I recently went to the dealer to get the gas overfill thing fixed, and the mechanic guy told me the master cylinder is leaking into the booster. I have noticed quite some time ago the pedal felt a little "softer" and it makes a "whooshing" every time I press it. Anyway long story short they were quoting me like 400 dollars and some change. I figured I could do it myself ( I've dome other stuff ) but not sure which kind to get.
Should I get a remanufactured one, or a new one?
Plus these things seem so hard to find.
Anyone have any recommendations?
Thanks.

I tried searching on here but no mater what I typed, a blank white screen is all I got.

 

There's a little known secret that TF has an oversized master cylinder but there's a Mopar piece that is fairly equivalent. Last time I checked the price was $89.....obviously you'll need to budget a few bucks for fluid but it's still cheaper than the $400 the dealer quoted. I'll look for the pn but it's from the euro models and is a direct bolt-in.

Sent from my DROID4 using Tapatalk

 

I believe its the one off a 2010-2011 Dodge Nitro. O possibly the one off the jk8s

 

Yep, jk8 I think. I'm still looking for the number, I wrote it down somewhere.

Sent from my DROID4 using Tapatalk



http://www.brakepadwholesale.com/ite...ESTOS&weight=5

 

If you go with a bigger master cylinder diameter without also installing bigger calipers, it will take more pressure on the pedal to get the same amount of braking.

 

I was under the impression from TF that the larger master cylinder bore simply moves more fluid with the same pedal travel.

Input 1 psi, output of 2psi vs the stock input of 1psi, output of 1psi (fictional numbers for demonstrative purposes only).

Sent from my DROID4 using Tapatalk

 

My own JK 'Big Brake' research: - Page 3

 

It can move more fluid, but with the larger master piston diameter, fluid pressure goes down, assuming the same amount of foot pressure on the pedal. And it won't really move more fluid if used with the OEM calipers.

It would take a smaller master piston diameter to make more pressure in the lines with the same amount of foot pressure on the pedal.

 

Ya, I too was under the assumption the TF had a bigger bore diameter. I have found one for around 70-80 dollars, its a DORMAN. I cant find any available to pick up.

 

According to TF website. A 2010 Wrangler has a larger bore than any other years.