Thread: Possible Transmission Problem?

So the shaft comes out with the pulley too? That's what I'm trying to figure out lol. Sorry for the stupid questions, I'm tired and can't figure it. I can only think that I'd have to replace the pulley and shaft to make a difference. Because replacing a pulley that doesn't have a bearing just doesn't seem like a fix to me.

Is this the only pulley know to go bad and where can you get the pulley? Is it just a replacement pulley or an after market one, my trucks been doin just about the same thing

Originally Posted by joshpickworth

Is this the only pulley know to go bad and where can you get the pulley? Is it just a replacement pulley or an after market one, my trucks been doin just about the same thing

if you get a aftermarket one you have to turn it 180" or it will rub on the timing case and make awful noises ( I did it to my truck and I almost puked from it sounding so bad

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Originally Posted by joshpickworth

Is this the only pulley know to go bad and where can you get the pulley? Is it just a replacement pulley or an after market one, my trucks been doin just about the same thing

Rockauto.com has the Motorcraft one for like $16 or $17.

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Originally Posted by Grabber70Mach

My understanding is the pulley is a tapered fit onto the shaft that is permanently a part of the alternator. Thus it has the potential to slip under specific conditions. When your transmission shifts your engine decreases in rpms, that presents a condition when this occurs. Ford apparently discovered this and resolved the issue by installing pullies with a built in clutch that only will spin the alternator in one direction (the direction the belt spins it) but will slip purposely in the opposite direction so the squealing is alleviated. This occurs when the transmission shifts and lowers the rpms thus creating a load in the opposite direction on the alternator the clutch now allows the alternator to freely spin down without making a noise by slipping on the belt. This is the "new" pulley he refers to you installing.

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Alright, now I get it. Thanks Grabber, I just couldn't see how a pulley without a bearing was slipping but that makes sense then. Do you happen to know what year they implemented the fix? And do you happen to know that if I buy a new Motorcraft pulley now from Rockauto of Fordparts.com that it'll be the one with the clutch?

You can ID the pulley by the way it looks. Let me find a pix.


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Awesome thanks Alfie and Grabber

Originally Posted by RhinoZ24

Rockauto.com has the Motorcraft one for like $16 or $17.

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Alright, now I get it. Thanks Grabber, I just couldn't see how a pulley without a bearing was slipping but that makes sense then. Do you happen to know what year they implemented the fix? And do you happen to know that if I buy a new Motorcraft pulley now from Rockauto of Fordparts.com that it'll be the one with the clutch?

Your Welcome, I cannot answer your questions, you'll have to rely on a higher authority, Alfie. 😊

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Haha its all good, you helped me understand how it worked and what was wrong and that's what I needed. And Alfie of course helped a lot too, I just need the part number so I can order it and fix it. And if it helps Alfie, it's a 2005 Ford F-150 4.6L 2V V8 SOHC.

Don't think ford sells them by them selfs. I haven't done the conversion my self just know people have. My car was made with it. .


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