Drivetrain Transmission, LSD, Clutch, Driveline, Axles...

Replaced blown LNF clutch with GMPP clutch from CED

Old Feb 26, 2013 | 01:04 AM
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Replaced blown LNF clutch with GMPP clutch from CED

Will let the pictures speak for themselves



Old (clutch shredded to pieces down to the bare metal, pressure plate is blue from the heat) LNF clutch:

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New GMPP clutch from CED:

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Now going through a break in process...
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Old Feb 26, 2013 | 01:44 AM
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Holy fudge batman!!!
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Old Feb 26, 2013 | 01:52 AM
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oh dam not good.
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Old Feb 26, 2013 | 03:02 AM
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Lmao wow thats crazy. Just got the same clutch put in today. Good so far
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Old Feb 26, 2013 | 09:34 PM
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Drove it around town pretty conservatively for the last couple of days. Just drove it around the block to do about 25-30 "put-put-put" around the neighborhood stop and go's... Now it's sitting in the driveway cooling off..
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Old Mar 2, 2013 | 09:26 AM
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you don't need to break it in. all it needs is one heat cycle, and you are good to go.
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Old Mar 2, 2013 | 09:43 AM
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^^^ but you may need a driver mod. Get the foot off the clutch once engaged between shifts. OFF the clutch. Left foot back to the deadpedal, not hovering over the pedal. at all.
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Old Mar 2, 2013 | 09:49 AM
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You should bed it in like you would brakes or anything else that uses a friction material on metal surface. The better you bed it in and apply friction material into the plate the better it will work. I'd give it a couple of heat cycles and some easy to moderate driving to get the pores open and materiel embedded in them, then drive it like you stole it once it's nicely bedded in. Don't need to baby it but don't get after it too hard for a couple heat cycles then good to go.

Think of it this way, a race track holds better once it's been rubbered in, right? The rubber tires stick better to its own material than the track. Same effect occurs with brake rotors and pressure plates. Bed them in and they work better because the friction material sticks better to itself then the actual plate or brake rotor. Once brakes are bedded in they stop much better, and once a clutch is bedded it it holds more torque.

Do it properly when the clutch is new and it'll work better.
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Old Mar 2, 2013 | 09:51 AM
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Originally Posted by Powell Race Parts
^^^ but you may need a driver mod. Get the foot off the clutch once engaged between shifts. OFF the clutch. Left foot back to the deadpedal, not hovering over the pedal. at all.
And that too. Heat makes them slippery no matter what. resting your foot on the pedal ever so much still can apply pressure and cause heat/slipping which makes even more sliping. vicious cycle.
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Old Mar 2, 2013 | 11:13 PM
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Originally Posted by Powell Race Parts
^^^ but you may need a driver mod. Get the foot off the clutch once engaged between shifts. OFF the clutch. Left foot back to the deadpedal, not hovering over the pedal. at all.
Thank you, John. Already do all those things. My foot only hits the clutch for the shift. No hovering. Nothing like that.. Like I said, the wife started it hard from the 4th gear , and the guy before me most likely didn't know how to drive it, neither did his wife.

Either way, thank you for the pointers, your input is always appreciated.

Originally Posted by Sox-Fan
You should bed it in like you would brakes or anything else that uses a friction material on metal surface. The better you bed it in and apply friction material into the plate the better it will work. I'd give it a couple of heat cycles and some easy to moderate driving to get the pores open and materiel embedded in them, then drive it like you stole it once it's nicely bedded in. Don't need to baby it but don't get after it too hard for a couple heat cycles then good to go.

Think of it this way, a race track holds better once it's been rubbered in, right? The rubber tires stick better to its own material than the track. Same effect occurs with brake rotors and pressure plates. Bed them in and they work better because the friction material sticks better to itself then the actual plate or brake rotor. Once brakes are bedded in they stop much better, and once a clutch is bedded it it holds more torque.

Do it properly when the clutch is new and it'll work better.
Originally Posted by Sox-Fan
And that too. Heat makes them slippery no matter what. resting your foot on the pedal ever so much still can apply pressure and cause heat/slipping which makes even more sliping. vicious cycle.
Thank you, Sox fan. I just got done bedding in my brakes a few months ago (went with police/emt break in/bead in procedure)... Now they work flawless.

