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Transmission weird sound. Help.


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11 replies to this topic

#1 Haight

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Posted 19 December 2012 - 09:57 PM

So I have been trying to track down what is making this sound for awhile to no avail. It sounds like it is coming from the transmission. Almost like there is a chunk of metal getting tossed around. Sounds kinda like a bell and it increases rate as the rpms rise. It gets louder with more engine load as well. Anyone have any ideas?

#2 l75eya

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Posted 19 December 2012 - 10:29 PM

Does it still make the noise if you're in neutral with your foot off the clutch, not moving? That's assuming its a manual transmission which brings me to my next point, just for information's sake for everybody else that replies, you should give us the year/make/model of the vehicle too.

#3 Haight

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Posted 20 December 2012 - 12:01 AM

Does it still make the noise if you're in neutral with your foot off the clutch, not moving? That's assuming its a manual transmission which brings me to my next point, just for information's sake for everybody else that replies, you should give us the year/make/model of the vehicle too.


ahh good thinking lol. It is a 1987 gl 5 speed D/R. The noise is only on acceleration. I can't even really hear it at cruising speed. Although that might be due to the front wheel bearing going out.

#4 BEECHBM69

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Posted 20 December 2012 - 06:36 AM

ahh good thinking lol. It is a 1987 gl 5 speed D/R. The noise is only on acceleration. I can't even really hear it at cruising speed. Although that might be due to the front wheel bearing going out.


For some reason the "bell" reference sounds like a rear drive shaft (u-joint?) issue, but the "only on acceleration" part doesn't exactly fit with that.

If it's rhythmic and increases with vehicle speed, rather than engine rpm, that narrows it down considerably.

Hope you figure it out.

Dan

#5 Haight

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Posted 29 December 2012 - 05:31 PM

Nope it only increases with RPM. It sounds like something is rattling around down there. No idea. I am hoping that something just needs to be tightened down.

#6 bratman18

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Posted 29 December 2012 - 05:33 PM

Exhaust rubbing on the driveshaft?

#7 MilesFox

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Posted 29 December 2012 - 05:48 PM

I will guess that you have worn trans mounts, and the trans is pitching up enough for the driveshaft to rub on the shifter linkage. With the same regards, it could be the center of the exhaust pipe tagging the driveshaft.

make sure the exhaust is mounted to the bracket at the rear of the trans.

#8 TomRhere

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Posted 29 December 2012 - 06:09 PM

Loose heatshield on the exhaust, y-pipe, cat/con, resonator.....

#9 philoftheblanks

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Posted 30 December 2012 - 04:22 PM

Is it possibly something in the bellhousing area, like a throwout bearing or messed up fin on your pressure plate? Hard to locate these things that only happen while moving, makes you want to ride under the hood while your buddy drives it! (not recommended)

#10 Haight

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Posted 30 December 2012 - 04:58 PM

Is it possibly something in the bellhousing area, like a throwout bearing or messed up fin on your pressure plate? Hard to locate these things that only happen while moving, makes you want to ride under the hood while your buddy drives it! (not recommended)


Yes it does sound like it is coming from the bellhousing area.

#11 GeneralDisorder

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Posted 30 December 2012 - 05:18 PM

It's very likely your T/O bearing on the clutch. They can sound like that. Try loosening the clutch cable and tightening the hill holder cable to pull the T/O away from contact with the PP. If the noise stops then you know where the problem is.

GD

#12 Haight

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Posted 30 December 2012 - 05:26 PM

It's very likely your T/O bearing on the clutch. They can sound like that. Try loosening the clutch cable and tightening the hill holder cable to pull the T/O away from contact with the PP. If the noise stops then you know where the problem is.

GD


I would do that if I knew how...haha




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