1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Grinding from tranny?

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Old Nov 20, 2009 | 09:34 PM
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Grinding from tranny?

so when i was driving the rx7 from taking it out to show some friends, right under the shifter/ in the tranny it started randomly squeaky then stopping. So i didnt think much of it. then randomly it started squeaking real hard/loud and stayed. so i got home as soon as i could and parked it. after takin the neon out and playing some cod, i got home and decided to test it again and it still squeaks loud and u can sorta feel it in the shifter. is there something wrong with the tranny? could something have possibly fallen into it or could it be because the flywheel is rusty? im confused here, im not scared of dropping the tranny and doin a rebuild, just confused of what it is. its an 83 engine.
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Old Nov 20, 2009 | 09:42 PM
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Is it a squeaking or grinding noise?

When does it do it?
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Old Nov 21, 2009 | 05:17 AM
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its kinda both, not as much a grinding but not all squeaking, when idling there is none of it, but when revved up, it seems to go up with the revving.
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Old Nov 21, 2009 | 08:46 AM
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Plastic shifter bushing?
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Old Nov 21, 2009 | 10:04 AM
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i dont know much bout trannys, waht do u mean by that? do u mean the rubber thing that goes round the bottom of the shifter before goin into the tranny?
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Old Nov 21, 2009 | 12:14 PM
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does it make the noise when the car is in neutral? or does the car have to be moving?

if the car has to be moving sounds like a driveshaft u joint
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Old Nov 21, 2009 | 01:58 PM
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low rpms dont have the sound, just when the rpms go up, doesnt matter if its in neutral or not. when it revs, the sound goes up with it
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Old Nov 22, 2009 | 12:14 PM
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bump
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Old Nov 22, 2009 | 07:35 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by food7373
low rpms dont have the sound, just when the rpms go up, doesnt matter if its in neutral or not. when it revs, the sound goes up with it
so the car can be stopped? in neutral? doesnt matter if the clutch is in or out?

if yes to any of that, its probably not the trans
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Old Nov 23, 2009 | 06:18 AM
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yeha, but it sounds like its coming from right below the shifter, and i can feel it in the shifter too.
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Old Nov 23, 2009 | 11:33 AM
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From: https://www2.mazda.com/en/100th/
Originally Posted by food7373
yeha, but it sounds like its coming from right below the shifter, and i can feel it in the shifter too.
noise = vibrations, and those transmit.

if you are stopped, there isnt anything in the shifter thats moving, however it could be something attached, like the exhaust, or something on the front of the engine that is spinning.
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Old Nov 23, 2009 | 02:16 PM
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hmm, i didnt think of that, do u think something couldve of fallen into the transmission and got lodged in there? could something have fallen in from around the slave cylinder ?. and what do you mean by the exhaust spinning?
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Old Nov 23, 2009 | 02:50 PM
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He did not state that the exhaust was spinning!

He said that it could be something on the front of the engine......... Meaning the alternator,water pump and or smog pump if it is still on there could be making the noise.

A rotational noise.

The exhaust could be rattling also. There is a factory support bracket that attaches the exhaust to the transmission area. Or the exhaust is hitting something underneath.


You need to put the car up on some car ramps or jack stands and get under there when it is running to see if you can located the noise.

As far as falling into the transmission or around the slave, no!

To eliminate the possibility of it being a rotational noise such as the alt, etc you can just take the belt off and run it for a minute and so and tell whether or not the noise goes away.



Originally Posted by food7373
hmm, i didnt think of that, do u think something couldve of fallen into the transmission and got lodged in there? could something have fallen in from around the slave cylinder ?. and what do you mean by the exhaust spinning?
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Old Nov 23, 2009 | 03:01 PM
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haha, thanks man, once it stops raining around here i will jack it up and locate the noise. i will also check the exhaust. thanks.
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Old Nov 24, 2009 | 12:18 PM
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Originally Posted by food7373
hmm, i didnt think of that, do u think something couldve of fallen into the transmission and got lodged in there? could something have fallen in from around the slave cylinder ?. and what do you mean by the exhaust spinning?
actually if you didn't use the right length bolts in the slave cylinder they can hit the flywheel.

basically if the car is stopped, then the transmission isnt moving, and if its not moving then its not going to make a noise.
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Old Nov 24, 2009 | 01:25 PM
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Originally Posted by j9fd3s
actually if you didn't use the right length bolts in the slave cylinder they can hit the flywheel.

basically if the car is stopped, then the transmission isnt moving, and if its not moving then its not going to make a noise.
hmm, didnt think bout that, i used the ones from the stock one, but i will shave them when i get home or untighten them a small amount to see if it changes anything.
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Old Nov 26, 2009 | 11:13 AM
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today when i was washing it and movin it back to park it, i realized that when u put the clutch in, it goes away. any ideas?
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Old Nov 26, 2009 | 11:37 AM
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http://mazdatrix.com/g2.htm
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Old Nov 26, 2009 | 12:15 PM
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ahhh, thank you very much.
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Old Nov 30, 2009 | 10:12 PM
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May be a bearing in the transmission is going bad. Mine was doing that and when I changed the oil in it, the drain plug was covered with lots of tiny metal shavings. I took it out and dropped it off today to have it rebuilt.
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Old Nov 30, 2009 | 10:30 PM
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trow out bearing could be worn
i would check the drain plug as above
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Old Dec 1, 2009 | 06:00 AM
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i will check drain plug today, its gonna be up on some stands today, so i will do that while its up.
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