The Postman

iTrader: (44)

Like the title says, installed a LS9r clutch setup in a 2007 Corvette. This was installed behind a 418 stroker motor, with only 300 miles on the car, mainly tuning miles, the slave failed. Melted the inner sleeve and locked up the slave.

Pulled it all apart, found out this has been a issue for a lot of ZR1/LS9 clutch guys and that there was a bad batch of bearings that apparently fail, causing the bushing to melt. So instead of having to do this again, we ordered a katech slave setup, basically a threaded sleeve that uses a Tilton slave and is a direct bolt in replacement.

Problem I have, is that even with the slave adjusted all the way down on the sleeve, I have zero air gap, I actually have about .060 of interference at this point.

Does anyone have any experience with this setup? Short of pulling the whole clutch back out and re checking its dimensions, I'm at a loss, looking for any input.

Thanks in advance

The Postman

iTrader: (44)

Some measurements to consider..

Bell housing to pressure plate fingers...2.245

Torque tube to slave bearing face...2.325

So actually .080" interference.

However the collapsed heights of both slaves only differ by .020"

jdoyle

iTrader: (27)

have you called katech?

Katech_Jason

iTrader: (19)

Check these measurements

Rear face of block to slave cylinder mounting pad (A)
Rear face of block to clutch fingers (B)
Slave cylinder compressed height not including flange on the back (C)

A-B-C=.100-.150"

The Postman

iTrader: (44)

Jason thanks for the reply..

Finally got around to dropping out the bell housing and grabbing some measurements.

Rear face of block to slave cylinder mounting pad - 6.6875
Rear face of block to clutch fingers - 4.1875
Slave cylinder compressed - 2.400
(slave is bottomed out on the threaded sleeve)

so with these measurements, I have 6.6875-4.1875-2.400=.100" of clearance.

Do these measurements check out or are there any that seem off from what they should be. I can't find anything anywhere that specifically says what the stack height should be.

onspeed

iTrader: (3)

In theory shouldn't you get the same result measuring from rear face of block as you would with the conventional TT>slave and PP>Bellhousing?

The Postman

iTrader: (44)

That's why I'm annoyed and frustrated with this setup right now. In my opinion measuring from the bell housing to the PP fingers and then torque tube to mounted slave bearing, should give you good numbers, so how using 3 different dimensions seems to net clearance all of a sudden...I just call bullshit.

Katech_Jason

iTrader: (19)

Your measurements are a little different than what we measured in the C6, but they still stack up to the correct clearance.

Here is what we measured:
block to slave pad 6.640
block to fingers 4.150
slave compressed 2.400

Gives us .100 clearance also