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Unread 05-24-2013, 10:52 AM   #1
Cobra21
Registered User
1989 YJ Wrangler 
 
Join Date: Feb 2013
Location: Pompano Beach, FL
Posts: 46
Jeep YJ Brake Master Cylinder

Okay, I bought my first YJ a few months ago and its in pretty decent shape. I'm new to Jeeps so I'm slowly taking my time as I get familiar with it. I realized that my master cylinder is heavily corroded and leaking. The proportioning valve is also a little wet and damp. I plan on replacing the whole master cylinder but should I also replace the booster while I have everything taken out? My jeep is all stock and I haven't done anything the axle or brakes. I don't to any off roading (not many places to do that in South Florida) so I don't need to go all out. But I do want to be safe and able to stop. What is the best was to go? Should I do an upgrade? or just change out the master cylinder?

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Unread 05-24-2013, 11:37 AM   #2
JohndKc
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1987 YJ Wrangler 
 
Join Date: Sep 2009
Location: DeKalb, Illinois
Posts: 412
When i was in your situation i swapped out my MC and BB. I ended up with a dual diaphragm brake booster from a 95' wrangler. I have the BB turned upside down and run a Dodge Ram 2500 master cylinder. I run fluid straight to the front and proportion my rear. All you have to do is build a prop rod out of 1/4 20 threaded rod and seal the BB with RTV. Its a good setup and locks my 35s no problem.
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