FORD F150 5.4 supercrew whinning/whistling under cold temperatures

[motleyphuckincrue]

My 06' 4.6L does it occasionaly. Now I know lol

[tranvanjohnny]

omfg i have the same problem when im going 60km/h what is it?

[xosgoodx30]

My truck does that exact noise! Please if you have fixed it could you tell me what it was? Thanks a bunch!

[dan43213]

My 2008 V6 does it, only when cold...

[glaurenc]

it is the alternator bearing. It is no big deal. Change it only if you cant stand the noise at the rpms at real cold temps. My 2004 f150 lariat has been doing that since new and now has 130k miles. really not an issue

[JrPilk]

Hey was the alternator the problem. Please let mo know because my truck is making the exact same sound!! Thank you

[blakex1997]

Hey if you could tell me the cause of the noise ill have to get what ever does that fixed on my truck

[ryancoutu]

Thanks I really appreciate it

[ryancoutu]

My ford has the problem!!! Did changing the alternator fix the problem??

[frankyflo]

@ryancoutu Haven't change it yet but i'll let you know as soon as i do

[DreamBind]

Sounds like a plane! awesome !

[Danthevicman2]

hey thats what my 97 f150 does and my dads 05 F150 im come to the conclusion that its the alternator bearings from what ive been reading on the forums.

[dbn0922]

I have the same frickin noise in my 04' F-150 Lariat! Did you find out what was the problem or does anyone else know what that is?

[frankyflo]

@dbn0922 I haven't found out exactly what causing this but some people i know told me it was probably the alternator rear bearing. They said it's a common problem with all F150 that have some wear. :o(