Weird noises in F250 - Ford Powerstroke Diesel Forum
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Old 09-23-2010, 01:47 PM
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Unhappy Weird noises in F250

Hey guys, I'm new here, but I've owned a gasser f250 before, though it was on 39.5" iroks, my truck is stock height. I just bought it a little over a week ago, and I keep hearing this annoying noise, and I honestly can't tell if it's coming from the front or the rear, but it speeds up and slows down linear to speed of the vehicle, I thought it might be a u joint, but they all feel fine, then I started thinking abuot the knuckles seals (which the axle shafts shouldn't be turning since they're in the free position) which might possibly let the axle shafts drop down and rub on the ball joints which was a problem I had before with my other truck. I also hear a sort of rattle when I hit bumps but I'm guessing that's the sway bar bushings, as they are worn. Another weird noise I've been hearing is the power steering pump which whines in turns, and when I push on the brakes (the pedal doesn't feel right either) could this be a sign of a worn pump? The fluid is a little dirty (brownish color) so perhaps it just needs a flush, anyways, if you guys have any suggestions, it would be much appreciated, thanks.

-Brandon
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Old 09-24-2010, 04:29 PM
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Bump. For any advice.
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Old 09-24-2010, 05:36 PM
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Mine had a similar sound when I hit a bump.Turns out the ball-joints where shot.Hard to describe the sound,just knew something wasnt right.Jack the truck up until the tire is barely off the ground,take a prybar or something big and lift the tire up a little and see if the ball-joints are good.
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Old 09-24-2010, 05:48 PM
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Its not the ball joints nor tie rod ends. Do you guys think worn knuckle seals cause the axle shafts can be moved up and down by hand. Left wheel hub assembly is new and both lock in and out.hubs are in working order. Another thing I noticed the sound goes away if I lock the hubs in without putting it in 4wd but unlocked the noise comes back. Btw its a 99 cc sb auto manual hubs with electronic 4wd. Thanks guys.
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Old 09-24-2010, 05:52 PM
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I also replaced both wheel bearring assemblies..not 100% sure exactly what my noise was.I just had it all replaced,didnt want to have to tear back into it.
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Old 09-24-2010, 05:55 PM
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Have you jacked up the truck and checked the ball-joints?not trying to doubt you,but we did the same thing twice and missed it.Once we jacked the truck up,we finally found that tire was moving in and out.
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Old 09-25-2010, 06:06 AM
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yeah i checked the ball joints the day i bought the truck, and again a couple days ago, they're good to go, and even look decently new, so no worries there. the left wheel bearing assembly is brand new however the right side is not. i plan to put new knuckle seals and inner axle seals in the truck and take the rotors to have them turned soon, so i'll check the passenger wheel bearing then, but it's really weird how with the hubs unlocked the noise is there, but locked it goes away. it honestly sounds like my other f250 did when the axle shafts would hit the lower ball joint nut (new hub seals fixed it) but i would think it would be backwards (as it was on my other truck) noise with the hubs locked in, goes away when they're unlocked.
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Old 09-26-2010, 12:06 PM
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Also could anyone tell me if maybe the lariats had an auto position on the manual hubs. My truck has super winch hubs with the electronic 4wd. I was thinking that maybe the truck is trying to lock in the hub causing that axle to spin.
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Old 09-26-2010, 04:30 PM
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If the noise goes away when the hubs are locked in it sounds like you may have the " needle bearing " failure coming, pull your axles in the front and pop off the wheel bearings, on the inner part of them where the axle goes theres needle bearings in there that fail and make that noise, but once the hubs are locked in there silent..
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Old 09-26-2010, 05:00 PM
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I will definitely do that. Thank you. I had an assumption of the wheel bearing as one is new and the one on the passenger side where the noise is coming from is not. Have any of you had any experience with a ps pump going out. Mine whines really bad when I turn the wheel and when I push my brakes. My brake pedal also pushes back more than what it feels like it should. The brake fluid all looks pretty clean too so.
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