I have no experienced tuners in my immediate area and the exedy left me without enough clutch to make the drive to Orlando from here so some local hot rod builders put in my Aussie clutch and took out the exedy which consist of two metal disk with no material on them after 4500 easy street miles--now the car has a noticable vibration that scares me drive it I feel like it will destroy the crank bearings etc--I know the clutch was balanced before shipping is there anyway it could be installed wrong--its not the drive line as it has the same vibration in neutral like the flywheel is out of balance or something---I did get a couple of miles on this clutch however and it grabs like a bitch, has easy pedal and I could not be happier with the overall performance of the clutch--any input would be great---thanks bill

 

I would personally not put in a clutch/pp/flywheel without getting it ballanced even if it "comes balanced"!

When I had a Mcleod set up put in the car, I told the installer I wanted the stuff balanced. He said it comes balanced. I said, "I know - I am going to pay extra to balance it anyway." Needless to say, he knew better and did not balance anything.

The set up had vibrations. I made him pull everything, send it out to get balanced and put it back in - same parts. Problem gone.

 

I had a similar problem in my 6spd Z28 Camaro. It drove me absolutely nuts. I went with a spec stage 2 Kevlar clutch. I ended up not liking the clutch anyway so I bought a new LT1 disc and put in a new pilot bearing as well. I even had the flywheel resurfaced a second time. Neither of those fixed the problem so I am guessing it was the new LT4 pressure plate. My recommendation is make sure you buy everything together because I believe the disc and pressure plate should be balanced together. Mine certainly were not.

 

Jeff (washguy) sent the assembly in personally for balancing before sending it to me and all the others that have been installed have done well it could be the shop that balanced this one made a mistake or something we will see but I can tell you that so far I love this clutch it drives great and grabs like a bitch I will deff be using this clutch--

 

my whole assembly was balanced together and I think it may have just been a fluke--this is going to be a great clutch you will know as soon as you drive one--I have had a bad run with everything I have touched on this car lately and its just the luck of the draw--

 

 

Bill, did they balance the clutch disc's and pp and FW together?
If so it's been done wrong unless you know for sure your engine is a zero balance motor. The flywheel should be balanced to the engine, then the clutch package should be a zero balance.
PM me I can help you.
Bob

 

We are thinking from what the mechanic said about the paint marks for the balancing that he did not line up the marks properly and that is why it is vibrating so this would seem to be the problem---

 

Hey Bill;

I just finished installing the OZ700 Aussie clutch into one of my customer's cars, 2001 ZO6. Very nice clutch, no vibrations, no chatter. It sounds like you might have a 'simple' install issue. (I say simple but we know it is a PITA to drop the whole mess and do it right!!). In actuality, you shouldnt have to drop the whole drivetrain to re-clock the PP to the balanced paint marks on the flywheel. I would first try to just drop the exhaust there and the clutch inspection cover, then roll the motor and remove each pp bolt (6 total) then pry the pp away from the flywheel & turn it to the correct clocking. I can see how it is easy to install the pp out of phase unless the installer takes the time to swap the pp alignment pins over from the stock flywheel over to the new flywheel.

One thing I also do before I install a new clutch and new flywheel is I lay the old flywheel on top of the new one, phase them together as they would go onto the crank, scribe marks onto the new flywheel out at the very edge at any spot where on the old flywheel has factory installed balance/ballast pins. This way, if the new setup, even though it is 0 balanced, still vibrates very badly, this way I can simply install the factory weights from the old flywheel into the same positions onto the new flywheel with only having to drop the inspection plate. Just a back up plan to make things easier.

Robert Judd / Gen 3 Motorsports

 

Great news on that the Aussie Clutch works well! Does it have the "stock" feel in the pedal or is it an off/on switch?

Second question: How is it that a Big Time Manufacturer of a clutch can not balance it as well as a "local" machine shop? Presumedly the the Big shop has better equipment than the Little shop?

 

remember, the drive shaft still spins when the vehicle is in neutral and the clutch is out. It still could be your driveline support. Press the clutch in and see if your vibration goes away. Nice to know how happy you are with this Aussie clutch even though you picked up a new vibration----most people would view this as bad. Keep us posted on what you find

 

Looks like this issue is being resolved. The mechanic who installed the clutch, installed the clutch wrong...

http://forums.corvetteforum.com/show....php?t=1036761

 

does anybody know if the Exedy Twin pressure plate/disk/flywheel are zero balanced?

Great tip from the experts...mark your new flywheel where the old flywheel weights were, then you can easily weld them on later if the vibration is too great!
Thanks.
John

 

Thanks Robert we will attempt this today its worth a shot I don't see how a few miles at low rpm would have caused any damage--but the marks are not lined up so as suspected it was installer error--

I will shortly have further impressions on this clutch but I can tell you from the few miles I put on it, it is everything they say and more-I can't believe how streetable it is particullarly for a clutch that grabs like it does--anyone that tries it will love it--

I would still like to get some pics up of the disk from the exedy it is nothing but bare metal rings--