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Thread: G8 GXP Clutch swap

  1. #1
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    Default G8 GXP Clutch swap

    I finally amased all the parts I needed for the clutch swap.
    C7 clutch and flywheel
    new master
    new gxp slave
    remote bleeder
    braided clutch line
    hurst shifter
    sound deadner
    The camaro ss clutch line fits the GXP slave and master. See picture

    I am reading about the clutch swap process, tips and trick etc on this forum. What I am not able to find a definate answer for are

    What clutch fluid to use ? DOT3 or DOT4 ? I also read somewhere that our cars are not compatbile with the synthetic fluids with better specs ?

    Torq specs - I was able to find info that Greg, CP and Ray posted on the L76 and LS3 engines. I cannot find any info on the torq specs on the clutch bolts, flywheel bolts, slave cylinder bolts, transmission bolts and belhousing bolts

    Specs for our car for adequate bearing travel ?
    http://www.tickperformance.com/tick-...im-kit-3-pack/

    4. Removal procedure - I have read that to remove the trans from the belhousing 1st and then the belhousing to get to the clutch. Any more words of wisdom?

    looking forward to you guys insight and comments
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  2. #2
    Formerly HSV-GTS-300 Crazy Paul's Avatar
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    Clutch fluid Type DOT 4 or Super DOT 4

    Torque Specs when using stock GM Fasteners.

    www.crazypauls.net/Eng%20TQ.pdf
    www.crazypauls.net/Clutch%20TQ.pdf
    www.crazypauls.net/Trans%20TQ.pdf
    www.crazypauls.net/DS%20TQ.pdf
    Crazy Paul
    Your Holden Parts Connection in Australia!

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    Formerly HSV-GTS-300 Crazy Paul's Avatar
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    Crazy Paul
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    VIP Member BuildItYourSelf's Avatar
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    I posted to remove the trans from the bell housing first.
    But when you install don't tighten the bell housing to engine bolts. You need it loose to help with alignment of the slave bearing sleeve.

    Also it helps to lossen the engine mounts and jack up the front of the engine to gain more room to get at the top bolts.
    2008 GT-M. PBM, #885

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  8. #5
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    Screamin what is the power ratings for the c7 clutch?
    2009 G8 GXP - MSM/M6/Vararam/Sunroof/35%Tint/Partial Debage

  9. #6
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    Why a C7? I have the LS9/ZR1 set up in mine.

    But the C7 wasn't out then
    2017 Chevy SS / OrangeBlast / A6/ Spare/ Roof - hers
    2016 Chevy SS / Jungle / M6 / Spare / Roof
    2013 Chevy Avalanche / Z71 / FGM / Roof
    2009 Pontiac G8 GXP / SBM / M6 / No Roof
    1988 Volvo 740 Turbo Wagon (modified)
    2009 Saab 9-3 Combi / 2.0T

  10. #7
    Addicted Member bracketracer's Avatar
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    I can possibly answer that question. I ran a Katech LS9R clutch set-up in my GXP that only survived 75 1/4 passes in 1 year and had to be replaced. Admittedly I launch a 4200 lb race weight car on drag radials at 4,000-5,000 rpm a few times a year, but I expected more out of a clutch rated to support over 900 lb/ft of torque, when I'm only putting 416 lb/ft of torque to the ground myself. I am now running a Monster LT1S clutch/flywheel with a Heavy Duty Corvette Master Cylinder & Slave Cylinder. The clutch pedal is much heavier, but it has held up great road racing at Road America and drag racing with launches of up to about 4250 so far. If it is still performing this well a year from now I'll be thrilled!
    Joe Morgan, G8 GXP Registry Organizer, G.O.N.E. Organizer
    2009.5 G8 GXP WH 6M onyx/red no roof 12.921 @ 108.89 BONE STOCK! (then), (now) 12.344 @ 110.92 with 1.688 60' at 766' DA, PB with new cam & tune 12.191 @ 112.35, 2:59 Second Lap Time Road America (Goodyear RS-As & Hawk HP Plus pads with stock rotors), 143.1298 mph NoFlyZoneMidwest 2017 1/2 mile into 20 mph headwind. RACECAR NOW RETIRED. All of these are final PBs.

