ZF6 Transmission
Thread Starter
Burning Brakes
Joined: Mar 2009
Posts: 830
Likes: 6
ZF6 Transmission
Team, have a problem. During my engine rebuild, my mechanic suggested we go with a stock replacement clutch and we resurfaced my single mass flywheel. The clutches from Carolina weren't holding up have gone through 2 in 10 thousand miles. Where I used to have the fork in a blender sound during idle now idle is quite and I get a ton of rattle under acceleration. none during cruise. Is the problem likely the clutch or something else. The flywheel has been surfaced and it almost sounds like the flywheel is rattling.
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
Does it sound like rocks in a can? If so, that's normal for a ZF with a SMF. ZFDoc can do a shim kit to eliminate that sound, but usually it's only heard at idle.
What clutch did you end up going with? I doubt it's a new clutch or fresh flywheel.
What clutch did you end up going with? I doubt it's a new clutch or fresh flywheel.
Drifting
Joined: Dec 2007
Posts: 1,672
Likes: 8
From: Sumter South Carolina
Going through clutches that quick isnt normal obviously. The rocks in can is only on idle in neutral. As soon as you push on the clutch it should disappear because of the pressure stabalizing the flywheel. Chatter is not too odd when starting slowly in first gear but just on acceleration? That isnt good. Id be more inclined to believe your flywheel is out of balance or the surface has been cut too deep so the pressure plate cant be as effective. If it were me id get fed up and order a 600tq clutch and flywheel (steel for added stability) from spec or something. Thats what I use and I track the crap out of the car.
Make sure you are propperly breaking in a clutch. Its so easy to be tempted to test it out without propper break in and the glaze the surface of the disk, then it will slip all the time and just magnify the problem eventually burning it out. Took me almost 1000 miles to break mine in finally before it started really grabbing. Now it is really nice.
Make sure you are propperly breaking in a clutch. Its so easy to be tempted to test it out without propper break in and the glaze the surface of the disk, then it will slip all the time and just magnify the problem eventually burning it out. Took me almost 1000 miles to break mine in finally before it started really grabbing. Now it is really nice.
Thread Starter
Burning Brakes
Joined: Mar 2009
Posts: 830
Likes: 6
New clutch resurfaced flywheel.
Thread Starter
Burning Brakes
Joined: Mar 2009
Posts: 830
Likes: 6
Going through clutches that quick isnt normal obviously. The rocks in can is only on idle in neutral. As soon as you push on the clutch it should disappear because of the pressure stabalizing the flywheel. Chatter is not too odd when starting slowly in first gear but just on acceleration? That isnt good. Id be more inclined to believe your flywheel is out of balance or the surface has been cut too deep so the pressure plate cant be as effective. If it were me id get fed up and order a 600tq clutch and flywheel (steel for added stability) from spec or something. Thats what I use and I track the crap out of the car.
Make sure you are propperly breaking in a clutch. Its so easy to be tempted to test it out without propper break in and the glaze the surface of the disk, then it will slip all the time and just magnify the problem eventually burning it out. Took me almost 1000 miles to break mine in finally before it started really grabbing. Now it is really nice.
Make sure you are propperly breaking in a clutch. Its so easy to be tempted to test it out without propper break in and the glaze the surface of the disk, then it will slip all the time and just magnify the problem eventually burning it out. Took me almost 1000 miles to break mine in finally before it started really grabbing. Now it is really nice.
