clutch Experts!!!

[Adydas]

Anyone know what a Shudder under power from the clutch would be a sign off.. I have installed an exeedy 4 puck clutch and have had the car returned to me for checkups as under rpm the car has a wicked shudder allmost like its miss balanced but i find that hard to belive as i had the crank and clutch balanced by pros..

so.. Shudder only under clutch motion..

Clutch is very simlar to this..



As seen here..

[flygt4]

when do we see dyno results?

oh and i assume you had flywheel machined and all that jazz?

is it when driving or only on takeup?
puk clutchs can be pretty nasty/bitey sometimes on takeup.

[Adydas]

i see dyno results been avalible when i sort this out.. the cars at my house..
i need to fix this issue before they will dyno it.. its driveable now i just moved it in the garage but its a nasty shudder i just dont know if its ment to be like that, also it hasnt been bedded in so perhaps that will play apart either way i need to fix this before its dynod and compleated!!!!

Correct, the engine builder put the Crank, and the clutch into a machine and balanced it perfectly gave me strict installation instructions to keep the balanace, the plate had to be here, the bolt with the black dot had to go here, the white dot had to go there etc so a very detailed job was done on the balance but this is the first time since then the cars moved that plate around, so how do i know if its right.. wrong? whats wrong? how to fix it?

[Dell'Orto]

If the clutch plate is bent on installation it can do that. You know you can't slip paddle clutches though right?

[Adydas]

even when engaded it didnt sound good, since posting ive got the starter motor out, dont look to good 2 tooth are freshly missing a tiny part of them..
Small concern but at this stage not the answer..

[pc]

sounds like something seriously wrong, bolt fallen out of clutch plate?
I reckon pull it apart and check everything.

Was the flywheel skimmed? and were the dowels removed and the same amount taken off the outside?

[Bumpy]

I just put a 6 puk paddle in my starlet. When ya takin of at the lights, if the revs arent too high, it can shake the whole car, but get the revs a little higher and it all dissapears.

All I can think of, and will be the same in your situation, will be the sprung centre, when the clutch starts to bite, it jumps around on the springs.

[pc]

Umm, I may have mis read it... is the problem while engaging the clutch? or while accelerating from say moderate revs with the clutch already engaged?

[gmacrae]

some paddle clutches shudder on engagement more than others. Or if its shuddering when its engaged and all clamped up tight there's gotta be an imbalance in the pressure plate or something.

[jondee86]

One famous American clutch manufacturer had this to say in their FAQ...

What could be the causes for clutch judder (chatter or shudder)?
Judder can be the result of any number of problems. Possible causes
may be as follows:
1. Improper break-in procedure.
2. Flywheel was not properly resurfaced before the new clutch
was installed.
3. Flywheel is not parallel, or the friction surface is out of parallel
with the crank flange surface.
4. Flywheel was not resurfaced properly or has an improper surface finish.
5. Flywheel has severe hard spots or hot spots.
6. Flywheel has an improper step or cup dimension.
7. Damaged or excessively worn CV joints.
8. Bad u-joints in driveshaft or u-joints misaligned.
9. Excessive backlash in differential.
10. Excessive driveline angle.
11. Bad leaf springs, bushings or mounts.
12. Improper gear ratio versus tire diameter.
13. Defective pressure plate and/or disc.
14. Disc has inadequate or no marcel—not enough cushion between
friction facings.
15. Oil or grease contamination on clutch facings.
16. Worn or damaged clutch linkage.
17. Bent cover assembly and/or disc.
18. Improperly tuned engine.
19. Worn or damaged engine mounts or transmission mounts.

Might be something helpful in there

Cheers... jondee86

[Adydas]

Problem solved.. none on that list.

[pc]

Problem solved.. none on that list.

So the problem was?

[Alex B]

So do you want us to keep guessing or.......

[Adydas]

Bearing installed the wrong way around.. wouldnt fully dissengadge..

[jondee86]

Was it the..... Spigot bearing

edit.... Damn... too slow

Cheers... jondee86

[Alex B]

How did that happen, dont they have a cage for the fork?

[Sick Puppy]

Bearing installed the wrong way around.. wouldnt fully dissengadge..

Okay, so what now? is there any damage, do you have to start from scratch?

Dammit, I wish I had gotten into cars earlier!

[flygt4]

LOL, you did well to pull the gearbox that quick. not a job i'd be rushing into

[Adydas]

Not here to $&#$% spiders mate!! :p

Yeah its all apart no damage basically what was happening was the clutch wasnt fully dissengadgeing im guessing there for slipping and with a 3 puck surface it was vibrating.. like made while nothing else was happening.. suck..

But this week ill begin putting it back together so im ready to fit it into the car this coming weekend..