LS9r clutch in C6 with katech slave...issues
Thread Starter
Joined: Jan 2007
Posts: 406
Likes: 0
From: Houston, Texas
LS9r clutch in C6 with katech slave...issues 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
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
Thread Starter
Joined: Jan 2007
Posts: 406
Likes: 0
From: Houston, Texas
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"
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"
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"
Thread Starter
Joined: Jan 2007
Posts: 406
Likes: 0
From: Houston, Texas
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.
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.
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.
Thread Starter
Joined: Jan 2007
Posts: 406
Likes: 0
From: Houston, Texas
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.
Trending Topics
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.
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.
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
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo