strange vibration..
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New User
Joined: Nov 2003
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strange vibration..
its a 90' EB, 351 EFI, and a E40D tranny. my problem is every time i hit the 50-60mph range i get a strange vibration..i cant tell whether its coming from the front or right under my seat (sometimes the front, sometimes under me), and it only happens when my foot is at the very top of the gas pedal either giving it gas of letting off. i noticed it last summer, and its just now starting to irritate me enough to find out whats going on, and it hasnt broke yet (amazingly). ive changed the tranny fluid, filter, etc, had my tired balanced and rotated, and had the braked done...so im hoping it might be something simple like an alignment and not some huge tranny thing i halfta go through..so you guys got any thoughts on what it might be??
Senior User
Joined: Mar 2004
Posts: 132
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From: Temecula, CA
You could be getting u-joint binding. That happens when they aren't lubricated regularly, or if the seals fail. They can go bad and still not wiggle. The best way to see if they're binding is to remove the driveshafts and moved the joints by hand. If they are excessively stiff, then that may be your issue. They should move freely in all directions without feeling sloppy.
Is your Bronco lifted? Increased driveline angles can also introduce vibrations.
Is your Bronco lifted? Increased driveline angles can also introduce vibrations.
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