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Last year I finished my Granada disk brake conversion. At that time i scoured the archives looking for master cylinder recommendations. I finally settled on a MC from an early 70's F250. It turned out that the push rod for this MC is apparently too short as the pedal does not return to its fully upright position after it is pressed. It is bad enough that the brake lights will often stay on unless I lift up on the pedal after braking. I either need to find an adjustable pushrod or a more appropriate MC. I am leaning toward the pushrod because I dont want to have to worry about a new one having different sized fittings. Trouble is I don't know where to find an adjustable rod. Also after I do find one is it possible to remove the existing pushrod from the MC. There is a locking clip holding it in place.

Thanks
 

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You can get the adjustable push rod from most brake kit manufactures like SSBC and Master power. I think it is also in the NPD and/or Paddock catalog. I had that same delema with the push rod clip that would lock it into the MC if it was not right. I opted to assy my Master cyl with out that clip when I first did the conversion. That way I was able to make sure I had the right rod and set-up before locking it in. If the rod is the correct length and it is on the pedal correctly it won't pop out of the MC. Though the clip is a nice added saftey. As for getting it out of the MC once you put it in, I have a bad feeling you have to tear it down like you were going to rebuild it to get to that clip. On the first MC that was in my car, I put it in the bench vise and took a 1lb sledge to it and smashed it to bits to get that rod out, since I was throwing away the MC anyway. As for the correct unit to use, I used a Raybestos unit that was recogmended by Mustang Ranch in CA. You can also contact Trans Am racing for a recogmendation for the unit to use. He has a 15/16, 1", and 1 1/2" bore units for use with the Granada and/or Lincoln Versailles conversion.

Kory

Mustang Parts makes a great addiction.
 

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Having a too short brake rod is common in Granada brake conversions. I fabricated an adjustable rod from the original. From a hardware store you can get a coupling nut; looks like any other nut but is about 6 times as thick. Cut the old rod about 1 inch down from the loop end and thread 1/4-20 with a thread die. (or what ever the couple nut is). Thread the other half of your rod for a similar amount. (note that the sum amount of the two threaded sections should be equal to the thickness of the coupling nut) Thread the loop end into the coupling nut not quite 1/2 through. Thread the other end in to the coupler nut until it contacts the loop end. back off about 6 threads. Install the M/C rod. Adjust the hieght of the pedal by rotating the push end of the rod by hand. You can make this length permanet by either using locktite on the threads, using lock nuts or drilling throught the coupling nut and M/C rod and inserting roll pins. Without a proper length rod you probably were not getting full braking power.

Tom Kubler, Long-time Mustang Enthusiast & San Antonio Mustang Club Founder
 
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