Rattle when clutch is let out after clutch/flywheel replacement

[95se]

I just had the new exedy stage 1 clutch and fidanza flywheel put in. Things feel good but there is an annoying rattle or buzzing sound that starts right when coming off the clutch pedal and it goes away right when you press down on the clutch pedal. Its mainly noticable during deceleration or coasting when in gear and also during slight acceleration. It sounds like its coming from the front. It comes and goes and it isn't always there and it varies. I kind of had this before at times before the clutch and flywheel were put in but its more prevalent and noticable now. Also its a different pitch too.

[jskateborders]

you replace the tob?

[Hywarp161]

yeah it sounds like the throwout bearing.

[95se]

Yes the throwout and pilot bearings were replaced. They came as part of the clutch kit. The owner of the shop also thinks its the throwout bearing. He told me to drive it over the weekend and see if everything just needs some breaking in. If its still doing it they'll go for the tob. He said he thought it could be the input shaft of the transmission but says letting off the clutch shouldn't affect that because it should still be turning so it really sounds like a tob issue. Maybe even adjusting the clutch pedal could help but not sure at this point.

[Shift_Dr1ft]

A lighter flywheel will give you that rattle noise. It will slightly change the tone of your engine. On the safe side just let your mechanic check on it, can be what people say like your throw out bearing or your flywheel not torque to spec.

[95se]

I have never heard this before.. I did a lot of research on here and everyone who had the fidanza fw said they had no wierd noises or rattles. Just revs quicker which I am suprised I don't really notice that that much just the rattle noise but its only when I'm not clutching. As soon I step on the clutch it goes away. Its not there at idle. Usually happens when I have just let off the accelerated then it buzzes then kind of stops after a couple of seconds.

A lighter flywheel will give you that rattle noise. It will slightly change the tone of your engine. On the safe side just let your mechanic check on it, can be what people say like your throw out bearing or your flywheel not torque to spec.

[95se]

So do most of you think its the throwout bearing or mabye the idler bearing in the transmission or something else??? If its the idler bearing I guess I have to get a rebuilt tranmission, correct? I take it back tomorrow for them to hopefully figure it out so I need as much knowledge as I can get now.

Thanks

[95se]

I took it back today and he says he thinks it might be a bearing inside the transmission or the clutch needs more breaking in possibly. He doesn't think its the throwout bearing because when the clutch is engaged there is pressure on the the bearing so it shouldn't make any noise.

[Koopa Troopa]

Adjust your clutch pedal.

[95se]

Adjust your clutch pedal.

why what would that do? The clutch pedal is in perfect position and there is just a tad bid of play at the top.

[Koopa Troopa]

Adjust the throw of the fork. Different clutches have different engagement points. Throwout bearing could be sitting ontop of the pressure plate causing a vibration... My only thought. If I'm wrong then it's prolly your transmission = fucked.

[95se]

Adjust the throw of the fork. Different clutches have different engagement points. Throwout bearing could be sitting ontop of the pressure plate causing a vibration... My only thought. If I'm wrong then it's prolly your transmission = fucked.

The throw of the fork is one of the things my mechanic mentioned it could be. He also said maybe a bad bearing inside the transmission. The transmission didn't make near as much noise before, at least not like this. The sound varies more now. The shifting does seem to be pretty smooth. Exedy tech replied back saying he thinks the clutch needs to be broken in more and its because its a racing clutch. Here is what he said "It is due to the change in torsional dampening system on the clutch disc. The spring rate needs to be changed because of the heavier clamp load on the pressure plate. It should smooth out a bit over the next few hundred miles."

