Vibration
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New User
Joined: Jun 2003
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Vibration
2003 SD V10 CC 4X4 Automatic trans, I have had this truck about a month now, 1K miles on it, no modifications. It has a severe vibration that comes in at 71 mph and gets progressivly worse on the way to 75 mph. It is felt through the floor, not through the steering wheel. It goes away as soon as the gas pedel is lifted and returns when it is applied. Pulling a hill at the same speed makes it louder. The noise resonates throughout the cab. Anyone experience this?
FP
FP
Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Vibration
rrmike could be on the right track here are a few
things to chk:
drive line slip joint not greased an binding
drive shaft balance problem ,undercoat or dent in drive shaft
loose motor mounts
loose tranny mounts
loose rear axle u-bolts
u-joints
rear pinon nut loose
worst things could be internal trans parts
torque converter
Rich
on edit also is there a rear noise from rear diff?
could also be rear diff internal carrier not set up correctly from factory.
Is there any shudder on take off?
things to chk:
drive line slip joint not greased an binding
drive shaft balance problem ,undercoat or dent in drive shaft
loose motor mounts
loose tranny mounts
loose rear axle u-bolts
u-joints
rear pinon nut loose
worst things could be internal trans parts
torque converter
Rich
on edit also is there a rear noise from rear diff?
could also be rear diff internal carrier not set up correctly from factory.
Is there any shudder on take off?
Last edited by FortyFords; Aug 2, 2003 at 06:30 PM.
Thread Starter
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Vibration
Thank you for your help.
I have noticed a slight shudder on take off. There is no noise from the rear differential at any speed. While the vibration is present, there is a low pitched humming noise that is resonating
through the cab. Normally, a bad bearing may create a higher pitched noise. Tomorrow, I'm going to run it at 70-75 and see what the tach reads, and then run it at that RPM in third gear and see if there is a vibration present. I took it to Ford this morning on appointment and was told by the service advisor I had to bring it back during the week as they would'nt even drive it to check it during weekends. The a/c stopped working the day after purchase, I took it to an independant shop after being told by Ford it woudl be a week and a half before they could look for it. Added 1.5lbs of gas, checked for leaks, found none, no more problems.
FP
I have noticed a slight shudder on take off. There is no noise from the rear differential at any speed. While the vibration is present, there is a low pitched humming noise that is resonating
through the cab. Normally, a bad bearing may create a higher pitched noise. Tomorrow, I'm going to run it at 70-75 and see what the tach reads, and then run it at that RPM in third gear and see if there is a vibration present. I took it to Ford this morning on appointment and was told by the service advisor I had to bring it back during the week as they would'nt even drive it to check it during weekends. The a/c stopped working the day after purchase, I took it to an independant shop after being told by Ford it woudl be a week and a half before they could look for it. Added 1.5lbs of gas, checked for leaks, found none, no more problems.
FP
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New User
Joined: Jun 2003
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Vibration
I just spent some time under the truck.
The drive shaft is bare metal, no paint, no coating. No dents, no signs of balance weights leaving it. The drive shafts (2) are stickered as being a balanced unit. No movement could be found
while pushing/pulling in the driveshaft at the yolk/pinions. The rubber boot in the slip joint is intact and not broke/punctured. I didn't bring tools home this weekend, so I didn't get to unbolt the carrier bearing and spin it by hand. I did notice some of the -u- joint clips bulged out as if the u-joint cups are pressed tight against them. I have another apointment with Ford on Tuesday
afternoon.
FP
The drive shaft is bare metal, no paint, no coating. No dents, no signs of balance weights leaving it. The drive shafts (2) are stickered as being a balanced unit. No movement could be found
while pushing/pulling in the driveshaft at the yolk/pinions. The rubber boot in the slip joint is intact and not broke/punctured. I didn't bring tools home this weekend, so I didn't get to unbolt the carrier bearing and spin it by hand. I did notice some of the -u- joint clips bulged out as if the u-joint cups are pressed tight against them. I have another apointment with Ford on Tuesday
afternoon.
FP
Posting Guru
Joined: Feb 2003
Posts: 2,153
Likes: 1
From: Roseburg OR.
Vibration
It's actually the rubber bushing around the carrier bearing that goes bad allowing the bearing to wobble around especially during hard acceleration. The shudder during hard takeoff is a shure indicator of a worn carrier bearing. It's not the bearing itself so no noise will be present.
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New User
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Vibration
I just got the truck back from the Ford dealer and it's fixed. They added tapered shims to the rear spring pads to rotate the housing up a little bit to change the drive shaft angle. They covered the rental car while they had it and washed the truck when they were done with it. That's what I call service. Hopefully, this information may help others.
FP
FP
Trending Topics
Posting Guru
Joined: Feb 2003
Posts: 2,153
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From: Roseburg OR.
Vibration
Glad you got it taken care of and thanks for letting us know what the problem was. One more thing to suggest to others with similar problems.
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