Question about 1997 Chevrolet S-10 Pickup

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Is the center support bearing pressed on to the drive shaft.. I have a 1994 s-10 4.3 auto I get a vibration in drive and overdrive.. I'm thinking U-joint and or support bearing... no big clunks going from reverse to drive. What do you think?

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  • hillcrestobs Nov 14, 2009

    Thanks.. I always mark all yolks and connection points
    to assure it is re assembled as removed and indexed thanks for the info. U-joints are easy. I'll have to take the front shaft to the machine shop..

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  • Master
  • 2,309 Answers

Yes the bearing is pressed on, vibration in the drive line can be caused by bearing or u joint, its best to replace them all at the same time and make sure thi driveline is dialed in

Posted on Nov 14, 2009

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AFTER REPLACING U-JOINTS & HANGER BEARING ON MY 1995 VOLVO 960 I HAVE VIBRATION AT SPEED PARTICULARLY UNDER ACCELERATION. I TRIED ANOTHER SHAFT AND IS WORSE. I THINK IT MIGHT BE HANGER BEARING ALI


did you mark the two ends of the shaft at gearbox and diff
so they lined up again
with the center bearing replacement
did you mark the two halves before separating and replacing the center bearing
then make sure they lined up again

if vibration is there
you may need to go to a diff shop and have the drive shaft balanced properly

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Vibration throughout car...change engine mounts, changed centre bearing, gearbox mount, changed both front and rear couplers still have bad vibrations


check for the drive joint phasing and angle setting of the center bearing
mostly with center bearing , the drive shaft has to be split and the flange removed for the bearing replacement
the flange can be put back on in any position and that will throw out the s joint phasing
Take it to a drive line specialist shop and ash them to check the phasing and angles to eliminate the vibration
The vibration could have been from a bad joint and the new joint was not properly installed which will also vibrate
If you are not familiar with the term phasing It is when the joints are in direct line with each other when placed on a flat surface and allows the differentiating speeds of the crosses as they pass through the 90 degrees to cancel each other out and stop the vibration
the drive line specialist will know and explain it better as he will have the drive shaft to show you on

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Two piece drive shaft vibrating


just take the drive shaft out and replace all u-joints (3) and ur center support bearing (1) in all on my 2002 gmc sierra 2wd it was 50 dollars

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Drive Shaft center support bearing is vibrating/shimmying How do you know when it is bad?


The short answer is when it vibrates and shimmies its bad. The bearing tolerances of a new center support should not allow this to occur, however this could be caused by an external force such as a poorly balanced (or damaged) drive shaft.

Jan 17, 2011 | 2003 Chevrolet Silverado 2500HD

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How to replace the center support bearing and what size bolts or if studs are used what size nuts are required? Also what is the best tool to use for changing the spark plug behind the steering shaft?


The center support bearing is secured to the cross-member using either a stud with an 11/16 in. nut or sometimes an 18mm nut. or it can also be sucured using a 3/8 in. bolt with a 5/8 in. bolt head and either a 15mm, 5/8", 11/16", or an 18mm nut, and GM did not stop the assembly line when they ran out of a certain nut or bolt and that is why there could be so many different ones used.

(A split drive-shaft is a balanced unit and it must be marked for proper alignment before separating the two halves or the drive shaft will no longer be in balance and will cause a vibration and early u-joint failure, and be very sure that there is a line on each half of the drive-shaft before it is separated so that the drive-shaft can be aligned re-assembled correctly)

The center support bearing should be pressed off and on the drive shaft using a hydraulic press, (a machine shop usually does not charge very much to do that) and using a hammer and a drift to replace the center support bearing is not recommended however some people do replace the center support bearing that way and a lot of the time they will damage the drive shaft or center support bearing and that will only make it more difficult and time consuming to properly install the center support bearing.

(The u-joint and the axle yoke should also be marked together before the u-joint is removed from the axle yoke so that they are installed back in the same way that they came out to prevent any drive shaft vibration)

To change the spark plug behind the steering shaft use a spark plug socket (a good spark plug socket will also have a provision for attaching a 5/8" or 16mm wrench to the end of the spark plug socket) and instead of putting an extension and a ratchet on the socket, slip the socket onto the spark plug and then use the wrench to loosen the spark plug and to tighten it, but also use a length of 3/8" fuel line and push the end of the spark plug into the fuel line and then use it to start and run down the spark plugs and also to remove the spark plugs once they have been loosened.


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1 Answer

Vibration at above 85 km/h


DO U HAVE A 2 PIECE DRIVE SHAFT? IF SO REPLACE THE CENTER SUPPORT

May 28, 2010 | 2003 GMC Sierra 2500HD

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I have a 03 silverado 2wd regular cab 4.3 with automatic transmission that has developed a vibration when almost to a stop and at take off from a stop, the truck doesn't vibrate at highway speeds but when...


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.

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I have a 2000 Expedition 4.6L Triton. I've had truck about 7 years and love it. I have had all the transmission issues this truck can have...(I thought) until now this: SYMPTOM Transmission drives well in...


4R100 or 4R70W?

