Bad throw out bearing?

[hungryjoseph]

I want to make sure I have a bad throw out bearing before I order a new clutch kit. My first transmission (sr20) started making a grinding noise when I was decelerating in gear, and a whooshing/whining noise when I was accelerating, also a skateboard coasting on the sidewalk type of noise when it was at idle. None of these noises happen when the clutch is pressed in. It does not grind or whoosh when it's out of gear, whether that is in neutral or clutch in. It does make the coasting skateboard side at the stoplight though, when the clutch is not pressed in. I thought it was the main shaft on the transmission so I just picked up a KA trans for 50$ and it does the same thing. Is it my throw out bearing?

edit: also want to add that this is an exedy stage 2 clutch kit that was installed aprox 10 - 13k miles ago on an sr, and yes the throw out bearing, pilot bearing were replaced. I've launched numerously and had quite a few clutch kicks at some events. everything was fine when the motor/trans was in the old car, but it started doing this RIGHT when it got into the new car. I posted this on the SR forum a while back but I didn't really get too many helpful replies

http://youtube.com/watch?v=Tbfewpi_oTo

Yes, the boost leak is fixed, so don't pay attention to that, just turn your speaks up and listen closely for the noises I described. I've done some searched and saw some replies to similar problem, and people have asked about the trans mounts, motor mounts, and they're NOT the problem. Brand new nismo mounts, all tightened down

[Didderson]

My ka used to do that. It's just worn synchro's from what i've been told. It's not a problem at all really, nothing to worry about, it usually makes those buzzy sounds on the decel right? If it was a bad throw out bearing it would sound really ugly if your clutch pedal isn't depressed and your trans is in neutral you would hear some wierd noise like stones grinding each other inside well, a bell housing.

[Didderson]

I've been told the reason my trans did that (it was only 3rd and 4th gears) but fourth mainly was because fat americans who drove my car before me rode in 4th on the highway too long or just left it in 4th too much at low bogging speeds.

right at 2:10 is exactly how mine used to sound. It would usually only do that on the decel like you're doing right there. It's fine, just a little used.

[hungryjoseph]

well i do hear a nasty noise when the clutch is not depressed, and i do hear a noise like stones grinding when it's in neutral, but now that i think of it, if it was the tob then it would make a noise when the clutch is depressed since thats the only time it touches anything right?

[srpowered240sx]

some might correct me, but im looking at an old trans on the ground in my garage, and when the clutch is depressed is the only time the throw out has any pressure on it. so if the noise is while your in gear, the throw out bearing should have nothing to do with it. the throw out pushes against the fingers on the clutch pressure plate to pull the clutch disc off the flywheel. when you release the clutch, the throw out bearing doesnt have pressure on it. correct me if im wrong.

[mrgreeneyes]

wow, could just be two beat transmission's... only thing i could think of, and this may be a LONG shot... is that your driveshaft is possibly exerting force on the trans causing it to be under constant strain. i dont know man, could be a lot of things....

[hungryjoseph]

some might correct me, but im looking at an old trans on the ground in my garage, and when the clutch is depressed is the only time the throw out has any pressure on it. so if the noise is while your in gear, the throw out bearing should have nothing to do with it. the throw out pushes against the fingers on the clutch pressure plate to pull the clutch disc off the flywheel. when you release the clutch, the throw out bearing doesnt have pressure on it. correct me if im wrong.

yeah that's what i'm thinking. that leads me to think i have two bad trannies, OR a bad pilot bearing.... can a bad pilot bearing do this?if it does then wouldn't the noise happen with the clutch in and out since the shaft is always in it?

[srpowered240sx]

yes, the pilot bearing/bushing can stays inside the flywheel, so it could easily be the culprit. the bearings in the transmission go out easily as well. did the new transmission come with any info on mileage?

[hungryjoseph]

i bought it from noyanusa.com, who is local to me. it came off an SR so i'm assuming the mileage would be that average jdm mileage, i have a ka lying around that i can slap on, but if it was the pilot bearing would it matter if the clutch was depressed or not? wouldn't it make the noise all the time

[srpowered240sx]

it would be a more constant noise i believe. but with the differences in pressure and rpm speed, the noise would change.

[hungryjoseph]

i have the exedy stage 2 kit, can i just use a KA pilot bearing from advanced auto for my sr?

[smocan]

if its your throw out bearing, it would make the noise when your clutch is engaged

[Didderson]

bah sry to lead u in the wrong direction man, looks like i was a little off. good thing for me thought lol, looks like I need to change the pilot bushing with another clutch someday.

[jetroy240]

yep, sounds like you got a bad pilot bushing. Remember don't put grease when replacing a new pilot bushing, or else dirt will accumulate on it.

[redsx13]

What was the problem? My car is doing the same thing!!!

[compactfean]

yep, sounds like you got a bad pilot bushing. Remember don't put grease when replacing a new pilot bushing, or else dirt will accumulate on it.

What! No, completely wrong. Put grease on it, otherwise you willbe replacing it within the year.