[95se]

My auto shop had their transmission place look at it but he had know idea what it was because in 4th gear he said the noise wasn't there and it should be because the entire transmission is engaged at that point so it couldn't be the transmission. But the the noise is there in every gear with exception of 5th, though, I think its filtered out by road noise and all at higher speed in 5th gear. So I don't think he listened well enough. Its very noticable in 3rd and 4th around 40mph. The tech at my auto shop that has worked on nissans said his best guess is that it was a bearing inside the tranny which is what the owner also said to begin with. The tech guy recommended me take it to Urban nissan because there was someone there that had a lot of experience (30yrs) and the most well known for working on nissans in the DFW area so I did that today. He said it was the bearings inside the transmission which there are 5 of them. He said he could tell it had to be inside the transmission because when you rev the engine to 2000rpm in neutral you could hear the noise and it would go away when you pressed in the clutch. The advisor quoted me about $1000 for labor and $500 for the parts so about $1500 to have it rebuilt which would mean heating and pressing the bearings in. He said they could end up finding something else wrong like the reverse gear being rounded off, guess that might be a common problem which would add to it. So I asked him how reliable the rebuilt was and he said if AJ does it it should be fine. Just that they could find a gear where the end of the teeth are chipped or something. I asked him what about a new one and he quoted about $2500 total for it One yr warranty for parts/labor. So those are my options. Was wondering if anyone had experience with rebuilds or new transmissions. What would you all recommend? I'm not interested in a used trannsmission since it could have been abused. Don't feel comfortable with that.

[lechu84]

WOW, i am having the same problem!!. just installed the same clutch, exedy stage 1 but with stock fly wheel. i had fun with the first couple months, then 2 weeks ago, i go on a canyon run with my buddies and start having the same symtoms as yours. the buzzing from 2nd to 4th. thinking it was the TOB, i decided to leave it. later that night the buzzing turned into a loud abnoctious "cloking" sound. the cloking sound would only happen when im not stepping on the clutch. it sounds like it is coming from the front. well i have my s13 in the air right now trying to figure out what the hell it is. no luck yet. Imma throw in my spare tranny and based on the above, if its a baring in the tranny, it should go away. ill let you know what happens, Good luck bro.

[S14DB]

I say adjust you pedal too. Your TOB needs to be held on the pressure plate or it will rattle. Sort of like a little pre-load.

[spicywhitemustard38]

I have had an exedy clutch and flywheel in my car for about three years w/ slight to no noise in the tob. Nothing more than your usual tob spinning noise.I self inflicted some damage on my s13 by doing a 5k dump in reverse.(dont ask :( ) Ever since then there has been a wicked sound while the clutch is not depressed and is absolutely quiet when you depress the pedal. Everyone told me throw out bearing, replaced it, and it is still there. Im thinking my problem might be in the front bearing in the tranny. From what ive heard from old z cars to the sx the front bearing is known to go out. Gonna do some more investigating tomorrow. But if you say the noise goes away in 4th but is present in any other gear i might suspect a bearing on the countershaft. imo

[lechu84]

^ it did go away in 4th. but eventually it was also heard.

ive also been told it was the first baring of the tranny. maybe theres something to that lol

[95se]

I think the advisor told me the tech said that he knew it was a bearing inside the transmission because when you rev it in neutral to 2K rpm and press down on the clutch it goes away. Does this sound right?? I don't know anything abt transmissions but I think thats what he told me.

[godsmack]

Sounds like ur pilot bearing. If you have an sr20det imo throw in a z32 tranny with adapter kit and put together by mazworx for under $2k rather than rebuilding the old tranny.

[95se]

no one has said its possibly that. I have a stock KA. Is there anyone here almost sure they know what this is?

[spicywhitemustard38]

Put my car on the lift. Sat in the car and worked the clutch. My noise is def. in the gear box. Had someone under it listening very closely to the area of noise. I suggest you do the same. It should be pretty obvious the concentrate of the noise. So im just gonna buy a spare trans. and run it till it gives up.

[gyula hlavati]

I had the same problem when I installed my Exedy OE style clutch with Fidanza flywheel.I replaced the tob and pilot bushing at the same time.After like 2000 miles the rattle sound went away.No probs since then.

