transmission makin noise, sounds like rocks inside, lol

[dsylvia]

well i finally got my KA-t motor running. started her up and the transmission sounds like ***. sounds like theres rocks in it, lol. and the noise goes away when i step on the clutch.

installed is a clutchmasters aluminum flyhweel and clutchmasters stage 5 clutch. i dont know if the noise if from the flywheel and clutch, since the clutch is supposedly race only. or if the transmission is junk.

would this be clutch chatter? cuz if it is, its pretty friggin loud.

has anyone used either the flywheel or clutch that i have? and if so, did your car make noise also?

i havent tried driving the car yet. we're still buttoning things up before the road test. we'll see if the car actually drives with the transmission making the noises it does.

any info and help would be greatly appreciated. thanks.-Derek-

[XcreatureX]

did you use the same throwout bearing?....i have a 6 puke unsprung i get clutch chatter but it dosnt sound like rocks its just a jerky start

Seth

[dsylvia]

i used the throwout bearing supplied with the clutch.

[Tictakman]

is this a different engine than the stock one that was in the car? i swapped in an auto engine and didnt know that i needed a different pilot bushing for a manual transmission. had to take it back off and take out the auto one and put in the manual one. works good now.

Zak

[dsylvia]

now that you mention it, it may have been an auto.

[TheOne]

it sounds like a throwout bearing for some reason, have you heard corvettes and other chevy's with manual trans, you can hear the TB on those(aparently thats normal for chevy's, or most their cars)

[XcreatureX]

i had to use my old TB and when i put it all back togeather i forgot to spray it with WD40 or whatever cause it was kinda dirty...anyways it makes a noise kinda like that till i push the clutch in then it goes away

Seth

[C-Kwik]

This is likely because you are not using a sprung clutch disc. The springs on a disc help to damp vibration from the crank. Like the crank pulley, the flywheel and clutch see a lot of pulsing as each cylinder fires. Either a sprung clutch disc or a dual-mass flywheel is used to damp the noise.

Clutch chatter is actually something you feel as you engage a clutch. It will basically cause the car to shudder as you try and slip the clutch slightly to try and get a smooth start. This is typically a sign of a clutch that wasn't broken in, a clutch assembly that is contaminated, or a clutch with no marcel spring.

My usual recommendation for a clutch is to use organic clutch discs unless you absolutely need to go to a tougher material due to your torque output. And even then, step up to harsher clutches only if you need to. Having used even a semi-race clutch before, I intend never to have to again if I can help it. It was the most uncomfortable car I've owned and it was not even my fastest. Lucky for me, the clutch wore out quite quickly too, so I only had to live with it for about a year.

[dsylvia]

would you happen to know if the clutchmasters flywheel is dual or single-massed? cuz if its single, it seems to me that a combination of single-mass flywheel and unsprung clutch may be causing the aweful noise.

[XcreatureX]

i am 6 puke unspring on stock flywheel

Seth

[kapower06]

From the way you decribe it, my car makes the same sound and its the throw-out bearing...

[Florida240sx]

My POS clutch from autozone was making noise while it was still on the lift.The mechanic was stupid so maybe he F^ something.But had the clutch for over a year and after about too races it's too hot and will slip.Guess we'll see how long it last with turbo.1 night? 1 miute?Or maybe a bit longer.....

[uncle_louie83]

if you want to know what it is....my transmission does the same thing...it is the front bearing that is behind the plate inside the bell housing...if u unbolt that plate you will see the bearing...there is some play in your input shaft prolly...alot of 240's i am seeing have this problem...only thing you can do is have someone replace your transmission or get your current one rebuilt. It wont cause a problem for a long time...after awhile it will start to get notchy like a dsm. and then its time for a rebuild at that moment.

the reason why this happens is because usually the transmission has had the **** beat out of it be previous owners. Or it is because your using a very high strenght clutch like the CM stage 5 clutch... As mentioned before in the post, the sprung hubs take away the vibrations. But if your like me the stage 5. 4 puck unsprung hub disks, you will end up having that problem...only cure is to get your transmission rebuilt and have the syncro's beefed up...im debating on an automatic transmission cause i mostly drag race this car.

lewis

anyone know if they make a shift kit for the auto transmissions?

[dsylvia]

so if i was to get my spare transmission rebuilt, would the stage 5 unsprung clutch reak havoc on the transmission?

cuz i dont want that. maybe i should of just got the stage 4

[koukiKA240]

i have a clutch masters stage 5 4 puck unsprung disk with a fidanza flywheel. I have this same exact sound. When you drive it you will also here it around 3k rpms and when comming off the gas in gear above 5k (im not dogging my car i autox). I dont think its a transmission issue becuase i put 20k on this transmission before i went KA-T and upgraded the clutch. It made the noise the instant i started the KA-T for the first time so it didnt wear and begin to make the noise. I believe ive narrowed it down to the pilot bearing/bushing. Ive had throwout bearings go out on me before and they didnt sound like this. When i have a chance and access to a lift i will be replacing that pilot bushing. In the mean time its just anoying.

O and i used the clutchmasters pilot bearing but im willing to bet i got it in there crooked or something somehow.~Sam

[toki]

barely rest your foot on the clutch pedal, if it dulls or goes away then it is the TO bearing.

[dsylvia]

the throwout bearing is brand new. the one that came with the clutchmasters kit. im not sure why it would be the TO bearing, unless we put it in backwards, lol.

[pr240sx]

Pedal in noise out = internal transmission problem, probably the bearings.Pedal out, noise in = TO or clutch assembly problem.

If the transmission shifts ok but the noise still there, you can replace the affected bearing (if it is the mainshaft bearing or the countershaft main bearing.