Hey guys, I got a l33 motor (5.3l) with a t-56 from a cts-v that's been converted to run the f body tailshaft and housing all stuffed into a nissan silvia. My problem is that when I went to bleed the system, it leaked almost immediatly. Upon pulling the drivetrain and cracking the trans loose, I found the slave is leaking from the center of the slave. I'm thinking the seal is blown. Should I have installed a shim of sorts, or do I just have a faulty slave? Thanks in advance.

 

A shim won't help the leak. Sounds to me like you need a new slave.

 

What brand is your slave? I just got a Delco dud that leaked where the bleeder tube attaches to the slave body.

 

It's a gm slave with 0 miles on it. Still working out some bugs in the car right now, but is it possible that I've got too much clutch pedal travel?

 

The CTS-V bell housing sits back pretty far because the CTS-V came from the factory with a dual mass flywheel. If you aren't running a dual mass flywheel with an F-body slave, that is your problem. You need about a 1" spacer under the slave to run the short slave with a single mass flywheel. There are lots of threads on here about how to measure for proper clearance. I would highly suggest you measure everything following one of those threads.

What flywheel/clutch are you running and what slave are you using?

 

A 1" spacer? I'm not doubting it but man thats a huge shim. He mentioned in the above post that it was a stock GM slave.

Here is a post to the OP that should help you measure to see what size shim you should need. This is a great write-up and im not sure if it is stickied or not, but it should be.

https://ls1tech.com/forums/manual-tr...good-tech.html

 

It's an LS7 clutch, and to be honest, I'm not sure if it's an F body bellhousing or a cts-v bellhousing. As for the link for measuring for a spacer, I'll try that out toninght. Thanks guys.

 

Yeah the CTS-V slave and the F-body slave are very close to the same length. When I installed an LS7 clutch in my V I had to put a .970" spacer under the stock slave. Or you can just install an LS7 slave as it is also almost a full inch longer than both the CTS-V and F-body slave.

 

If by chance I do need a shim, where would one go to get one?

 

Speed Inc sells some but they are not very thick. I had mine custom made.

 

If the LS7 slave is almost a full inch longer, would it be possible for the OP to install a "normally stocked" shim (if needed) after measuring since he would need a new slave anyway?

 

Yeah you can shim any slave. Measuring is the first thing to take care of though. Also, its worth mentioning the LS7 slave has a different connection than an F-body. The V and the LS7 both use a black plastic QD and the F-body is the gold aluminum type.

Stock CTS-V fitting (same for LS7)


Stock CTS-V slave next to an F-body slave


LS7 slave length on top. Stock CTS-V on bottom. You can see the LS7 has about an extra inch of aluminum at the base. Also, not how much of the input shaft is visible between the two.

 

So I did some measuring and I'm about an inch out. Looks like I'm either going to need a 0.875" thick spacer or go with the cts-v slave. At this point, I think I'll just get a spacer made up.

 

You can probably get one made up pretty cheap. Especially if you know a machinist. GL with the build man.

 

CTS-V slave is about the same length the F-body slave is. You would need an LS7/C6 corvette type slave.