Ls1Mx-5

iTrader: (3)

If I drive my ls1/t56 normally, the clutch is fine and it shifts beautifully. If I get on it and make 3 to 4 consecutive high rpm shifts, the clutch goes to the floor and barely engages. I have to pull it over and pump the clutch for 5 minutes for it to return to normal. What could this be? Throwout bearing? My dad thinks pressure plate but I dont see how that's possible. Thanks in advance

99 WS-sick

iTrader: (2)

i had almost the exact same thing happen, when i would shift at high rpm's (4500+) the pedal would stick to the floor and i would have to pick it up and pump it before it would reengage. i finished changing the clutch about 1 hr ago and its a little better but not perfect. iv changed everything except the master cylinder and so im buying one from tick performance this friday. they say that will eliminate the problem.

this stock master cylinder doesn't flow quite enough fluid for hard shifts, its a crappy design just like the differentials

Ls1Mx-5

iTrader: (3)

So you changed the throwout bearing as well? I already have an aftermarket master cylinder as this setup is in a miata. Best of luck to you

99 WS-sick

iTrader: (2)

yea throwout bearing, pilot bearing, realease bearing, slave cylinder, stage 2 clutch with lightweight flywheel...everything

Ls1Mx-5

iTrader: (3)

Have you tried a pressure bleeder? I think that's what I'll try next

SNLPerformance

iTrader: (15)

How much power are you making, what kind of clutch and what is the condition of it?

SPEC-01

iTrader: (2)

Using a mighty-vac or other pressure bleeder would be a fine way to insure that all the air is out of the system. Give it a shot. You can also examine the fluid in the reservoir. If it is dark or discolored then you need to flush the fluid and refill with a higher BP fluid. Make sure that the line that leads from the master to the slave is routed properly (behind the heat shield) and I recommend wrapping the line with a good heat resistent wrap too.

Additionally, You may have a leak somewhere is the hydraulic system. Have you noticed any leaks under the car on on the firewall? If not there could be an internal leak bypassing the seals in either cylinder. Check the above and let me know what you find. We can proceed with tech support from there.

GOrilla

I would have to agree with trying to bleed it.

nasty96

if you have headers when you run it hard the headers get really hot and the line from the master to the slave runs right along the driver side header and boils the fluid putting air in the system... go to a dot 5 fluid that fixed mine...