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Center Bearing Shims 240 200

posted by  DHartlein on  Fri Mar 26 07:14 CST 2004
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last visit: Sat Aug 2 20:00 CST 2014
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Everything has been replaced - bushings, ujoints, center bearing, all mounts, and the driveshaft balanced......I am getting a vibration on decelleration with and without braking and found the following in a prior post:

"Driveline Take-Off Vibration: Shimming May Be Required. From Volvo Technical Service bulletin 45/102 Jan '91. [Symptom:] Take-off vibrations at low speed, especially with high acceleration and/or heavy load, can occur in some cases. [Solution:] The level of vibration can be reduced by changing the vertical position of the center support bearing. Best results differ from car to car. Start with a change of 6mm (1/4") upwards. If results are not acceptable, try positions from 5mm (3/16") downwards to 12mm (1/2") upwards from the original position. Note that clearance between drive shaft and fuel lines must be at least 20mm, and between drive shaft and the fuel tank at least 16mm. Shimming upwards should not exceed 12mm (1/2") and after re-positioning the center support bearing housing should not contact the floor pan."

Lowering the bearing by shimming the brackets seems easy. Does anyone know where to place the shims to move the bearing up?

Thanks!

David







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    Center Bearing Shims 240 200

    uid 18083's pic
    posted by  lucid on  Fri Mar 26 10:58 CST 2004
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    last visit: Fri Oct 24 12:31 CST 2014
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    I believe that's a 700/900 bulletin, which doesn't apply to 200 series.
    --
    Bruce Young
    '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.








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      Center Bearing Shims 240 200

      posted by  Cliff Pope on  Fri Mar 26 18:45 CST 2004
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      last visit: Thu Feb 3 05:28 CST 2011
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      All the same, it's a point worth thinking about if intractable vibration cannot be cured by looking for any of the other known causes.
      I imagine the idea is to try and get as straight a line through the drive line as possible, with the car loaded in its most usual position.
      As you say, lowing it is obvious. As there aren't any shims to start with to take out I can see no obvious way of raising the bearing. The rubber housing seats on the underside of the floor pan, so that looks like the limit other than modifying the whole assembly and finding/constructing a smaller rubber support.
      I have sometimes wondered whether the rubber isn't too spongy even when new, and whether that either encourages or initiates vibration. Has anyone ever tried a harder rubber, or any other kind of modification?
      After all, harder rubber suspension mountings are a common after-market modification to improve the handling of a lot of cars.








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        Center Bearing Shims 240 200

        posted by  Aye Roll on  Fri Mar 26 23:15 CST 2004
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        last visit: Tue Oct 14 21:08 CST 2014
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        There's no way to move a 240 center bearing upward- it's mounted inside the tunnel. The bottom of the rubber is retained by a metal strap, like a mini-crossmember that holds it up into the tunnel. There's no way to shim anything either way because if nothing else, you'll never get the bolts into their angled, captive nuts.
        --
        Rob Bareiss, New London CT ::: '87 244DL/M47- 228K, 88 744GLE- 212K, 91 244 183K-SOLD! Also responsible for the care and feeding of: 88 745GLE, 231K, 88 244GL, 146K, 87 244DL, 239K, 88 245DL, 246K







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