Weird Vibration/Rubbing Noise When Accelerating - Ford Powerstroke Diesel Forum
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post #1 of 19 Old 05-22-2017, 08:53 PM Thread Starter
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Thumbs up Weird Vibration/Rubbing Noise When Accelerating

I have a 2005 F250 that I did a very small lift on a few years ago. It makes an odd noise and has some vibration when I'm accelerating from a stop, usually only for a few seconds, then it goes away. It almost sounds like something is rubbing on the drivetrain, but I've gone under there and checked numerous times, and I don't see anything close.

I do run a tune most of the time, but that's probably not related.

It has a 2 1/2 inch Icon lift, and I run one size larger tires on the stock rims.

I've done a bunch of searches, but haven't found anything conclusive. I've read things about ball joints, u-joints, bearings, etc. What is interesting is that I read a question asking if it only happens when it's in 2WD, and it does. If I lock the hubs and put it in 4WD (I have a manual transaxle), it doesn't make the noise.

I'm not sure if things are slightly out of whack due to the increased angle of the driveshaft(s), if maybe a bearing is out, or what, and I'm hesitant to bring it in anywhere because they will probably charge me out the arse and not fix the problem. I usually do my own work, but for something like this don't even know where to start.

Has anyone experienced this or have any ideas? I don't want it to turn into something serious.

Thanks for looking.


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post #2 of 19 Old 05-22-2017, 09:01 PM
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Have you checked the downpipe to make sure it's not rubbing on the frame or body. If it too close, it could rub under motor torque and then ease off once the truck is moving well.
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post #3 of 19 Old 05-22-2017, 09:09 PM
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Did you install the lift yourself? Did you check torque and tighten all fasteners to spec on a regular basis after the lift was put in?

Was a new track bar installed, or is the factory bar still in place?

Did the truck make this noise at all prior to the lift going in?

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post #4 of 19 Old 05-22-2017, 10:29 PM Thread Starter
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Quote:
Originally Posted by vitaminjoe View Post
Did you install the lift yourself? Did you check torque and tighten all fasteners to spec on a regular basis after the lift was put in?

Was a new track bar installed, or is the factory bar still in place?

Did the truck make this noise at all prior to the lift going in?
Yes I did, and no I haven't. I will get under there and double-check everything.

I don't remember it doing it before, but am not 100% sure when it started. I don't really get on it much, so honestly don't remember when I started to notice it. I'm pretty sure it didn't do it before the lift, but am also not sure that it started right after.


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2005 F250, Crew Cab, 4x4
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post #5 of 19 Old 05-22-2017, 10:35 PM Thread Starter
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Quote:
Originally Posted by G8orFord View Post
Have you checked the downpipe to make sure it's not rubbing on the frame or body. If it too close, it could rub under motor torque and then ease off once the truck is moving well.
That's one thing I didn't check, I will have to take a better look.

It doesn't seem to do it while in 4WD though, so not sure if that helps identify what it could be.


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2005 F250, Crew Cab, 4x4
Bullet Proofed (ARP head studs, BPD EGR Cooler, OEM oil cooler and head gaskets)
Icon 2 1/2" lift with Bilstein shocks
Tunes - Looney, Looney Wild, Super Panty Dropper
Atlas 40 FICM Tune
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post #6 of 19 Old 05-23-2017, 06:52 AM
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I would add to check your cab mounts as well. All though I don't think this is them, wouldn't hurt and easy to check. I would think this would be more consistent if it was a cab mount however. But I heard when they go bad, it's can cause more vibrations and noise in the cab.


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post #7 of 19 Old 05-23-2017, 07:25 AM Thread Starter
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Originally Posted by trife96 View Post
I would add to check your cab mounts as well. All though I don't think this is them, wouldn't hurt and easy to check. I would think this would be more consistent if it was a cab mount however. But I heard when they go bad, it's can cause more vibrations and noise in the cab.
Good point. I was also thinking this morning on the way to work that I need to check the motor mounts, seems like a perfect explanation, although I'm not yet sure if they are the root cause.


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2005 F250, Crew Cab, 4x4
Bullet Proofed (ARP head studs, BPD EGR Cooler, OEM oil cooler and head gaskets)
Icon 2 1/2" lift with Bilstein shocks
Tunes - Looney, Looney Wild, Super Panty Dropper
Atlas 40 FICM Tune
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post #8 of 19 Old 05-23-2017, 09:39 AM
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Is it worse the harder you accelerate?

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post #9 of 19 Old 05-23-2017, 10:34 AM Thread Starter
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Originally Posted by scparrish View Post
Is it worse the harder you accelerate?
Definitely. If I accelerate pretty hard (which I've not been doing because of the noise), it almost sounds like there's something rubbing against the driveline. It's not a hard, metallic sound, more like a vibration as if the exhaust is pushing up against something.


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2005 F250, Crew Cab, 4x4
Bullet Proofed (ARP head studs, BPD EGR Cooler, OEM oil cooler and head gaskets)
Icon 2 1/2" lift with Bilstein shocks
Tunes - Looney, Looney Wild, Super Panty Dropper
Atlas 40 FICM Tune
FICMrepair.com FICM (Ultra service, lifetime warranty)
DC Power 185 amp Alternator
Dieselsite Coolant Filter
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post #10 of 19 Old 05-23-2017, 10:45 AM
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You are experiencing axle wrap. The U-Joint is binding up on acceleration. Traction bars are a good cure or getting a set of rear leaf springs to get rid of the lift blocks. There are several good options for buying or you can build a set and save a few bucks.

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