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Spec SST Trim clutch grind issues

Current set up is a Vortec Supercharger 5.7L RT (Mopar 10 edition) with SRT Intake/rails, & 60 lb injectors with a Diablo tune at 570 RWHP. I toasted my clutch at 48K and ordered a Spec SS Trim (SD80SST) to replace stock OEM 2 stage clutch.

No issues with install but here's my problem...can drive first 5 minutes with no clutch grind and then I'm grinding gears (after car warms up). No fluid leaks from the slave cylinder. Bleed clutch with typical 200+ pumps on the clutch petal. 

I'm running into either:

(1) Tolerance issue (vs. OEM) with this clutch not engaging/dis-engaging

(2) Clutch cylinder "actuator" not functioning to push slave to full engagement  



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If you jack the car up with the back wheels off the ground and depress the clutch with the car in gear, what happens? Do the rear wheel spin with some force or do they stay pretty much stationary?

Sounds like the clutch is not releasing to me and this test should show that.  If that's the case, you may need to shim the TOB.  You'd need to take down the trans and take measurements.

When the clutch heats up it could be just enough that it's keeping pressure on the flywheel when disengaged.  Had a similar issue with a McLeod I put in my old car, and ended up being the wrong clutch at the end of the day and was built 1/2" too short.

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