Ok, im getting nervous that the rear end in my 04 F150 is starting to make the howl/hum noise. I thought it was tire noise from my Mastercraft Courser AT's but they arent that aggressive of a tire. I rotated all tires criss crossed, had them balanced, and still have the same hum. Seems to start at about 30-40 and go up, some times the hum sort of pulses like hum, hum,hum, hum, hum. And it increses and decreases in intensity with increse and decrese of speed. No vibration though. I have an appointment to take it in on Thursday, and i have an extended powertrain warranty that should cover it, i just dont want the noise, what do you guys think about it?

 

TIRES- rotating and balancing will not decrease this noise. some tires ( aggressive or not) make road noise

 

dude i'm really wondering what evil things you did in life to deserve what you have had to deal with, with that truck didn't it have the rear end rebuilt before you got it

 

The rear end was rebuilt a couple years ago way before i bought it (via Oasis report) This noise i hear might not be the rear end, it might be the tires, ive just never personally heard a rear end whine, so i dont know what im listening for. But anyway i take it in tommorow for an alighnment and computer update and they are going to look into it. Thanks!

 

Well for what it is worth I'll tell you what I found out my noise was.

About 4 weeks ago I took my truck into Ford for a new Pinion Seal. Starting about a week or so ago my truck was making all kinds of noise when I would drive but no noise when at idle. It sounded like a hum plus a whistle plus a whine. Anyway I took it back to Ford and they new exactly what it was. The mechanic that replaced my seal over tightened everything causing the seal to go out again plus causing the bearing to get "crushed", their words, plus some other issue. Anway they fixed it all free of charge...now no noise.

Anyway it maybe something to look into because I thought it was either road noise or my rearend as well.

 

Never criss cross. Always rotate front to back, same side.

 

Reduce all tires to 30 psi and drive a course that includes a section where the noise is known to occur. Road noise should be reduced enough to notice if the tires are at fault. If you're now finished, don't forget to reset your tire pressure.
To determine which tire is the worst noisemaker, set all tires at 35 psi. Then, one tire at a time, inflate to 50 psi and drive the vehicle over the same course. Make notes of how road noise changes with the different tires pumped up. Make sure to reset immediately each pumped-up tire before moving on to the next one. This should isolate the worst tire but may be indeterminate if they all are noisy.

 

ok, i might have to wait till i get the truck back, im dropping it off after work at the stealership to have them do an alignment and check the noise. Thanks!

 

I now have my 04 f150 fx scab in for "clutch packs" already had the rear issues fixed numerous times, arrgghhhh.... to say the least and it only has 52k miles on it I really dread the time to change the plugs on this thing, oh yeah did I also mention it sounds like an f-250 diesel!?!?!?!?!?!?!?!!???!
ok, i had to vent but good luck on your repairs

 

That's interesting.... The manual calls for rear tires to the front and the fronts go to the rear end side opposite where they came off.

So....

Left rear to left front

Right rear to right front

Left front to right rear

Right front to left rear

I'm curious where you got your info...

 

Interesting Wild because my manual says exactly the same thing. Maybe our manual is defective??

 

I'm really interested in what the stealership says the problem is. I have a 2004 F150
2WD that started making a noise at about 50k miles. I thought it was the wear bars on the factory tires. But with new tires (same kind) I still have the noise. I can only hear it inside the truck or while riding in the bed. I've stood on the running board and listened .... do not hear. Starts at about 30 mph peaks or changes pitch at about 40. Have listened to the rearend with wheels off the ground / spinning and don't hear the noise. Seems to be in the drive trains as coasting in neutral & engine off at 30 - 35 still has the noise.
Carrier Bearing maybe ?
Front wheel bearings maybe ?
Rear end ?

 

I have a question for you, Who was driving the trunk while you were doing this? Sounds a little dangerous..... LOL

 

Thats what i was thinking!

 

na...... someone else was driving..... not bad dangerous with the window down and holding on to the "fraidy handle".... was a bit chilly though.