S550 Brake Booster & Cylinder

[robertgw32]

I am upgrading my 2016 GT's brake system and found the following booster parts on parts.ford.com. I saw a YouTube video from Vorshlag Tech that points out that the PP version of the cylinder and booster are larger, but by looking at the following list of parts I have to ask: is there really a need for different parts for automatic transmission PP versus the manual transmission PP? Does the manual transmission clutch pedal assembly somehow take up space in that area and, if so, couldn't''t they have just used that same part on the automatic car?

BRAKE BOOSTER PART NUMBERS

BRB139 (2005) Ecoboost less performance Pack
BRB140 (2005) auto tans with high performance LS package **** $205.54
BRB141 (2005) power brake booster
BRB142 (2005) manual Trans with High Performance LS Package. MSRP $207.27
BRB143 (2005) GT less performance pack
BRB144 (2005) Ecoboost with tranction pack

 

[mikeD4V]

The manual and automatic brake master cylinders are the same, the reservoir differs. The auto version's reservoir does not have a nipple for the clutch line; the manual one does. The S550 uses brake fluid for the brakes and the hydraulic assist clutch.

Many have replaced the master cylinder with the auto version to divorce the brake fluid from the clutch fluid.

 

[robertgw32]

The manual and automatic brake master cylinders are the same, the reservoir differs. The auto version's reservoir does not have a nipple for the clutch line; the manual one does. The S550 uses brake fluid for the brakes and the hydraulic assist clutch.

Many have replaced the master cylinder with the auto version to divorce the brake fluid from the clutch fluid.

Thanks for clearing that up.

Up upgrading form a 2016 base GT. There are a number of related parts such as the vacuum tube, sensor, non-return valve, bush, grommet, gasket, nuts, etc. The vacuum tube is over $100. Would I need to replace this for the booster change, or change any anything else?

 

[mikeD4V]

If your parts/system are in proper working order then you should just need the master cylinder. I've replaced the master only without issue, YMMV.

 

[PaddyPrix]

I had come to a similar conclusion in my build thread -- https://trackmustangsonline.com/threads/the-albuquerque-stripper.16040/page-12#post-256750 -- and measured it out. The only difference between the automatic MC and manual MC is the number of nipples is one higher in the manual because of it feeding the hydraulic clutch line. The Base GT and Shelby GT350 share the same part, and we know that Ford is cheap and wouldn't go out of their way to carry yet another SKU, so the fact that they did for the PP is a telling sign, and same for the brake booster, which also has a PP-only SKU. I was having plenty of brake problems until I switched them both out, and it acted as if it was a brand new car afterwards.


Hopefully you went with Z, Base GT non-PP is B.

 

[robertgw32]

If your parts/system are in proper working order then you should just need the master cylinder. I've replaced the master only without issue, YMMV.

Thanks, again!

 

[robertgw32]

I had come to a similar conclusion in my build thread -- https://trackmustangsonline.com/threads/the-albuquerque-stripper.16040/page-12#post-256750 -- and measured it out. The only difference between the automatic MC and manual MC is the number of nipples is one higher in the manual because of it feeding the hydraulic clutch line. The Base GT and Shelby GT350 share the same part, and we know that Ford is cheap and wouldn't go out of their way to carry yet another SKU, so the fact that they did for the PP is a telling sign, and same for the brake booster, which also has a PP-only SKU. I was having plenty of brake problems until I switched them both out, and it acted as if it was a brand new car afterwards.

View attachment 75581
Hopefully you went with Z, Base GT non-PP is B.

I just now saw your post. Thanks

I ordered using the Motorcraft part numbering system. The parts arrived marked with both those Motorcraft part number and a “Part Number”, the latter being of a numbering scheme similar to what you noted.

I’m good on the cylinder — got BRMC219/FR3Z-2140-B.

However, on the booster they sent me BRB140/FR3Z-2005-J.

FYI, I ordered from parts.ford.com, which uses Motorcraft part numbers, basing my search on a VIN I found for a 2017 GT AT with PP

I will have to recheck this…

Thanks, again