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GT350 Rear Girodisc install

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2,203
1,067
Bay Area
It was finally cool enough to hang out in my garage this week so I installed the rear Girodisc rotors on the GT350 last night. Bear with me as I write this up and update it. The discs are one pound lighter than stock. They fit perfectly and look better than OEM. I know that these will last a lot longer than the OEM rotors. My Front Girodisc has been on my car for track use only and has 8 track days on them with plenty of life left in the rings. So I am hoping the rears will last even longer than the fronts which I am sure they will. Right now I am running G-loc R12/R10 on track and GS1 on the street. I was changing my front rotors to the OEM for street duty but now I will just keep using the Girodisc rotors.

I will test drive the car over the weekend and provide an update if needed.

The only tools I used are as follows
BEER of CHOICE
3/4 lug socket
15mm socket
1/2 drive breaker bar
1/2 drive ratchet
extension
Impact gun
Rubber mallet
Torque wrench
Craftsman 41397 tack puller
Brake caliper spreader
Anti seize and / or blue loctite
Hose removal pliers (these act as spreaders to remove the e-brake spring) https://www.amazon.com/dp/B07DMBZR59/?tag=tmo302-20 OR https://www.amazon.com/dp/B079P3LV8M/?tag=tmo302-20

Do the obvious: lift car, remove tire. Also ensure the e-brake is off. If not, I'm sure you'll have a hell of a time trying to get the rotor off.

Rotors are directional so beware of that.

1) You can pull up the e-brake spring by hand and get the hose removal pliers under the metal cylinder. Then as you spread the pliers they will lift the e-brake cable up. I took the tack puller and placed it under the bottom of the metal cylinder and used it to guide the e-brake cable out of the bracket. It can be done other ways but this method seems to work best for me so far. And if anyone has a n easier way please let me know.
2) Remove the two caliper bolts.
3) Remove caliper and support as needed.
4) You might need a rubber mallet to knock the rotor loose. You shouldn't have to bang on it too hard but some tapping in a circular motion will loosen it up if it is stuck.
5) Slide off rear rotor.
6) Install new Girodisc rotor.
7) Take brake caliper spreader and spread the rear pads.
7) Inspect and clean off old loctite on caliper bolts. This is where it is a personal preference. You can install anti-seize or loctite. I prefer to use anti-seize and torque to spec. Ford states 81 foot pounds. I do 70 foot pounds since I know this will be removed and it's going to help the threads last longer in the caliper.
8) Now for the fun part. That damn e-brake spring. Take a few swigs of your beer and cuss at the Ford Engineers that designed this. I took the tack puller and lifted it up as much as I could, then I used the hose removal pliers to lift it more and then get the tack puller completely under the metal cylinder and guided the cable through the slot. Once you get it high enough it will go into place pretty easily. Just make sure the spring stays on the bottom side of the bracket. It wants to come over the top.
9) Install tire and torque to your specs. Ford specs are 150 foot pounds +- 15. I torque mine to 130 foot pounds.

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302 Hi Pro

Boss 302 - Racing Legend to Modern Muscle Car
2,009
441
Southeast
Looking at pic #10 the new rotors look like they are directional. Are they? (Sorry if I missed that in your post.)
 
1,249
1,243
In the V6L
Unhooking the hand brake cable is a lot easier if you have the right tools. I've done it probably five or six times now, and here's my kit:

1594500436458.png

I use them from left to right.

The red handled pliers (TEKTON 34435) on the left allow you, from below, to grab the bottom of the spring just above the end and push it up to expose the end of the cable with the crimped-on eye fitting. While holding the spring out of the way, use the pry bar to push the top of the crimped fitting inward so it rotates toward horizontal. As it rotates it unhooks and pops off.

The cable end is locked into the bracket by a set of small spring tabs under the top of the bracket. To get the cable out of the bracket, the flat tool (Lisle 40750) in the middle is the key. From above, push the spring down, slide the tool over the inner wire and bring it up against the bottom of the bracket to release the tabs. Then just pull the cable up and slide it sideways out of the bracket.

Once the cable's out of the way, you have access to the caliper bolts.

Putting it back together isn't complicated but there can be challenges if the crimped fitting twists so it won't go back onto the lever. Once you've snapped the cable back into the bracket, push the spring up again as you did when you took it off, then use the angled tip pliers to manipulate the fitting eye back onto the lever. Once it's hooked on the outer part of the lever, use the pry bar to push up and in on the bottom of the eye. That rotates it and allows it to pop back onto the lever.

I included the vice grip style pliers in the picture - I've used them exactly once, when I was putting the hand brake back together and I needed an extra hand to keep the spring compressed while I worked the eye back onto the lever.
 
2,203
1,067
Bay Area
Unhooking the hand brake cable is a lot easier if you have the right tools. I've done it probably five or six times now, and here's my kit:

View attachment 18273

I use them from left to right.

The red handled pliers (TEKTON 34435) on the left allow you, from below, to grab the bottom of the spring just above the end and push it up to expose the end of the cable with the crimped-on eye fitting. While holding the spring out of the way, use the pry bar to push the top of the crimped fitting inward so it rotates toward horizontal. As it rotates it unhooks and pops off.

The cable end is locked into the bracket by a set of small spring tabs under the top of the bracket. To get the cable out of the bracket, the flat tool (Lisle 40750) in the middle is the key. From above, push the spring down, slide the tool over the inner wire and bring it up against the bottom of the bracket to release the tabs. Then just pull the cable up and slide it sideways out of the bracket.

Once the cable's out of the way, you have access to the caliper bolts.

Putting it back together isn't complicated but there can be challenges if the crimped fitting twists so it won't go back onto the lever. Once you've snapped the cable back into the bracket, push the spring up again as you did when you took it off, then use the angled tip pliers to manipulate the fitting eye back onto the lever. Once it's hooked on the outer part of the lever, use the pry bar to push up and in on the bottom of the eye. That rotates it and allows it to pop back onto the lever.

I included the vice grip style pliers in the picture - I've used them exactly once, when I was putting the hand brake back together and I needed an extra hand to keep the spring compressed while I worked the eye back onto the lever.
How long does that take you? I do mine in a minute or two. So I'm curious about your method.
 

yotah1

Ford Employee
386
598
Detroit
Do you have an idea regarding availability of these? I've got a trackday scheduled at Grattan on AUgust 8th/9th and intend to swap my front discs to Girodiscs as my OEMs are grooved to hell and I don't want to ruin brand new pads on them. I was thinking about doing the rears at the same time.
 
group buy or a tiny little discount for those who would purchase a front and rear set together would be a nice touch :)

look at mr moneybags.......

competition motorsports gives you 10% off if you are an scca member with free shipping and no tax........and they carry the girodiscs
 

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