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-   -   Is it my trans, TO bearing or hydraulics? (https://www.miataturbo.net/general-miata-chat-9/my-trans-bearing-hydraulics-63281/)

levnubhin 02-03-2012 06:34 AM

Is it my trans, TO bearing or hydraulics?
 
With clutch pedal down I hear this loud sound of death (screatching squealing spound). Let off the pedal it goes away. Also from time to time with clutch pedal down and trans in gear the clutch stays engaged. I have to force it out of gear when that happens. I also have difficulty changing gears from time to time, unless I dbl clutch then it shifts smoothly.



What say you?
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blaen99 02-03-2012 06:41 AM

TO bearing, or a synchro going if this happens in a specific gear. Check out hydraulics first to make sure it's not anything obvious however.

curly 02-03-2012 07:54 AM

Unless the sound of death happens with the engine off, it's clutch related. Doesn't hurt to check the hydraulics though. I'd say TO bearing, but expect a clutch job. Broken TO bearings often fly around and destroy the rear main seal too. If it works at all still, I'd say it hasn't flown apart yet, but I'd replace the deal anyways.

rleete 02-03-2012 09:13 AM

T.O Bearing. Classic symptoms.

Moffitt 02-03-2012 10:22 AM


Originally Posted by curly (Post 830225)
Unless the sound of death happens with the engine off, it's clutch related. Doesn't hurt to check the hydraulics though. I'd say TO bearing, but expect a clutch job. Broken TO bearings often fly around and destroy the rear main seal too. If it works at all still, I'd say it hasn't flown apart yet, but I'd replace the deal anyways.

What he said^ expect a clutch job, typically any situation I've come across a bad TO bearing is when you press the clutch pedal down (No Noise), and when you let off the clutch pedal (noise follows).

If the trans will shift fine while the car is off, and then has trouble when it's running, chances are a bad clutch

Doppelgänger 02-03-2012 10:23 AM

TOB will have a supercharger-like whine to it while driving.

I wonder about your pressure plate being bad.

ILoveOffRamps 02-06-2012 01:19 AM

dead TOB and pressure plate that probably has a few dying (bent) fingers.

miata2fast 02-06-2012 08:27 AM

That sound you hear could be the throwout bearing cutting the teeth in your pressure plate.

If something is badly worn, the throwout bearing will not be able to push the pressure plate far enough to release the clutch.

Good to see you posting again. I have not heard from you much.

levnubhin 02-07-2012 12:12 AM

Theres no noise at all while driving, it only comes when I push the pedal in and it isn't all the time. The trans shifts smoothly with the car off and if I dbl clutch. If I don't dbl clutch it wont shift smoothly probably about 75% of the time. Is the noise definitely a bad TOB or could bad hydraulics cause it? Why would dbl clutching allow me to shift smoothly?
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levnubhin 02-07-2012 12:14 AM


Originally Posted by miata2fast (Post 831297)
Good to see you posting again. I have not heard from you much.


Thank man, life has been really busy with lots of changes. Don't spend much time at all on the interweb.
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Mobius 02-08-2012 03:19 AM


Originally Posted by levnubhin (Post 831788)
Theres no noise at all while driving, it only comes when I push the pedal in and it isn't all the time. The trans shifts smoothly with the car off and if I dbl clutch. If I don't dbl clutch it wont shift smoothly probably about 75% of the time. Is the noise definitely a bad TOB or could bad hydraulics cause it? Why would dbl clutching allow me to shift smoothly?

I'm going with hydraulics and TO bearing. You can shift smoothly with the engine of because - the engine is off. Disengaging the clutch is not necessary to shift. Double clutching while the engine is running pumps enough pressure for you to be able to get the clutch to disengage. Having to use force to get the shifter out of a gear is a classic hydraulic problem symptom. The nasty noises ... TO bearing.

levnubhin 02-08-2012 03:26 PM

Alright, guess that solves it.
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