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View Full Version : Transmission slipping? Flywheel?


DriftChicken
10-13-2010, 10:11 PM
Hey guys! After sitting for about a year I decided to wipe the dust off my s13(w/sr20det) and start working on it again. The motor itself runs great! The transmission on the other hand I'm not sure of and I wanted to get opinions of other owners.

Currently I'm running a Spec stg.2 clutch with a Fidanza flywheel. Under normal conditions the car runs fine. I do notice that the engagement point on the clutch is pretty high, and it's pretty snappy in that the engagement is pretty crisp there's really not much play to be able to feather it. At least that's my interpretation when I'm driving it. My buddy says it's slipping. When shifting it shifts fine but when I go from a regular coasting speed and I get on the gas it feels like there's a really slight delay before it takes off and compared to the old KA it really takes off =)

I did some research regarding the ins and outs of flywheels. It seems that lighter will enable the car to rev up quicker but at the same time it requires keeping the revs up some. The lightened rotation mass might account for the slight delay?

I guess my question is geared(get it?) towards owners of clutch/lightened flywheel combo. Is it normal for the engagement to be so "instant?" I'm assuming so because it's supposed to be a stronger clutch. I also assume this accounts for the slightly stiffer pedal feel? Is what I'm experiencing the clutch really slipping or is it just the effects of the flywheel?

* keep in mind it's a new clutch/fw. It's got barely 10miles on it and it hasn't been driven since it got put in. I haven't been able to properly break it in since the car's not street legal yet, I don't drive it daily yet and I've only gotten on it a few times to get a taste of it. Mostly easy test drives around the hood. Def no racing or spirited driving. I'd also like to think that proper break in will resolve this issue?

Thanks guys!

Ray

zylvia213
10-14-2010, 10:28 PM
wow im kinda expiriencing the same thing.... I'll notice it on the fwy if im at 3 or 4 rpms and then I just punch it will slip kinda like when your clutch is going but then it grabs. It doesnt do it from stop to go or at low rpms its weird. In my case I know it cant be that the clutch needs to be replaced. I did my clutch about 1 1/2 ago (exedy stage 2 clutch and leighten chrome moly fly wheel) I dont track my car and I dont drive like a maniac so I know my clutch still has a lot of life left. Im kinda wondering what it can be. The other thing too I smell gear fluid at high rpm like on the fwy.

Sorry to thread jack but im also wanting to see what people say about these symptoms. I just hate the idea of pulling the trans down.

zylvia213
10-17-2010, 11:46 PM
wow no one out there with some helpful info??????

sil80tydriftmachine
10-17-2010, 11:50 PM
lighten flyweels are okay for what they are great for track and racing but for normal driving they KInda suck your better Off with a OEM FLywheel

jdm213
10-18-2010, 12:24 AM
lighten flyweels are okay for what they are great for track and racing but for normal driving they KInda suck your better Off with a OEM FLywheel


actually lightened flywheels are okay for dd and track, it also makes torq if you test it on the dyno and see the difference, but i think your clutch is slipping because your pedal isnt adjusted properly thats why the engament is too high there is a thread about this ... here ill spoon feed it to you just cuz im in a good mood
http://zilvia.net/f/s-chassis/297254-ultimate-clutch-pedal-thread.html

since you said the engagement is too high this will make ur enagement better and lower your only suppose to have like 1 inch of freeplay i gaurantee you will have no more clutch slipping, oh and dont run your clutch hard yet untill it has broken in :wackit::bigok:

jdm213
10-18-2010, 12:26 AM
wow im kinda expiriencing the same thing.... I'll notice it on the fwy if im at 3 or 4 rpms and then I just punch it will slip kinda like when your clutch is going but then it grabs. It doesnt do it from stop to go or at low rpms its weird. In my case I know it cant be that the clutch needs to be replaced. I did my clutch about 1 1/2 ago (exedy stage 2 clutch and leighten chrome moly fly wheel) I dont track my car and I dont drive like a maniac so I know my clutch still has a lot of life left. Im kinda wondering what it can be. The other thing too I smell gear fluid at high rpm like on the fwy.

Sorry to thread jack but im also wanting to see what people say about these symptoms. I just hate the idea of pulling the trans down.

maybe you need to bleed your clutch more, and or need new slave and clutch cylinder:2f2f:

DriftChicken
10-19-2010, 12:00 AM
i think your clutch is slipping because your pedal isnt adjusted properly thats why the engament is too high
Ding ding ding! This is actually what it ended up being. I did another search over the weekend and found a thread about pedal adjustment. We adjusted the pedal Sat night and it made a night and day difference. All the clutch issues I had been experiencing are gone!

Thanks guys!

Ray