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

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Old 04-20-2009, 09:45 AM
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Default First time mityvac user here. Hate to start new thread.

Ok guys my clutch hydraulics have plagued me ever since my engine was put into my car. It wont go into first easily at all and grinds like nobody's business. I just bought and installed the Tick adjustable MC and still grinding. I was told I still needed to bleed the system. Well I went and rented the mityvac read the instructions as I've never used anything like it before. I put it into place and started squeezing. Never saw any bubbles but as I was squeezing the plastic line leading from the vac to the clutch reservoir collapsed. I wasn't even at 15" of vacuum yet.

This **** is getting on my damn nerves, so some help on how to use this damn thing would be great.
Old 04-20-2009, 11:22 AM
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Here's a link that might be helpful.

http://home.comcast.net/~buschman_00...utchbleed.html


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Old 04-20-2009, 12:53 PM
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All my stuff is installed, thats showing how to bench bleed everything. I would've never thought a t56 was this much of a PITA.
Old 04-20-2009, 01:47 PM
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Yep, the hydraulics can be fussy on these cars.

How is your transmission, clutch and slave cylinder ?


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Old 04-20-2009, 01:56 PM
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Slave cyl new, MC new, clutch is new trans is rebuilt.
Old 04-20-2009, 02:27 PM
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How does the engagement feel at the peddle ?



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Old 04-20-2009, 03:11 PM
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At the top of the pedal I still have some play. The pedal feels stiff like its supposed to it just wont go into first smoothly.
Old 04-20-2009, 03:40 PM
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Only first gear is hard to shift ?
Old 04-20-2009, 03:48 PM
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1st and sometime 3rd if i'm in the throttle. Its gotta be air in the slave causint this. I'll try the mityvac again tonight but I'll push the clutch pedal in a few times this time. While its pulling some vacuum.
Old 04-20-2009, 04:04 PM
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I have a Tick m/c as well. Those take so much fluid that you can gravity bleed them. I also have a Mity-vac and never had much luck with it.

Everytime I've installed a new master cylinder, I've bench bled without the Mity-vac. Once I have it bench bled, I just hook it up to the slave pump the peddle a few times and that's it.

After much headache and pulling the tranny out about six times, I found something that works for me.

The best formula seems to be, bench bleed the m/c regardless of what type it is or get a pre-bled GM unit.

Also, why not try lengthing the the m/c rod just a little bit.

Sometimes dirty boiled over fluid reaks havok too.


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Old 04-20-2009, 04:07 PM
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Well the fluid thats in it is maybe 5-600miles used. The pedal is about even with the break pedal and it didn't make any difference from where it was to where its at now, which was about an inch.
Old 04-20-2009, 04:12 PM
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What clutch are you running ?

If you've done everything you can do, maybe it's time to contact the company that rebuilt your transmission ?


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Old 04-20-2009, 04:44 PM
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I've never bled it right. I always pumped and opened bleeder valve. Now I read about this mity vac and the correct way to bleed the sytem, so I will try both. I have the LS7 clutch kit.
Old 04-20-2009, 06:35 PM
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I just put in a new LS7 clutch kit too. So far so good.

Some say open the bleeder valve and than push or some say push the peddle down and open bleeder. The both work as long as you don't let the peddle back up while the bleeder is open.

I hope you get that beast fixed.


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