MJ Comanche Tech. Stock & Modified. MJ (86-92)
All discussion regarding the Jeep Comanche, the pickup truck related to the Cherokee platform.

Brake booster upgrade

Thread Tools
 
Search this Thread
 
Old 07-08-2018, 11:50 AM
  #1  
Newbie
Thread Starter
 
k-ro958's Avatar
 
Join Date: Dec 2017
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee(SJ)
Default Brake booster upgrade

Can anyone tell me if I can put a 95 cherokee booster on my 87 Comanche 4.0 and if so is it a deriect fit or do I have to modify anything thanks
Old 07-09-2018, 05:54 AM
  #2  
CF Veteran
 
caged's Avatar
 
Join Date: Nov 2008
Location: Northern Ontario, Canada
Posts: 7,874
Received 94 Likes on 85 Posts
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
Default

not familiar with the 95 model booster, but i'm assuming it's a dual diaphragm style. i have done this in my 90 with a 97 booster.
all i had to do was ream out the brake pedal rod hole and grind the end flat so my brake switch would fit.
the 97 was a little longer in length, but nothing i couldn't get used to.
difference in braking is night and day.


so, i'm assuming you will have to do the same (reaming/grinding) as i had to do. you will like the new braking power.
Old 07-10-2018, 05:08 AM
  #3  
CF Veteran
 
freegdr's Avatar
 
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 22 Likes on 22 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Default

Think its not a double if thats what your seeking. Rod has to be modified for brake light switch.
Old 07-10-2018, 07:05 AM
  #4  
CF Veteran
 
Desertfox1023's Avatar
 
Join Date: Apr 2008
Location: Burlington, NC
Posts: 2,340
Likes: 0
Received 8 Likes on 8 Posts
Year: 1994...mostly...
Model: Cherokee (XJ)
Engine: 4.0L I6 HO, Lot's of Bolt Ons
Default

Originally Posted by k-ro958
Can anyone tell me if I can put a 95 cherokee booster on my 87 Comanche 4.0 and if so is it a deriect fit or do I have to modify anything thanks
Yes, 95 & 96 are both Double Diaphragm Boosters.

They use a different connecting rod that hooks to the brake pedal but it's easy to adapt.

I have a 96 Brake Booster and Master Cylinder combo that I swapped in my 94.




To clarify as others posted above the 97+ is also different that the 95&96 and will cause your break pedal to be a little higher than factory for your MJ.
I hear this isn't a problem although the 95&96 will keep it in the same location for your year.

Last edited by Desertfox1023; 07-10-2018 at 07:07 AM.
Old 07-10-2018, 04:08 PM
  #5  
CF Veteran
 
PNWjeeper's Avatar
 
Join Date: Feb 2012
Location: Southern Oregon
Posts: 1,206
Likes: 0
Received 1 Like on 1 Post
Year: 1990
Model: Cherokee
Engine: 4.0
Default

Originally Posted by Desertfox1023
Yes, 95 & 96 are both Double Diaphragm Boosters.

They use a different connecting rod that hooks to the brake pedal but it's easy to adapt.

I have a 96 Brake Booster and Master Cylinder combo that I swapped in my 94.




To clarify as others posted above the 97+ is also different that the 95&96 and will cause your break pedal to be a little higher than factory for your MJ.
I hear this isn't a problem although the 95&96 will keep it in the same location for your year.
I did a 95 in my 90 and noticed no difference in peddle height but significant difference in braking power.

It's important to grind the end flat otherwise your lights will ALWAYS be on. But you'll figure that out pretty quick. And I don't know if it was necessary but I kept the plastic sleeve that goes between the push rod and the connecting rod. Also the MC uses a different flare nut on one of the tubes plus on my 90 the connect on the engine side of the MC and the 95 is on the opposite side.
Old 07-26-2018, 03:18 PM
  #6  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes on 1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

This^^^.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
okcjeeper
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
19
04-19-2019 08:03 AM
bsljacques
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
17
08-20-2015 07:58 PM
OleBlue
Classifieds
9
07-04-2013 10:06 AM
JEEPIN'around91
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
01-25-2010 06:45 PM
xj92
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
09-09-2009 08:21 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Brake booster upgrade



All times are GMT -5. The time now is 12:04 AM.