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Old Mar 2, 2013 | 11:25 PM
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Good info here , how many miles on the car?
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Old Mar 2, 2013 | 11:30 PM
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Originally Posted by gotboost?17
Good info here , how many miles on the car?
About 58K. And I will say it again... if it wasn't for my wife using it as "training wheels", it would probably still be good for another 10-20K at least.

But what's done is done. Clutch is replaced. She doesn't want to drive manual again. Moving on with life.
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Old Mar 2, 2013 | 11:43 PM
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What are your mods? Interested in how the gmpp handles the quick spool and torque of a bolted/tuned lnf as I may be looking into this clutch next year.
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Old Mar 2, 2013 | 11:56 PM
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Ill most likly grab this clutch when its time, im asking because i have about 55kms on mine, an she took a beating, it was stalled on a dyno with the dyno brake on, they payed for it tho, clutch got real glazed an sliped for a few days now its fine,
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Old Mar 3, 2013 | 03:47 AM
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Originally Posted by 09BlueBaltSS
What are your mods? Interested in how the gmpp handles the quick spool and torque of a bolted/tuned lnf as I may be looking into this clutch next year.
I'm slightly modded, all I can tell you is that it easily holds 23 psi on a stock LNF turbo...

Many people stood by this clutch, so I decided to go with it. I was deciding between this and a KY stage 3, but decided to keep my clutch as the weakest point between engine and the tranny...

Originally Posted by gotboost?17
Ill most likly grab this clutch when its time, im asking because i have about 55kms on mine, an she took a beating, it was stalled on a dyno with the dyno brake on, they payed for it tho, clutch got real glazed an sliped for a few days now its fine,
I've only had it for a week, but I would recommend it. Can't go wrong with GMPP stuff... This clutch is originally made in Germany for Saab (iirc, same motor, heavier car, so should hold down torque well)...
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Old Mar 3, 2013 | 11:32 AM
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do u have a link, i cant find it
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Old Mar 3, 2013 | 11:35 AM
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Is this the same GMPP Clutch the LSJ guys use?
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Old Mar 3, 2013 | 11:45 AM
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I'm heavily debating whether to go with this or clutchmasters stage 4. Don't mind spending the extra 200 for the CM, just wanna make sure to do it right the first time so it lasts me a while.
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Old Mar 3, 2013 | 01:44 PM
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What did you do with the flywheel? Get a new one or resurface?
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Old Mar 3, 2013 | 03:09 PM
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Originally Posted by gotboost?17
do u have a link, i cant find it
You'll need both the kit and 6 (six) LNF pressure plate bolts from the second link (GMPP clutch only comes with LSJ bolts):
Ecotec LSJ Clutch Upgrade Kit 19212712
LNF Pressure Plate Bolt 11570368

Originally Posted by WSFrazier
Is this the same GMPP Clutch the LSJ guys use?
Yes. After reading a few threads on it it seemed like a very good choice for my application.. Even though it's rated at 300, people seem to have them running with up to 400 TQ iirc. John from Powell Race Parts has installed many of these.

Originally Posted by ShawnW117
I'm heavily debating whether to go with this or clutchmasters stage 4. Don't mind spending the extra 200 for the CM, just wanna make sure to do it right the first time so it lasts me a while.
GMPP clutch, while having a higher holding capacity, behaves as a stock clutch. With most of higher capacity clutches you will have different pedal feel and clutch chatter. If you resell the car, to many people in general public an aftermarket clutch takes a bit of getting used to.

Also, if you get a clutch that can hold more than your transmission... you see what's next there.

Originally Posted by ChriSS09
What did you do with the flywheel? Get a new one or resurface?
Resurfaced. It was still good at 58K.
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Old Mar 3, 2013 | 03:14 PM
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Awesome I'm about to get a new clutch too and heard some rumors about resurfacing, thanks for letting me know
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Old Mar 3, 2013 | 03:15 PM
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That's what I have, but I'm waiting for install. It may be awhile. What's the break in process? 500 city miles, stop and go or is there more to it than that?
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Old Mar 3, 2013 | 03:16 PM
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The TOB you get with the kit is an LNF one correct?
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Old Mar 3, 2013 | 03:20 PM
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I thought the GMPP clutch was the LNF clutch. So this is an upgrade from stock but only slightly? The stock and this are different numbers ? If they are different I had no idea.
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Old Mar 3, 2013 | 03:23 PM
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From what I understand they use some same parts, but the whole is greater than the sum of it's parts. Meaning it holds more than advertised and some things are the same, but ultimately it's not identical
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