After pulling the transmission 26 times on my '64 Galaxie because of faulty hydraulic throwout bearings, I decided to call it quits and go with a hydraulic slave cylinder pulling a conventional fork. I pulled the transmission 12 times in one day trying to get the fittings to stop leaking on one of the bearings I had installed. Four other times I was left stranded with no operating clutch.
I have tried hydraulic throwout bearings from Ram, Speedway Motors and Southwest Speed. They have all leaked, and the O-rings have failed in all of them. The installations have all been correct with the correct master cylinder, and a pedal stop to prevent over-stroking the bearing. These bearings are designed for circle track cars where the car is started in one gear and there is no shifting involved. I am convinced that they will not last on the street.
I did not try a Mcleod hydraulic throwout bearing because of the cost, and I would hope that they use a lip style seal or redundant O-rings. After buying three of the cheap bearings, I was at half the cost of the McLeod, so as the old saying goes, "you get what you pay for".
Here is one of the three bearings that failed miserably:
You can see the grooves where the O-rings install here:
Here are the blown O-rings. I believe that larger diameter O-rings would solve the problem:
Since I have a '64 galaxie with a 351 Cleveland, there are no headers made that will accomodate manual clutch linkage. I am using headers for a '70 Torino with an automatic transmission hence the need for a hydraulic clutch setup.
I already had the clutch master cylinder mounted and connected to the clutch pedal, so I will skip that part of the installation.
Here is the Speedway Motors "pull" type slave cylinder I will be using:
A bracket was made to bolt to the side of the Borg warner Super T-10 tranny:
A stock Ford fork was modified by "pie cutting" a piece out to bend back the outer most part of the fork for header clearance:
A piece of 1/8" strap was used to reinforce the modified area of the fork:
Here is the installed slave cylinder:
The adjustment is made at the fork with the pull rod:
The completed installation works great, and if there is ever a problem, the slave cylinder is easily serviced.