So I have an LNF with almost 25,000 miles on it. Yesterday I was pulling out on a steep hill and I slipped the clutch pretty bad. Immediately after I'm shifting through the gears and notice the clutch is soft. Before that it was fairly stiff, that's gone. It has that "spongy" feel to it. I read the stock clutches are pretty shitty on these cars, so is this normal at that mileage or did I glaze it?

 

Prolly glazed... I'm no expert though

 

The stock clutches on these cars are great.

 

I don't know where you heard that the stock clutch for the lnf is garbage but you are sadly misinformed.

 

Yes they are good clutches for stock and basic tunes. Maybe you are thinking of the stock clutch on the supercharged cars.

Just be sweet on it awhile. Will probably feel much better in a week or two.

 

Ya my stock clutch held great on tune. Replaced it with stage 3 at 65k kms. Never had it slip on me. Only reason I replaced it is cause motor was out anyway figured do it now rather then going threw work of doing it later

 

was wet out and i just got my whooping SHITTY 27PSI tune and rosteddd em throught 1st then second then third then went to rost em through 4th and just sliippping the facccck outa my clutch... stiff for a day and smelt for a day and were back to normal... never do that again! lol

 

Stock clutch is awesome. It can handle a lot of abuse if your driving style permits it.

Although the thread I'm providing was meant to apply to the SS/SC, it should definitely apply to the SS/TC as well:

https://www.cobaltss.net/forums/driv...-inside-36130/

 

Stock turbo 27psi?

 

The stock clutch is very good, but once you glaze it, that's it. Done. I tried scrubbing it off by doing a variety of things, but it never would recover. Had tons of material left on it, and it didn't even look badly hotspotted, but it was done.

 

I glazed mine on my previous Sedan and was able to successfully bring it back and have it hold over 380ft/lbs of torque. Change of driving style and luck I tell you

 

27 psi on stock turbo? you dont ever learn...

 

Wastegate wasing opening... When I first got the car it was stock with a KN SRI I put the downpipe on and i was at 17 psi.. got tuned.... Canned tuned and was at 27 psi. pulllinnn like a mutherrrr fackka tho. lol i wont lie about that! Put the new turbo on and it was still at 27psi... Matt re tuned it and opened the wastegate through the tune we ate 21 now boy! and yes alot of people spike 27 psi on the stock turbo and go back down to 24..

 

How about driving the car properly.. Then your not abusing the clutch and making it wear prematurely... The lol's in this thread amuse me. You cant honestly think that slipping the clutch is good for it in any application! And no the same rules dont apply to the SS/TC as the SS/SC. There not the same clutch! and i dont agree with having to heat the stock Lsj clutch to get it grab properly as i think it's just driver error! there are quite a few high mileage LSJ's on the redline forums still on a factory clutch that have had many passes down the 1/4 and many auto X events as well with no glazing reported...

 

Troof! Once I glazed mine accidently it never recovered from then on and had to be replaced.

The biggest killer for the lnf clutches (aside for driver error/misuse of course) is plain and simple torque coupled with having a taller final drive gear than the lsj's. Having the taller 3.82 gear puts more strain on the clutch and then of course the lnf is pretty well known to produce quite a bit more low end torque compared to the lsj.

 

Apparently I was reading about the stock LSJ clutches being junk then. I'm usually pretty easy on mine and don't beat it to hell. I just slipped it on that hill bad on accident.

It seems to engage later now, I can really notice it when I'm pulling out. The other thing is when I shift into any gear it's sloppier. I can basically slide into any gear like nothing. This includes 5th and reverse which at times before I couldn't get into smooth all the time.

So do you guy think it's glazed? I'm going to be real gentle on it the next couple weeks and see what happens.

I'm still on the stock tune. I did a hard pull in 3rd afterwards and also mashed it from 2500 rpms in 4th and 5th to check if it would slip and it didn't.

 

The clutch has nothing to do with the shift lever action.

 

Tis why the LNF and LSJ do not share the same clutch.... And slipping it will put alot more strain on it than anything. if you think it's not designed to be abused as how many Launches did GM engineers do back to back NLS the **** of it.....? 600 or so IIRC with no breakage or glazing of the clutch... people are not the pro driver's they sometimes make themselves out to be. Not pointing fingers just saying!

 

If your pedal is somewhat squishy that's not necessarily indicative of a glazed friction surface. I'd more think you overheated the fluid in the slave and need to flush it.

 

My car has been doing the same thing for like two years. Holds the torque but engages way later and feels spongy. Im subd for more info on this. I made a stupid error one cold night two falls ago on my way home. from work. Pulled up to a stop sign and dropped my ipod on the passenger floor. So i leaned over to grab it.... Unfortunatly i stopped in third gear and being distracted i didnt realize it... Went to take off and goosed it a bit and smoked the clutch. Smelled awefull. Never felt the same since. It holds torque but engages super late in the peddle travel. I hate it. BUt utnil it starts slipping i cant justify throwing in a KY stage 3 or zzp stage 4... Not sure if it is even on its last leg because of this or just doesnt feel good..

 

Mystock clutch would hold from an 80 roll in 4th gear on my BNR. I did it strictly to see if it would hold and it did.

The Gmpp clutch I have is a monster as well. No slipping no matter how I drive.

 

Do you have an LNF or an LSJ?

 

He profile says 2010.

 

I ask because i havent heard of anyone using the Gmpp upgraded clutch on an LNF

 

True, but at the same time I really don't think they took into consideration the fact that it would need to hold 350+wtrq consistantly.

Oh wait I forgot to include a clever smilie face....