Geartrain
Power is transmitted from the torque converter to the geartrain components through the input shaft and forward clutch cylinder.
  • By holding or driving certain members of the gearset, four forward ratios and one reverse ratio are obtained and transmitted to the output shaft. The ratios are as follows:


GEAR RATIO 1ST 2.71 to 1 2ND 1.54 to 1 3RD 1.00 to 1 4TH 0.71 to 1 REVERSE 2.18 to 1
Input Shaft
The input shaft is supported by two bushings in the stator support. End positioning of the input shaft is controlled by the splines in the converter turbine and the overdrive planet assembly.
Output Shaft
The output shaft is supported by two bushings in the case and by the slip-yoke and bushing in the extension housing. End positioning is controlled by the parking pawl gear and snap ring or shoulder and by the reverse ring gear hub and snap ring.
Overdrive System
The overdrive planetary system consists of the overdrive planet assembly, overdrive sun gear, overdrive ring gear, coast clutch cylinder, overdrive one-way clutch assembly and the center shaft, as shown in the following illustration. The overdrive planet assembly is splined to the input shaft. The overdrive sun gear is centered by a bushing on the input shaft and held in place laterally by needle bearings on the reactor support and the overdrive planet assembly. The overdrive sun gear is splined to the coast clutch cylinder, which in turn is splined to the overdrive one-way clutch inner race.
The outer race of the one-way clutch is splined to the overdrive ring gear, which is splined to the center shaft. The center shaft is centered by the forward planetary assembly and is laterally held by needle bearings on the center support and the overdrive planet assembly. The center shaft is splined into the forward clutch cylinder.
Two friction clutches are assembled in the overdrive planet assembly. The coast clutch is splined between the coast clutch cylinder and the overdrive ring gear. The coast clutch is activated to perform engine braking in MANUAL 1, MANUAL 2 and third gear with the transmission control switch engaged.
The overdrive clutch is splined between the case and the coast clutch cylinder. The overdrive clutch holds the coast clutch cylinder and, in turn, the overdrive sun gear, to permit the planet assembly to overdrive the ring gear.
--------------------------------------------------------------------------------------------
Forward Drive System
The forward drive system consists of the forward clutch cylinder, intermediate brake drum, intermediate one-way clutch, input shell, forward ring gear, forward ring gear hub, forward/reverse sun gear and the forward planetary carrier and forward planetary gears.
The forward clutch cylinder is splined on the center shaft. The forward ring gear is piloted on the forward ring gear hub. Thrust bearings on the forward planet assembly and forward clutch cylinder hold the forward ring gear hub in place.
The intermediate brake drum is radially supported by bushings on the center support and is laterally controlled by thrust washers on the forward clutch cylinder and center support. The intermediate brake drum has the inner race of the intermediate one-way clutch press-fitted on its pilot. The intermediate one-way clutch's outer race is splined to the intermediate friction clutch, which is splined to the case. The intermediate brake drum has lugs that are slotted into the input shell to form a mechanical connection. The input shell is splined into the forward/reverse sun gear. The forward/reverse sun gear is common to two planetary gearsets. The forward planet is splined to the output shaft and is laterally positioned by needle bearings on the sun gear and on the forward clutch cylinder, as shown in the following illustration.
Two friction clutch assemblies, the direct clutch and the forward clutch, are shown with the forward planetary assembly. The direct clutch assembly splines the forward clutch cylinder to the intermediate brake drum. The forward clutch assembly splines the forward clutch cylinder to the forward ring gear. The forward clutch is activated during all forward gears. While in third or fourth gear, both the direct and forward clutches are applied to hold the forward planetary assembly and enable it to act as a solid shaft.
In second gear, the intermediate clutch assembly holds the forward/reverse sun gears. It is applied, along with the intermediate one-way clutch, to hold the intermediate brake drum, input shell and forward/reverse sun gear. In higher gears, the one-way clutch overruns.
----------------------------------
Low and Reverse Drive System
The reverse planetary assembly consists of the reverse planetary carrier, reverse planet gears, the reverse ring gear, the reverse ring gear hub, the reverse clutch hub and the low-reverse one-way clutch assembly.
The reverse ring gear hub is splined to the output shaft and to the reverse ring gear. The reverse ring gear hub is laterally held by a needle bearing on the inner race of the low-reverse one-way clutch and a snap ring on the output shaft. The reverse planet assembly is splined to the low-reverse clutch hub. The low-reverse clutch hub is connected by the reverse clutch to the case. The inner race of the one-way clutch is bolted to the case.
The reverse clutch assembly is activated in REVERSE gear and in MANUAL 1. The reverse clutch bypasses the reverse one-way clutch during coast and MANUAL 1. The reverse clutch holds the reverse planet assembly in REVERSE gear to enable the sun gear to drive the reverse ring gear in the opposite direction.
-------------
Apply Components
The following information describes the operation of the three 4R100 one-way clutches.
One-Way Clutch—Overdrive
The overdrive one-way clutch, shown in the following illustration, transmits engine torque from the overdrive sun gear to the overdrive ring gear in first, second and third gear range. The overdrive one-way clutch transmits power when the sprags are engaged between the inner and outer races. The inner race is splined to the coast clutch cylinder, which in turn is splined to the overdrive sun gear. The outer race is splined to the overdrive ring gear.
The overdrive one-way clutch engages whenever the overdrive planetary system attempts to drive the overdrive sun gear clockwise when the overdrive ring gear has a counterclockwise torque from the vehicle. When torqued counterclockwise, the overdrive one-way clutch engages and acts as a wedge to lock the sun gear and the ring gear together. During coast, the overdrive one-way clutch enables the ring gear to overrun or spin at a faster rate than the sun gear.
The overdrive one-way clutch overruns when in overdrive (fourth gear). In overdrive, the coast clutch cylinder is held by the overdrive one-way clutch, which in turn holds the overdrive sun gear. This causes the overdrive planet assembly to walk around the sun gear and overdrive the overdrive ring gear. The inner race of the overdrive one-way clutch is thus held stationary while the outer race is allowed to overrun clockwise.
--------------------------------------------

Nov 10, 2009 | 2000 Ford Expedition

1 Answer

High speed Vibration comes and goes.


you need to take the shaft to a machine shop to have it pressed

Oct 01, 2009 | 1999 GMC Sierra

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