Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

Clutch going spongy after starting.

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Old 03-15-2019, 10:46 AM
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Default Clutch going spongy after starting.

I just installed a monster stage 2 with a new GM slave in my 01 SS. I reused the stock master cylinder. I bled what I feel is all of the air out of the system. I gravity bled the master, forced fluid through with a syringe, and used a mityvac to pull some bubbles out. It was hard to get it in gear with the car off, and impossible with it running but after doing the aforementioned things it became easy with the car off. I started it and was able to go in all the gears easily, but then, with the pedal depressed, the gears became locked out again and now the upper half of pedal travel is spongy again. I have a remote bleeder btw. I checked under the car while I had someone pump the pedal and couldn't see any leaks, the vent in the bellhousing is dry. Do I need to continue bleeding or do I need a new master?

Last edited by chr45gt2; 03-15-2019 at 11:48 AM.
Old 03-15-2019, 11:45 AM
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Bled a little more and same thing. I can get it into a couple gears while on, then i get locked out of gear and soft, spongy pedal returns. With the car off the pedal goes back to being stiff.

Last edited by chr45gt2; 03-15-2019 at 02:17 PM.
Old 03-15-2019, 05:40 PM
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Bled, bled, and bled some more. Got quite a bit of bubbles out with the mityvac, pedal real nice while the car's off. Start it up, can get into a couple gears just fine, pedal goes spongy, no more gears . Ordered a Tick adjustable master, hopefully that fixes it so I can drive this bitch.
Old 03-17-2019, 12:48 PM
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Similar thing happened to me and the tick master fixed it.
Old 03-17-2019, 02:16 PM
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What kind of power are you guys putting down? I was planning on using this clutch as well and don't have the budget for a master cylinder in addition at the moment.
Old 03-17-2019, 10:04 PM
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Stock power here. I'm guessing there are plenty of guys running the stock MC with aftermarket clutch. I don't think it's the clutch that causes the problem.
Old 04-14-2019, 05:17 PM
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Update: Tick master cylinder fixed it.




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