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What the heck can it be? I replaced the center carrier bearing and the rubber housing. I only hear it when it is cold. It disappears after being driven for 5miles or so. Not coming from the engine (I am sure of it)...it's something in the drivetrain....have i missed something?
TIA!
SM
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90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL
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posted by
someone claiming to be twoforty
on
Sat Jan 10 02:54 CST 2004 [ RELATED]
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If this just started, in this cold snap, let your brick warm up several minutes. Strange noises develop in extreme cold........the brick crying for warmth !!
In this type of weather, it's not a bad idea to let the brick idle for 10-15 minutes. Take it easy for several (5-10 ) miles, so all working parts can take the temperture change. One of the major causes for mechanical falures, is lack of proper operating temperture (causes all sorts of lubricating problems), and other cold weather related problems.
Keep warm !!
twoforty
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Thanks twforty....I usually let it warm up for 5-10mins as I hate sitting in a cold car myself. I always take it slow the first 5miles...meaning I do not rev the engine, brake hard, pull off slow, etc. Usually that nosie does go away after this. I think it has to do with the tailshaft bushing....I always had this on the back of my mind, but I wanted to get it confirmed here. I guess I will tackle it before the next winter. I know it's not that bad since I don't have any ATF leaks and I didn't notice any lateral play in it when I replaced the center support bearing 3 weeks ago.
Thanks,
SM
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90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL
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Check the bushing on the output shaft at the rear of the tranny for any play. If bad it can make a heck of a noise.
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David Hunter
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oh crap! it almost sounds like that's what my problem is. How bad is this? I mean, it can only get worse, but can i let it go for a while? I checked for play when I replaced the center bearing 3 weeks ago....nothing at all...and no leaks, but I guess it doesn't mean that the bushing's bad. Anyhow....it doesn't seem like a difficult task, just messy!!
Thanks
SM
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90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL
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It has been my experience that you will be able to easily feel the play when the bushing goes bad. You can drive for a long time with a worn bushing, the noise will get worse and eventually the seal will start to leak. I doubt you should be in a rush to change it besides it may be something else.
Is the noise in unison with road speed as opposed to engine speed? Occurs under load, coasting, in neutral, all gears?
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David Hunter
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Does turning the car effect the noise at all? If so that would strongly suggest wheel bearings. The front are most likely to go, but it's not unheard for your rear bearings to fail. Most people forget to do maintenance on the rear bearings. It's often difficult to tell whether a drivetrain noise is coming from the front or the rear. You have to jack each wheel up and spin them around to listen for bad bearing noises, or feel for play. On a rare occasion, they will still be bad even if there is no play or no obvious noises when there is no load on the wheels. If you have an hour or two, you might clean and repack all of your bearings. If you see any scoring or pitting on the bearings or races, you'll need to replace them. At any rate, you might consider going to the auto parts store to buy the inner seals, because if you're going to be taking the bearings out, you'll need to replace those at the very least.
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The front bearings were replaced back in spring. Which inner seals are you referring to?
Thanks for the reply.
SM
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90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL
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I'm talking about the bearing grease seals. They would have been replaced when you had your front bearings done. It is possible that your rear bearings are causing the problem, but it's hard to say for sure. If you find that turning the car effects the sound, that's the common symptom for bearings. It's also slightly possible that the sound might be bad U-joints. But they usually don't fail without some serious clunks and vibrations in the driveshaft. Bad gears in the differential, perhaps? It's hard to say without hearing it.
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you might check your front wheel bearing(s) dependant upon which side the noise emanates from. '79 244 odo stopped @37,000.
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western duds, boots, paperbacks,artifacts,poetry
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my 1990 has occasionally howled when cold. I always thought it was in the transmission. It doesn't always do it and it has been a number of years since first noted.
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posted by
someone claiming to be david s.
on
Fri Jan 9 13:49 CST 2004 [ RELATED]
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hi, ive been facing the same problem and made me nervous. i got it checked by a mechanic who said it was the tranny and sent me to a tranny specialist. the tranny specialist test drove my car, checked the drivetrain thorougly, and as soon as the car warmed up a bit, drove it again. noise was gone. he said it was the tranny oil losing viscosity when its cold. i try not to be nervous about it anymore.
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hm...I noticed this howling last year right before spring, I think the noise started after I replaced the trans mount. I got this 'heavy duty' one from FCPgroon, but it was round and not square like it was. I think it is square for all autos?? It fit quite nicely, but the noise started a few weeks after that. I thought it was the center bearing on its way out...however, it was on it way out....it was so dried out, I could feel the friction when spinning it. I foxed that, but the noise is still there. Could it be the rear wheel bearings?
Thanks
SM
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90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL
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