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Vibrations 700 1988

posted by  someone claiming to be Mike Campbell on  Tue Nov 3 08:15 CST 1998 [RELATED]

My 740 has developed a nasty vibration. First of all it acts as if it needs a tune up and I just replaced the plugs and wires. But the vibration that I was experiencing before the plug and wire change did not go away. The car vibrates the most when it shifts from 2nd to 3rd. I can't tell if its the engine or the drive train.

Any suggestions?

I have a apppointment to take to the local dealer the first of next week.







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Re: Vibrations 700 1988

posted by  someone claiming to be Rob Abel on  Wed Nov 4 02:24 CST 1998 [RELATED]

Mike, I have an '87 740 - same problems. Here's what cured them:

motor mounts

transmission mounts (change at the same time as motor mounts)

exhaust manifold gasket

tighten exhaust heat shields (listen with stethoscope with engine idling)

transmission to exhaust support bracket similar to 940 (available from volvo dealer for less than $100)

done. quiet. finally. Sounded like an old tractor before. now a car again.






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