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Kirkham Motorsports

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  • 3 Post By MOTORHEAD
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  #1 (permalink)  
Old 11-05-2021, 11:08 AM
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Default throwout bearing/slave cylnder?

Hi, I am running a 302 and t5 trans. Would the best thing to use be a hydraulic slave/ throwout bearing? it would allow only two hydraulic lines to be installed.
thanks for your help.
Jim
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Old 11-05-2021, 11:47 AM
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The HTOB died twice in less than 500 miles.

I switched to the traditional master/slave setup and never had another problem.
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Old 11-06-2021, 06:22 AM
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Using McLeod bolt-on (1300 series) HTOB now.
3 years and 4000 miles running with no problem at all.
Mounted to a McLeod clutch, big input Toploader (1-3/8") and BBF.

https://www.mcleodracing.com/1300-series-bearing-/p104

Note:
Old 1st generation units were problematic.
The current redesigned model appears to be reliable.

McLeod provides a few spacers to properly shim the HTOB.
I took a measurement and had a single shim machined
as opposed to a stack of smaller ones to get the proper spacing.

1400 series is the slip-on variant.

McLeod has HTOB rebuild kits available.
Replacement components at Summit Racing:
https://www.summitracing.com/search/...ent-components

How to rebuild video here:
https://www.youtube.com/watch?v=K39CNwrTv2o

Last edited by Unique427; 11-06-2021 at 09:12 PM..
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Old 11-06-2021, 08:53 AM
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Repairing/replacing the HTOB is not a problem, its the removing/reinstalling of the tranny/engine to get to it !
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Old 11-06-2021, 08:09 PM
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Put me in the camp with those who pulled the transmission multiple times to deal with a leaky EARLY HTOB. I switched to a mechanical TOB and clutch fork moved by an externally mounted hydraulic slave cylinder. It worked with no further problems. 351 Windsor with Richmond transmission.
eschaider and hauss like this.
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Old 11-07-2021, 02:53 AM
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Get the mike Forte kit and do it only once
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Old 11-07-2021, 08:27 AM
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Quote:
Originally Posted by 96witton View Post
Hi, I am running a 302 and t5 trans. Would the best thing to use be a hydraulic slave/ throwout bearing? it would allow only two hydraulic lines to be installed.
thanks for your help.
Jim
My 30 year old McLeod HTOB still works fine, and no leaks. I do note, however, the new ones seem to be made differently - I think mine's all steel.
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Old 11-16-2021, 03:07 PM
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thanks for the help. looks like it's a mixed bag and will have to make the choice myself and pray a lot.
jim
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Old 11-16-2021, 08:21 PM
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Not if you count the likes. I will say the internal ones seem to have a easier petal. Not hard to set up but easy to mess up the set up. Way more work to fix. Higher failure rate due to location. For those reasons alone I would recommend a external set up. I have installed both on different cars so trust me when I say I know what I am talking about.
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Old 11-17-2021, 11:00 AM
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Newer production cars with manual transmissions use HTOBs with little problem. Many aftermarket HTOBs simply use an o'ring as the seal and durability is poor. I know that the Tilton HTOB uses an actual seal designed for the purpose and the durability should be significantly better.
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Old 11-17-2021, 02:19 PM
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Quote:
Originally Posted by 6TNCRZY View Post
Newer production cars with manual transmissions use HTOBs with little problem. Many aftermarket HTOBs simply use an o'ring as the seal and durability is poor. I know that the Tilton HTOB uses an actual seal designed for the purpose and the durability should be significantly better.
Most newer production cars use automatics ,also I was talking about tremec transmissions with various clutches all cars were 450 and above hp.
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