AtlantaRTA

I have completed my installation and made detailed drawings and measurements of a McLeod Master and Slave. I am scanning my slave drawings to post them. I will update soon once the clutch is broken in and I can try some high RPM shifting. My impression over 400 miles of driving is that the all McLeod hydraulics are very smooth.

The basics are as follows:
McLeod Slave #1373 with McLeod Piston #139033-1 (#3 piston).
Spec 3 Pressure Plate Fingers to Bellhousing Face= 2.230"
Slave Bearing Face to Transmission Face with 0.050" shim= 2.095"
Setup Distance= 0.135"

Note: My flywheel is a Z06 that was resurfaced minimally twice and 'zero balanced'. A new flywheel may require a different shim. You should measure your specific distances. I wanted to achieve a 0.125" setup distance minimum. This is for clearance as your clutch wears.

Dustin Butts

iTrader: (5)

Awesome bro...post em up as soon as you can.

AtlantaRTA

I finally have the Spec 3 broken in. I was able to make some high RPM shifts and really get the feel of the new setup. It was great in every respect. The engagement is very smooth and accurate. It worked very well when put to the test banging gears. No problems with high RPM shifts. I'm making powerpoint drawings of the setup and slave dimensions that I'll post as jpegs.

1CAMWNDR

iTrader: (21)

TTT. Very interested in this McLeod slave cylinder if I ever have to change my new "288".

AtlantaRTA

I like it a lot so far. I just put it to the test in traffic for 6 hours over three days. It worked great with my spec 3. They can be purchased for about $375.00 at Thunder Racing. I noticed on the Mcleod site that the other bearings and masters are sold as a kit around $500.00. That makes it cheaper than buying them seperately. I'm not sure what the price would be on the 1373 slave and the master. They also mention not to use the slave with the stock pressure plate. This bearing has no preload spring. The link at the bottom of the page brings you to the McLeod site. Go to Hydraulic Throwout Bearings Bolt On. It looks like the second generation bolt on bearing. The 1373 has a quick coupler for the hydraulic line and a regular bleeder.
http://www.mcleodind.com/cgi-bin/fcc...ostname=MCLEOD

Dustin Butts

iTrader: (5)

AtlantaRTA,
What's the latest on the new clutch and the drawings?

Squintz Palladoris

iTrader: (1)

Ttt

Squintz Palladoris

iTrader: (1)

TTT

silverZ98

iTrader: (6)

ttt top very intrested in this, this may change my mind swaping ot a auto

AtlantaRTA

I have the installation information in a jpg format now. I used my notes and made Powerpoint slides. I also have pictures of the slaves side by side and the McLeod disassembled. I will scan and post them also. I have been very happy with my setup. The Spec 3 and the all McLeod Hydraulics work great. I have several thousand miles and four months on them.

Dustin Butts

iTrader: (5)

Awesome!...great work brother...thanks a lot for sharing your R&D with us.

AtlantaRTA

Thanks I hope it helps someone out. If anyone sees a mistake I can edit it. If anyone has a question, I'll try to check back as much as possible and answer. Pictures soon!!

George Holmes (AtlantaRTA)

AtlantaRTA

Here are the pictures!!!
1st: McLeod Slave disassembled, 'O' Ring is on inside of top half that has lines. Both Pistons are shown, the shorter one is stock the longer one is the #139033-1 (#3 piston).
2nd: McLeod Slave Top View GM Quick Coupler on bottom, Standard Bleeder just hangs out of Bellhousing for wrench.
3rd: GM '288' (extended) on Left, McLeod Slave Completely Compressed on right.

Squintz Palladoris

iTrader: (1)

Dude! Thanks for the PICS!

Question, it looks like the Mcleod slave has an AN fitting Where the GM line goes into it. What Size is it? 3 or 4 AN?

Thanks!

Brad

AtlantaRTA

I think it is a 4AN but check with McLeod to be sure.

P Mack

iTrader: (6)

Why is it you can't use the mcleod slave with a stock pressure plate?

Orange Peel

iTrader: (20)

Nice pics, they sure do make some nice stuff, now how long before that starts to leak on you is the next question? Looks like it's easy to bleed at least

AtlantaRTA

On the Pressure plate question, the only reason is that I am told by Red at McLeod that the stock pressure plate needs the preload spring to self adjust.
On the slave leaking, I'm not sure who makes the McLeod slave. It has a very good design with it's 'O' Ring built into the top half, (the one that's on the right of the disassembled picture up side down). If you have taken apart the GM slave cylinder you know how their floating 'O' Ring looks. It leaks quite often and sucks in air all the time. The question people might ask is when will their stock GM slave cylinder leak or suck in air. I have been through the McLeod Master and have rebuilt them, so I understand where your concern is coming from. I have checked and my fluid is clean, (no black telltale signs of trouble). Only time will tell about reliability. Do use regular DOT 3 and not synthetic. There are warnings all over about potential trouble.

Orange Peel

iTrader: (20)

Glad to hear it's working out, I'm no McLeod hater by any means, I have owned there single disk setup and now their Street Twin, along with their master (which leaks), and I just replaced my slave with the updated GM one, and it's working great so far. I'm just concerned with time for this McLeod slave, it looks beefy, WELL built, but just not sure on their track record for this custom stuff. I've talked to Red many times, and it just sucks that their Masters have had so many issues when it's a kick *** peice!

Keep us up to date on how it works after so many miles, track runs, etc, that's where I want to know how it works, under HIGH RPM shifting, like 7k rpm, etc.

Thanks for the info and pics again!!

AtlantaRTA

I have had experience with the McLeod Master. My first one was cutting the cup seal on the reservoir ports. I exchanged it and the new one has been in for about five months. I had problems with my GM slave when I used the Ram Powergrip. It was new and would bleed fine and then suck in air several weeks later. I checked with others and found this has happened many times with New GM slaves. That's what led me to try the McLeod slave actually. I'm can't say exactly why the brand new GM slaves fail. Is it mainly on stronger aftermarket pressure plates? When I pulled the Ram and new GM slave out I said I'm not trusting the GM slave this time. Even understanding that theses aftermarket hydraulics do have quality issues. I had spent so much time on the GM slave I was prepared to take the time. I plan to completely rebuild the unit on every clutch change. With me most aftermarket clutches have lasteed about 30-40K miles. That's how long I hope the seals hold for. If it fails I will update the post and give the details.