severe vibration
Lead Driver
Joined: Sep 2003
Posts: 7,017
Likes: 209
From: SoCal
Let me assume you're talking about an Aerostar.
You can check the crossmember for worn bushings. The most severely worn bushings will have the inner sleeve hitting the outer sleeve, making metal-on-metal noises when you accelerate or decelerate. They should not cause a vibration.
I would look for some really bad U-joints, or possibly transmission problems.
Vibrations from a dead cylinder usually come from accelerating; you get uneven power generation. You don't usually feel that from letting off the gas when all cylinders go to minimal power generation.
You can check the crossmember for worn bushings. The most severely worn bushings will have the inner sleeve hitting the outer sleeve, making metal-on-metal noises when you accelerate or decelerate. They should not cause a vibration.
I would look for some really bad U-joints, or possibly transmission problems.
Vibrations from a dead cylinder usually come from accelerating; you get uneven power generation. You don't usually feel that from letting off the gas when all cylinders go to minimal power generation.
Junior User
Joined: Jan 2008
Posts: 59
Likes: 0
From: USA - New Mexico
Is it a 4WD model? I had the same thing with no noise or vibrations normally but a bad vibration when I lifted off at highway speeds when the front driveshaft bearing went in my transfer case. It can be checked by seeing if there is any play in the front driveshaft.
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