scoobyc

iTrader: (2)

Hi guys,

I just got my scoob and it seems to have a wee problem.

The first 4 pull offs when cold are really juddery. Like the clutch is either engaged or not, and it bounces from on to off to on etc.

Once the engine is warn there is no problem. Some gear changes are quite abrupt untill its warm also.

Is this my lack of skill, i understand the clutch must be quite hardcore to handle all the power so perhaps this is just how they are?

its a 98 sti v4 jdm

scoobyc

iTrader: (2)

anyone?

30psi

thats common on imprezas my sti3 does the same occasionally when its cold, and for the abrupt gear change when cold, u may need to top up ur tansmission oil.

just apply abit more gas in the morning

slipstream_uk

iTrader: (1)

Common problem on the classics, when they are cold. Mine does it now and then, Ive had my flywheel lightened and skimmed also uprated clutch fitted and it still does it every so often.

scoobyc

iTrader: (2)

ahh ok good to know.

I was thinking of ripping the gearbox off this weekend but if its common.

More beans it is then. i did notice the higher the beans the less Judder. Any tips to warm the car up? Could of clutch dumps in neutral? Double clutching?

My drive is at quite an angle, makes it a bit of a git reversing out with judder.

WRX_Dazza

get out and give a couple of launches. same with the brakes, they always benefit from a good stamping on now and again!!!

classic Subaru Si

Yeah, had a new clutch fitted last year, 2 weeks later and it started juddering again! A couple of rally starts will sort it mate!

30psi

very true, last time i had a clutch judder was in july (like periods ay) lol

Tenby

iTrader: (1)

Has always happened with mine

scoobyc

iTrader: (2)

You joking about doing a couple of full bore standing starts to fix it??

What is the actualy problem? Clutch slippage help?

I have not done a full bore start in the scoob yet. I fear it will wreck it.

classic Subaru Si

I've heard it clears a bit of the cr@p off the flywheel, which causes the judder! But it does calm it down a bit. Don't hit the limiter and just dump the clutch though, just give it quite a lot of revs, and slip the clutch!

Removed.

I've had that problem on at least 3 of my 4 Scoobys, and the advice I got from a couple of people was exactly that, a couple of aggressive starts, high-ish revs and let the clutch slip a little. It usually makes a big difference.

scoobyc

iTrader: (2)

I have done a couple of 1st gear full throttle, but only once the clutch is engaged.

Surley if anything is to be shifted off the fly that would have done the job?

I can only assume its some wearing of the clutch plates which is required? However after the car is warm this no longer happens.

Im not convinced by the fast standing starts, however i might give it ago.

s70rjw

iTrader: (2)

My Classic did it from new. 4.5k standing start every now and then solved it.

Ste RB5138

Mine judders when warm as well, its not done many miles since it was fitted. Does get annoying

Luminous

iTrader: (3)

Its slipping the clutch while using power that cleans it up. It does not matter how much power you use once the clutch is engaged, that is not going to do anything to help you.

If you have never done it before, and you don't even participate in the traffic lights grand prix then its going to feel really strange the first time you do it.

Mine has been juddering since I got it. Basically its a sign that I don't drive it hard enough. To fix it, dial at least 3k rpm, open throttle and slip the clutch a fair bit on launch.

The older the clutch the more you have to do it (or so it seems). I have to do that to mine roughly once per month.

scoobyc

iTrader: (2)

awesome. I have only had it 4 days took me 2 days to have the guts to boot it in 1st.

I shall give a good clutch slipping a go.

How do these cars stand up to launches? With so much power and so much grip i would imagine not very well?

tath

I gave mine an 8k sidestep with DCCD locked because it was annoying me so much and it worked fine

The clutch gave up a few weeks later mind


Other possibility is a bent tangential strap spring on the clutch from being too aggressive with a cheap clutch or bump starting it (bizarrely). in which case nothing will sort it except a new clutch.

scoobyc

iTrader: (2)

right gave it a 3k launch. I either lit all the wheels up as its cold and slimey, or the clutch slipped to hell.

If the wheels were lit there was no real squirm.

Holy jesus it shifts tho!

If anything it made the juddering worse.

tath

could be buggered then and nothing will sort it apart from a replacement. Sounds like it's not lifting evenly or the straps are bent.

richardg

i have the same problem now and then with my bugeye. someone on here (about 4yrs ago i think) suggested a few 4k launches. i was not convinced, but in wet weather one night i tried it and problem solved (at least for a little while)

now and then i do it again, when the roads are slippery. i was told there could be grime and dirt deposits on the clutch plates and that this would burn them off.

it's never made it worse though

scoobyc

iTrader: (2)

hmm actually. after the first pull away after the launch its been fine. Dunno what happened the first time. perhaps i just pulled away again to soon after the launch. sitll hot plates. i dunno.

stiler83

It's usually the release bearing mate. Well worth fitting an uprated one when changing the clutch plate and cover etc. Uprated ones are available from the likes of AP and STi.

escott

iTrader: (1)

Same for me - I did a fast start and after it seemed no different, but a couple of days later it seemed OK. Since then it's been much better, still get it a bit on cold wet mornings, but can live with it now.

scoobyc

iTrader: (2)

Very cold and frozen this morning and no judder.

Might give it another one at the end of the week. Just to make sure.

And oh my god does it shift!