Which Brake Booster and Master Cylinder
Thread Starter
Junior Member
Joined: Feb 2011
Posts: 83
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From: NORTH MISSISSIPPI
Year: 1990
Model: Cherokee
Engine: 4.0
So the brakes on my 90' XJ are horrible. I've been reading on here that I can put a master cylinder and booster off a 95-96 xj and it will almost double my braking power. Well yesterday I went down to my friendly Car Quest and ordered both for a 96 Cherokee. After a 10 minute argument about how a cherokee and Grand Cherokee are not the same thing he finally ordered them. Well they came in today and he's telling me the booster is for a 95 and down xj, but it will work just fine. If he's right then thats what I have now and wouldn't do me much good. I made him order me another booster for a 96. I guess my question is, is he mistaken on what years fit what and is a 95 model booster the one I want or should I wait and put the 96 model on?
Thread Starter
Junior Member
Joined: Feb 2011
Posts: 83
Likes: 0
From: NORTH MISSISSIPPI
Year: 1990
Model: Cherokee
Engine: 4.0
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
he needs to get his **** straight.
Booster 91-94 is the same, booster 95-01? is the same.
It needs to be the one with the plastic screw cover, not the metal cover with the strap thingy. It is MUCH bigger than yours so it should be obvious
This is my 1995 XJ brake booster. The one you are getting should look like this:
Booster 91-94 is the same, booster 95-01? is the same.
It needs to be the one with the plastic screw cover, not the metal cover with the strap thingy. It is MUCH bigger than yours so it should be obvious
This is my 1995 XJ brake booster. The one you are getting should look like this:
CF Veteran
Joined: Nov 2008
Posts: 7,874
Likes: 100
From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
i got my master/booster/proportioning valve unit all as one piece from a 99 xj at the wreckers for a mere 30 bux (or less) as i got a few other parts and grouped them all together.
i did the install/mod to the brake rod myself and was done from start to finish in about an hour, including bench bleeding/wheel bleeding.
like night and day.
and yes, don't let him order the wrong one. you tell him what you want.
i did the install/mod to the brake rod myself and was done from start to finish in about an hour, including bench bleeding/wheel bleeding.
like night and day.
and yes, don't let him order the wrong one. you tell him what you want.
Senior Member
Joined: Dec 2009
Posts: 682
Likes: 0
From: Elk River, Minnesota
Year: 1989
Model: Cherokee
Engine: 4.0
he needs to get his **** straight.
Booster 91-94 is the same, booster 95-01? is the same.
It needs to be the one with the plastic screw cover, not the metal cover with the strap thingy. It is MUCH bigger than yours so it should be obvious
This is my 1995 XJ brake booster. The one you are getting should look like this:

Booster 91-94 is the same, booster 95-01? is the same.
It needs to be the one with the plastic screw cover, not the metal cover with the strap thingy. It is MUCH bigger than yours so it should be obvious
This is my 1995 XJ brake booster. The one you are getting should look like this:

CF Veteran
Joined: Jan 2010
Posts: 2,059
Likes: 1
From: Indianola IOWA
Year: 1992
Model: Cherokee
Engine: 4.0
im pretty sure 96 was the dual diaphram but had the rod that doesnt need modded.
just go astro van booster. get some real power
single diaphram booster- 500 psi at caliper
double 800 psi
astro van 2000 psi
just go astro van booster. get some real power
single diaphram booster- 500 psi at caliper
double 800 psi
astro van 2000 psi
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CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
its the booster in the middle and it makes all the difference i the world,like going from the old manual 4 whell drum brakes to modern 4wheel disc i also did the 30 dollar junkyard swap, took me longey to find a sharp drill bit in my tools than to do the swap. I run 38s and have no more of that holy **** brakes stop b4 i hit the car in front of me feeling best upgrade that you can do for the older xjs. igot the line fittings from the donor vechicle made it a lot easier with the swap
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Sep 2010
Posts: 2,844
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From: Warsaw, IN
Year: 2000,1990,1999
Model: Cherokee
Engine: 4.0
its the booster in the middle and it makes all the difference i the world,like going from the old manual 4 whell drum brakes to modern 4wheel disc i also did the 30 dollar junkyard swap, took me longey to find a sharp drill bit in my tools than to do the swap. I run 38s and have no more of that holy **** brakes stop b4 i hit the car in front of me feeling best upgrade that you can do for the older xjs. igot the line fittings from the donor vechicle made it a lot easier with the swap
That's funny because I have a 2000 and I can't even stop my jeep with two atvs out back. I know the booster is good too.
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
Thus he is not selling him the correct part for the application, and he needs to get his **** straight
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Sep 2010
Posts: 2,844
Likes: 0
From: Warsaw, IN
Year: 2000,1990,1999
Model: Cherokee
Engine: 4.0


