Driveline Vibration
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Driveline Vibration
Hi all,
I did a bit of searching and would still like to ask this question:
2002 EX 7.3 4wd, 63k
Slight lift (4"?), BFG 285/75R16 E Load Capacity
At about 60mph, a driveline vibration sets up that can be made noticeably more intense by applying throttle. If I'm climbing uphill and reach 55-60 and pressure the throttle, I get a strong cabfull of vibration/roar/noise. It seems to be sourced at the rear, but feels like it might be rear to center. I tried to test with the gbox in no-OD and although the engine is at different RPM's the driveline vibe seems the same.
Seems like the possible culprits are u-joints, CV-joint, pinion bearing.
Is there a place I should start? A manual test I can do to narrow things down?
Thanks,
Chris
I did a bit of searching and would still like to ask this question:
2002 EX 7.3 4wd, 63k
Slight lift (4"?), BFG 285/75R16 E Load Capacity
At about 60mph, a driveline vibration sets up that can be made noticeably more intense by applying throttle. If I'm climbing uphill and reach 55-60 and pressure the throttle, I get a strong cabfull of vibration/roar/noise. It seems to be sourced at the rear, but feels like it might be rear to center. I tried to test with the gbox in no-OD and although the engine is at different RPM's the driveline vibe seems the same.
Seems like the possible culprits are u-joints, CV-joint, pinion bearing.
Is there a place I should start? A manual test I can do to narrow things down?
Thanks,
Chris
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Joined: Mar 2011
Posts: 11,950
Likes: 5,076
Hi Chris,
I've had several Fords with junk rear ends so that's where I tend to look first.
My '88 F-150 developed a horrible vibration at about 50,000 miles. Ford and several local mechanics swore that it was the tires, despite the problem not going away when I bought a new set of tires, or moving when the tires were rotated. I finally proved the rear-end issue by blocking the front tires, removing one rear tire at a time, chocking the other (standard differential), and running the truck up to 50MPH. The right axle had only a slight vibration. The left axle jumped 6 to 8 inches.
My '97 F-150 also developed a vibration about 50,000 miles. 4x4 w/limited slip so I can't repeat that test, but Ford and I put 5 sets of gears in it and never did resolve it. Ford finally told me to go away instead of replacing the entire axle, as they should have.
My X is now showing a slight vibration. I'm afraid that my vibration will be similar to my other experiences and be a junk rear-end instead of a "normal" u-joint.
I've had several Fords with junk rear ends so that's where I tend to look first.
My '88 F-150 developed a horrible vibration at about 50,000 miles. Ford and several local mechanics swore that it was the tires, despite the problem not going away when I bought a new set of tires, or moving when the tires were rotated. I finally proved the rear-end issue by blocking the front tires, removing one rear tire at a time, chocking the other (standard differential), and running the truck up to 50MPH. The right axle had only a slight vibration. The left axle jumped 6 to 8 inches.
My '97 F-150 also developed a vibration about 50,000 miles. 4x4 w/limited slip so I can't repeat that test, but Ford and I put 5 sets of gears in it and never did resolve it. Ford finally told me to go away instead of replacing the entire axle, as they should have.
My X is now showing a slight vibration. I'm afraid that my vibration will be similar to my other experiences and be a junk rear-end instead of a "normal" u-joint.
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