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VIBRATION/CLUNK - Help

posted by  someone claiming to be '92 940T on  Thu Oct 3 04:43 CST 2002 [RELATED]

I think I have narrowed the "clunk" down to the left rear. It seems to happen when putting the car in gear, i.e. when in going from park to rev. slight clunk. If I sit with my foot on the brake (car still) and shift it from rev to drive and then back, every time the direction changes I get a brief, but pronounced clunk from the rear. Bushing, right?

Second problem, perhaps related. When carrying a load of passengers , 2-300 lbs. I get vibration when taking off from a stand still. I read a few threads relating to this problem and they all seem to conclude that shims are the answer. However, that seems to be the case when there is no sagging; I on the other hand, have little bit of sagging - left rear - from where the clunk comes from.

I am thinking that this is one that i take to the mechanic, being a relative novice, but I would like as much info as possible before I do that.

Thanks.








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    VIBRATION/CLUNK - Help

    posted by  your mom on  Thu Oct 3 06:09 CST 2002
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    The clunk should be your trailing arm bushing(s). No big deal, really- You can learn to live with it.
    The vibration might be weak u-joints. Extra weight in the car will make symptoms more apparent. IF this is the case, you might want to have a shop fix your bushings and u-joints at the same time. I've heard that u-joints are not fun to try to do yourself.
    You may want to slide yourself under the car and check out the u-joints yourself. Grab the driveshaft on either side of a joint, and turn and twist the thing- see if there's any play in the joint, because there really shouldn't be. Also, push up on the joint and again check for movement. You can also jack up the rear of the car, put the thing in neutral, and have someone turn a rear wheel while you're under there- this will allow you to check for clicking or binding or other "fun" stuff that's happening when the driveshaft is moving. Just be sure that the front of the car is secure- cinder blocks usually work well. The ebrake won't be able to help keep the car from moving since it's only in the back, and you want the back wheels to move freely. It's not fun to have a Volvo fall on you. Well, I don't think it would be, anyways. Good luck!
    --
    1985 245 with 205k and counting.The only Volvo i've had that didn't catch fire on my birthday.








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      VIBRATION/CLUNK - Help

      posted by  someone claiming to be '92 940T on  Thu Oct 3 06:45 CST 2002 [RELATED]

      Could the shot trailing arm bushing be the cause of the sagging? I would imagine that it could be.

      Thanks for the input.

      Sam






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