2005 F250 195k miles. The truck has developed a howling noise comeing from what sounds like the driveline. It is most apperant at slow speeds with the windows up. It almost sounds like tire growling on the pavment but I can also hear it driving through the grass.

The last vehichle that i heard this from was my dd and ended up being a pinion bearing.

I put it on jack stands, removed the tires axles and driveshaft, spun the pinion yoke by hand it feels smooth. I also checked the rear hub bearings and they feel fine also. With the axles out and it up on jack stands i ran the truck and could still hear the noise. It almost sounds like it is comeing out of the T case output. The T case is a NP 271(manual shift).

Any ideas??

Thanks guys.

 

When I hear the word HOWLING, the only thing I think of is the rear end! Check the fluid level in there. Got 4W drive? MAYBE front differential.

 

Thanks Bud that's exactly what it sounds like a howling rear.

The fluid level is good and it spins real free, no binding feeling in the bearings.

The mystery continues.

 

Are your hubs locked ,I had a vibration and it was the bearing in the front driveshaft knuckle (c-v ball) I think its called.

 

The center support bearing???



Sean <BR>

6.0L Tech Folder

 

i had this very sound myself, people kept telling me it was the tires. Well low and behold i got the front end jacked up and spun the front passenger wheel and there it was. Truck has 117k miles on it.

what i noticed was it would kinda stop when i turned left on city streets at low speed. if i turned right it would come back slightly. for your sake i hope its not the rear end.

 

So it was the hub/bearing?? Or the tire??

Oddly thats the only one i didn't check, pass side front.

Ill be checking that this week.

Thanks everyone for your input.

 

Thanks. Sean, that bearing has been changed out twice now in the last 4 yrs. Doesn't meen its not the culprit thouh.

 

You got it good and lined up with the shaft? I found that the one that I
had fail was not at 90º to the shaft centerline.

However the hub bearing could be a better place to start.



Sean <BR>

6.0L Tech Folder

 

the dealer replaced the bearings and front ujoint/axle shaft as well.

 

OK thanks. Thats the next thing one the list.

.

 

I took the front pass side wheel off and could not realy feel anything spinning the brake rotor so I put the wheel back on and gave it a good hard spin and there it was. It feels like it is the hub/bearing. Next question is what brand should I go with.

 

Made 2 short videos.

 

Ford product lasted 195,000 miles +. Any reason to go with anything else?

 

I can't argue with that.

Gotta research and see how much its going to set me back.