft® Remanufactured Alternator Highlights Include:

• New OE Voltage Regulators
• New OE Brushes
• Stator – 100% insulation tested to 600 volts
• Rotor – 100% balance and performance tested to 600 volts
• Housings – Unique cleaning process ensures excellent surface finish
• Hardware – Cleaned and replated All OE innovations and upgrades are applied
• Performance and insulation tested to 600 volts, current output, cut-in-speed and high-temperature durab

 

but what does that mean? will it work on my truck and did i waste $ on a crappy one? im assuming the other part numbers have a bit more stuff replaced with new. im mostly just hoping that it has the right plug.

 

I would call and ask Rockauto the difference and which suites yours. Play dumb like you are looking, have your VIN also.

 

thanks, i did exactly that.

issue is, i already purchased. im hoping that if it is the wrong one, ill be able to splice wires direct to the alternator socket to get it home. ghetto, but itll be my only option once im there. i have no idea how ill tell which wire goes to which pin though.

 

So you called Rockauto? What did they tell you? Not sure I would try the wire splice idea unless some one here can guide you!

 

no, i sent a pm to tasca. ill have to try to call rockauto after i get done with work. im really considering buying one of each and returning the one i dont need. just to be safe.

 

BE CAREFUL doing that, some places dont allow a return on electrical parts!