    VCM OTR CAI, HSRK, Heater Hose Relocate, custom street/dyno tune by oldskoolgp, Comp Cams 224/228 .581"/.588" 112 LSA cam, LS7 lifters, PAC 1219x springs, Monster LT1S (C7 Corvette) Clutch kit, Katech C6 Hvy Dty Master & Slave Cylinders, Camaro 1LE Diff with 3.91 gears, Kooks LTHs, Solo Hi-Flo Cats & Connector Pipes, Solo Mach Balanced Catback, BMR Toe Rods, Trailing Arms, Cradle & Diff Poly Bushings, 2017 Chevy SS front & rear Brembo calipers and rotors.

  11. #8
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    I'm running the monster stage 3 and it's doing well so far for power runs. Kinda annoying on the street as it shudders pretty badly though. I have a katech sitting on the shelf and plan on buying their slave cylinder when funds are available. Their slave is cheaper than a whole new clutch

    If that doesn't work out, I'm keeping my eyes on a McLeod twin disk setup.

    But all of that is after I have some v-bands put in the exhaust. I'm tired of spending 20 min swearing at the slip connection to my x-pipe
    2008 GT - 2300 Maggie, Comp cam, ARH LTs, staggered Breyton GTS, 6spd Manual conversion DONE!!.
    From previous owner: 552 RWHP, 589 RWTQ; Tuned by Patrick G via EFI live Autocal

  12. #9
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    Quote Originally Posted by bracketracer View Post
    I can possibly answer that question. I ran a Katech LS9R clutch set-up in my GXP that only survived 75 1/4 passes in 1 year and had to be replaced. Admittedly I launch a 4200 lb race weight car on drag radials at 4,000-5,000 rpm a few times a year, but I expected more out of a clutch rated to support over 900 lb/ft of torque, when I'm only putting 416 lb/ft of torque to the ground myself. I am now running a Monster LT1S clutch/flywheel with a Heavy Duty Corvette Master Cylinder & Slave Cylinder. The clutch pedal is much heavier, but it has held up great road racing at Road America and drag racing with launches of up to about 4250 so far. If it is still performing this well a year from now I'll be thrilled!
    That is odd. I didn't do the "R" kit. I did their basic LS9X kit.

    They don't even list the "R" kit anymore...hmm
    2017 Chevy SS / OrangeBlast / A6/ Spare/ Roof - hers
    2016 Chevy SS / Jungle / M6 / Spare / Roof
    2013 Chevy Avalanche / Z71 / FGM / Roof
    2009 Pontiac G8 GXP / SBM / M6 / No Roof
    1988 Volvo 740 Turbo Wagon (modified)
    2009 Saab 9-3 Combi / 2.0T

  13. #10
    Addicted Member bracketracer's Avatar
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    I bet that the Katech kits hold up well for street driving with some occasional "enthusiastic driving." I just don't see them holding up to regular or frequent racing. When I called them to complain about my situation, they basically told me that I got more out of it than they would have expected. This isn't to bash Katech. I highly recommend them as a replacement clutch for a stock or mildly modded car that will only occasionally see track use (or with easier launches on street tires). If you are going to race your M6 G8 GXP, you will need to pay up for something much heavier duty, and you will sacrifice a certain amount of drivability in exchange for the durability.
    Joe Morgan, G8 GXP Registry Organizer, G.O.N.E. Organizer
    2009.5 G8 GXP WH 6M onyx/red no roof 12.921 @ 108.89 BONE STOCK! (then), (now) 12.344 @ 110.92 with 1.688 60' at 766' DA, PB with new cam & tune 12.191 @ 112.35, 2:59 Second Lap Time Road America (Goodyear RS-As & Hawk HP Plus pads with stock rotors), 143.1298 mph NoFlyZoneMidwest 2017 1/2 mile into 20 mph headwind. RACECAR NOW RETIRED. All of these are final PBs.

    VCM OTR CAI, HSRK, Heater Hose Relocate, custom street/dyno tune by oldskoolgp, Comp Cams 224/228 .581"/.588" 112 LSA cam, LS7 lifters, PAC 1219x springs, Monster LT1S (C7 Corvette) Clutch kit, Katech C6 Hvy Dty Master & Slave Cylinders, Camaro 1LE Diff with 3.91 gears, Kooks LTHs, Solo Hi-Flo Cats & Connector Pipes, Solo Mach Balanced Catback, BMR Toe Rods, Trailing Arms, Cradle & Diff Poly Bushings, 2017 Chevy SS front & rear Brembo calipers and rotors.

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