U joint? - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 12-21-2011, 09:11 AM   #1 (permalink)
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U joint?

I have a 2004 f250 cc4x4 6.0 liter......i bought it with 90k and kitted it with the diesel soulution kit! runs great, couldnt be happier with the 6.0 liter after kitted. I know have 145k on the truck and knock on wood no major problems since i personally installed the kit. However as most of you do i know my truck really well and so when an unfamiliar sound starts taking place it imediatley creates curiosity! Last night on the way to the store i started hearing a fairly high pitched sqeak sqeak sqeak....the sqeak wasnt due to bumps or turning.....some times the sqeak seemed to speed up with rpm and slow down with rpm but sometimes it did not. Could that be a dry joint or bad joint? Do the joints on F250s commonly fail? I have had 2 superduties now and have never had to replace joints on either. Thanks to everyone for their time and expertiece!
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Old 12-21-2011, 09:48 AM   #2 (permalink)
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when u joints go bad, it is usually a clunk because of the play that is between the two.
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Old 12-21-2011, 09:59 AM   #3 (permalink)
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I do not ususally hear any clunks when putting in gear or turning? hard to tell where its comming from.
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Old 12-21-2011, 10:40 AM   #4 (permalink)
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Maybe a bad belt or pulley? The only u-joints I've had to replace has been the drive shaft one. 3rd one in 125k miles.

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Old 12-21-2011, 12:43 PM   #5 (permalink)
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when in park throttled up it doesnt make the noise...only when the drive train is in motion! Steers me away from it being a belt or pully? hard to tell on the joints....not ruling out a main joint in the line but not slack in the shaft...hmmmm was your truck lifted? was it the same one you have had to replace 3 times?
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Old 12-21-2011, 01:29 PM   #6 (permalink)
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I would say it's a u-joint. It's probably at the point where it's getting dry but not worn enough to actually have play in the joint. If they are aftermarket u-joints, they may be greaseable and you could try greasing them to see if if the squeak goes away.
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Old 12-21-2011, 03:55 PM   #7 (permalink)
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Originally Posted by grayson20 View Post
when in park throttled up it doesnt make the noise...only when the drive train is in motion! Steers me away from it being a belt or pully? hard to tell on the joints....not ruling out a main joint in the line but not slack in the shaft...hmmmm was your truck lifted? was it the same one you have had to replace 3 times?
No lift or anything. Its a regular cab so it has a 1 piece drive shaft. Same joint every time. It probably has a lot more stress put on it with the 6 speed, but who knows.

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Old 12-21-2011, 11:17 PM   #8 (permalink)
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Take off the back wheels and remove discs, see if your backing plate has rusted out and there are bits of metal rolling around. I would check this before you look at u joints.
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Old 12-22-2011, 10:33 AM   #9 (permalink)
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I agree with MaxPayne, check your brakes on all four wheels. You could have pads worn down to the feelers which will give you a high pitched squeal.
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Old 12-22-2011, 02:49 PM   #10 (permalink)
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I am gonna take my truck down and put it on my lift tonight and rotate tires, my breaks are all relatively new but will definatly check...What is it you are calling the backing plate? When i am hearing the sqealing i can mash on the breaks and it doesn change other than slow down! In the mornings when its cold i will warm much truck up and head to work i dont hear it near as much as when my truck is warmer and i am heading home or if i drive a round for a bit? My joints are all factory and non greasable other than the u joints on the front wheels! I am not feeling any vibration yet either! Sure appreciate every ones time and thoughts!
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Old 12-22-2011, 08:45 PM   #11 (permalink)
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If you have a multiple piece driveshaft check the driveline bearing. I drilled a very small hole in the bearing shield and used a needle to inject grease.
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Old 12-23-2011, 06:54 AM   #12 (permalink)
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That sure sounds like a dry joint on it way out.The fleet I manage is mainly ford product with 5 S/D's and when the joints go thats what the begining of the end sounds like.
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Old 12-23-2011, 10:14 AM   #13 (permalink)
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greased jointson front axle....still squaling. Blocked wheels and put truck in neutral...no play in joints?......carrier bearing seems ok but not certian....do i go ahead and start at the yoke and replace joints? thanks agian guys!
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Old 12-23-2011, 08:01 PM   #14 (permalink)
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I've had (have) the squeak-squeak-squeak too.

Never did diagnose the noise, and it's gone for the most part now. Mine started after I had my pinion bearings changed. On mine, the sound was definitely not the brakes ... I'd here in on decel & accel no matter if I had been on the brake pedal.

I supported the rear axle on jack stands and ran the truck in drive once & it sounded like it was coming from the pinion area. I suspected rear u-joint also, but I had just installed new Spicer lifetime joints less than 8k miles before the sound started.
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Old 12-23-2011, 10:32 PM   #15 (permalink)
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Okay Grayson try this, it won't take to long.
Pull both rear wheels off and remove calipers, then pull discs off and look at your parking brake assembly ( backing plates). Look carefully at the assembly and make sure the pins have not rusted through. It might take you 45 mins.
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