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Transmission Noise 200

posted by  Peter S on  Thu Mar 6 22:34 CST 2008
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last visit: Thu Feb 21 18:28 CST 2008
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Hi.

I have a 1984 245 Gas Turbo with the 4 gear manual transmission + 5th gear electronically engaging overdrive.

I've noticed that when driving at higher speeds, generally around 45 or 65mph, there is sometimes a high pitched squeal that comes from the transmission. The sound comes and goes and isn't terribly loud, but the high frequency is unpleasant.

Do I have a bad pilot bearing? If so, is it dangerous to continue driving with the car in this condition?

Thanks!








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    Transmission Noise 200

    posted by  someone claiming to be stripping 90 on  Thu Mar 6 23:23 CST 2008 [RELATED]

    You may also want to lube the center support bearing of the drive shaft to eliminate that possibility,they are famous for high pitched whine.good luck








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      I agree, try lubing the center support bearing first 200

      posted by  jwalker on  Fri Mar 7 03:29 CST 2008
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      last visit: Fri Jun 6 08:39 CST 2014
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      The speed the noise appears coincides with the speed that my 240's center support bearing makes noise. It typically makes more noise in winter/cold weather. It is more of howling sound than a high pitch sound. Someone once described it as "ghosts underneath the car" or something similar.

      There are posts in the archives that describe how to lube it. Try a search. I've lubed mine a couple of times. Lubing seems to last about 12-18 months.


      --
      93 850GLT 100k ( my new daily driver - former little old lady's car :) 90 244DL 278k








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    Transmission Noise 200

    posted by  Stickbuilder on  Thu Mar 6 22:55 CST 2008
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    last visit: Fri Oct 24 03:31 CST 2014
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    Does the noise come and go as you depress the clutch pedal and release it? If so, it's probably the throwout bearing, and will eventually fail. I suppose that you could have a bad pilot bushing, but I don't think that it would make the kind of noise that you described. If the car is pulling (clutch pedal out) the pilot bushing and input shaft are turning at the same speed. It may be that you have a bad bearing in the transmission itself, or a bad tailshaft bushing. If you have no skills at this kind of repair, you might want to have a trusted indie look at it and give you a diagnosis.






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