virbration that is felt in seat, floor and dash!? Have replaced fan clutch, front wheel bearings, u-joints, swing bearings, 2 tires. still vibrates..whats up!?

Asked by Jan 17, 2016 at 07:37 PM about the 1999 Chevrolet Silverado 1500

Question type: Maintenance & Repair

1997 chevy 1500 extended cab

9 Answers

73,685

Which two tires? When you feel the vibration (shake?) in the seat normally it has to do with the rear end, and in the tires.

1 of 1 people found this helpful.

replaced back tires could torque converter be involved?

254,225

A bad U-joint could.

73,685

Yes, what happens is the flex plate will crack. Take the inspection cover off and look at the flex plate for cracks, and check torque converter bolts.

2 of 2 people found this helpful.

replaced u joints.

thanks Rowefast--will check that out. still interested in other thoughts on it.

19,800

Check transmission mounts making sure they are tight.

1 of 1 people found this helpful.
254,225

Unbalanced Driveshaft

73,685

No harm in checking what you can, but I'll bet it is in the flex plate. Thats about the only thing that could shake the dash. You should be able to feel the vibration sitting in park, motor running, not moving. If this is not the case then it is going to be something else.

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