Question about 2001 Chevrolet Silverado
When driving at highway speeds the vehicle doesnt make any noise but once you let off the gas a noise is coming from under the truck. i jacked the truck up and noticed the front drive shaft was spinning while the vehicle was in 2wd and making some noise from the U joints
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Posted on Jan 02, 2017
Vibrations of this nature are usually associated with the Drive shafts, Universal Joints, Center Support Bearing and Intermediate Spline immediately behind the Center Support. Additionally, the Sleeve Bearing in the Transmission and the Slip Yoke could also be worn. My honest opinion would be the Center Support Bearing and the Spline and Slip Yoke directly to the Rear of the Center Support. The Slip Yoke is equipped with a Grease Fitting and probably has never been Greased. The Rear Drive Shaft Section has the Male Spline and it could very well be badly worn if it hasn't been greased. Drive Shafts also have Balancing Weights which are prone to Rusting Off in our northern states where Salt is used on the roads in the Winter. Examine all drive shaft sections, U-Joints and Slip Yokes for slop and damage. This is best done on a hoist.
If this is NOT the Problem, have Front and Rear Suspension and ALL Tires checked. Many times these vibrations are caused by Wheel Bearings, Tires or worn Suspension Components.
Posted on Jan 13, 2010
Could be a u-joint. Check it by moving the drive shaft side to side, if no play in the u-joints then they are not bad. If you need to replace the drive shaft I would suggest you find one at a salvage yard versus paying that much for a new one.
Posted on Feb 17, 2010
SOURCE: Have a 2002 chevy silverado
It is possible that the ball joint is bad, to check you can jack the wheel up 1/2 off the pavement and use a tire iron to lift up and on the tire and watch the ball joint if it moves up and down thats your problem. from a mechanics point of view I would replace both the top and bottom at the same time as this saves labor since you have to tear it down anyway and the upper ball joint should be worn as well. If the ball joint does not move then put your hands on each side of the tire and move it back and forth, if you get movement you will need to get a second person to move the tire back and forth and watch to see where the play is. normally it will be in the drag link or the control rod, replace items as needed and try for free play again, you may find another bad part as well. normally there is more than on failed part. once you have done the parts replacement you can put a scratch in the tire with a nail on each front tire and then with a tape measure measure the front and back of the front tire you will want to get it toed in 1/8 of an inch then go to a tire shop for a alignment. should be around 58 inch's center so front would be 57 inch's and 15/16 this of an inch and the back would be 58 inch's and 1/16 of an inch. hope this helps. If it does please rate and thanks for using fix-ya.
Posted on Oct 06, 2010
SOURCE: Truck has vibration in seat
Tires are the most common vibration at a specific speed. The only other is the transmission at cruising speed. Check the transmission at a specific rpm, it will be there at all speeds and park and neutral. u joints and bearings are constant.
Posted on Apr 22, 2011
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