[95se]

^ it did go away in 4th. but eventually it was also heard.

ive also been told it was the first baring of the tranny. maybe theres something to that lol

I don't know the tech said replace all 5 bearings.. i guess because there is no telling which one it is and if one is bad the rest will be bad soon since they are all the same age. The noise by the way does go away in 5th or at least I cant here it there but is obvious in 1-4. Also, a couple of days ago I noticed that the car is now starting to shake more when you balanice the gas and clutch at slow speeds to keep it from stalling. I think Im having to push the clutch and gas pedals down more to balance it and when I shift from gear to gear like into 4th especially. All of the sudden its not smooth as of a few days ago. It like jerks and you can feel it in the steering wheel. This problem only got noticable really after I took it to the dealer a couple of days ago so they of course wouldn't have noticed that. The clutch probably now has close to 1K miles on it. The other noise that sounds like it is in the tranny sounds the same maybe a little louder.

[ZX88]

lighten flywheel will cause a low rattle sound its kind of like a low drone sound. mine did the same thing from day one.

[Bigsyke]

Maybe its a striking pin that walked its way into a bearing.

[95se]

lighten flywheel will cause a low rattle sound its kind of like a low drone sound. mine did the same thing from day one.

yes i think i kind of have that too but the noise I'm talking about is different and doesn't sound right. It varies and is high pitch.. very annoying. Terrible in 3rd and 4th around 40. Always starts right when I take my foot off the gas. I wonder if the Amsoil fluid is causing this. They put in the factory called for weight.

[S14DB]

It could be when you replaced the fluid the varnish or other deposits washed off and wear was exposed. How long was the old fluid in for?

If the new fluid was incompatible you would notice it in the Block Rings and Sycros first. Bearings would take a lot longer to wear improperly.

They did use AMSOIL - Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG) (http://www.amsoil.com/storefront/mtg.aspx) ?

[sbanzer123]

my exedy oe replacement does this too. but it will only do it the first few times i let the clutch out every time i start driving the car after it sat for a day or to. i just let it go, its done it for 3 years.

[95se]

It could be when you replaced the fluid the varnish or other deposits washed off and wear was exposed. How long was the old fluid in for?

If the new fluid was incompatible you would notice it in the Block Rings and Sycros first. Bearings would take a lot longer to wear improperly.

They did use AMSOIL - Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG) (http://www.amsoil.com/storefront/mtg.aspx) ?


They were suppose to use whatever it called for. He did say they put in 75W-90 in the tranny but not sure what they put in the diff. I noticed there are 2 different kinds of 75W-90's. I think they both say GL-5 but not GL-4, though, they say compatible for axles requiring a GL-4 but I assume that means the rear end not the tranny. The FSM for the 240sx says GL-4 for tranny and GL-5 for rear diff. I had Castrol syntec in it before which was replaced 2 yrs ago and before that was put in back in 2001. I had a low growl from rear end or tranny before but didn't sound near as loud and wasnt variable like this noise. This noise is also there at times at constant and during accel. Though, more noticable right when you take ur foot off the gas.

[S14DB]

They were suppose to use whatever it called for. He did say they put in 75W-90 in the tranny but not sure what they put in the diff. I noticed there are 2 different kinds of 75W-90's. I think they both say GL-5 but not GL-4, though, they say compatible for axles requiring a GL-4 but I assume that means the rear end not the tranny. The FSM for the 240sx says GL-4 for tranny and GL-5 for rear diff. I had Castrol syntec in it before which was replaced 2 yrs ago and before that was put in back in 2001. I had a low growl from rear end or tranny before but didn't sound near as loud and wasnt variable like this noise. This noise is also there at times at constant and during accel. Though, more noticable right when you take ur foot off the gas.
Castrol USA - SYNTEC Gear Oil (http://www.castrol.com/castrol/sectiongenericarticle.do?categoryId=82915494&contentId=7036193)

Castrol Syntec is GL-5.

[95se]

I think Ive decided to just get a new transmission. I can get one wholesale price for 1500-1700 instead of rebuilding it. Just hope it performs like the original.