lift kit, and brakes. - JeepForum.com

 
LinkBack Thread Tools
post #1 of 12 Old 02-18-2005, 04:32 PM Thread Starter
motorheadmach1
Registered User
1990 XJ Cherokee 
 
Join Date: Feb 2005
Location: UNION CITY, TN
Posts: 162
lift kit, and brakes.

i just bought an 89 comanche with a rough country lift i dont knwo the exact size i think its like 3 inches. the rear beakes have some sort of weight sensing proportioning valve and with the lift installation it came disconnectd from it mount. i was wondering how to bypass this or modify it to work with the lift.

thanks andrew

motorheadmach1 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 02-18-2005, 06:15 PM
rustybottoms
Registered User
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 100
Dude, I think I've got the same thing! I was wondering what that little contraption was for. Sorry I can't help, but I look forward to seeing if anyone else can answer this question for us.

1988 Comanche Chief 4.0 4X4 stick
109k miles on it
It's a piece of junk, but I love it!...most of the time.
rustybottoms is offline  
post #3 of 12 Old 02-18-2005, 09:22 PM
trkibbler
Registered User
1988 MJ Comanche 
 
Join Date: Jan 2005
Location: Southeast Kansas
Posts: 13
Got a Rancho 3" lift on my 88 Comanche. Bought the truck in 93 and the Height sensing proportioning valve has been disconected the whole time. Don't know if the original owner did it or whoever istalled the lift but I never seemed to have any problems. I take the brakes apart about every 4 months and all that seems to happen is a little glazing on the pads. Most of that is caused by quick stops and the type of rims i'm running which reduce the amount of air to the brakes.
If you want i can get a picture of how it looks disconnected and send them.


Terry
trkibbler is offline  
post #4 of 12 Old 02-19-2005, 02:02 AM
rustybottoms
Registered User
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 100
That would be terrific Terry. I don't know about motorhead, but I would definitely like to see pics. thanks.

1988 Comanche Chief 4.0 4X4 stick
109k miles on it
It's a piece of junk, but I love it!...most of the time.
rustybottoms is offline  
post #5 of 12 Old 02-19-2005, 04:12 AM
1986Comanche
Registered User
1986 MJ Comanche 
 
Join Date: Oct 2004
Location: Stoneboro, PA
Posts: 626
My 1986 Comanche has a height sensing proportioning valve on the back too.

1986 Jeep Comanche 4x2, 2.5L I-4 TBI, 4 Speed

Blue Jeep Club Member #123

Easy to be a truck. Hard to be a Jeep.
1986Comanche is offline  
post #6 of 12 Old 02-19-2005, 04:33 AM
cj7xjmj
Registered User
 
cj7xjmj's Avatar
 
Join Date: Jul 2004
Location: God's Country VA
Posts: 1,566
All I did with m ine was to turn it up verticle, and zip tie it there. I have yet to have any ill side effects yet.



Patrick

90 Comanche thing. Exo-cage, tube bed, with a few other things done Here is a link to some pics of it
http://independent4x.com/generic67.html
http://community.webshots.com/user/cj7xjmj
If you have to ask why... Its a truggy thing and you wouldn't understand
cj7xjmj is offline  
post #7 of 12 Old 02-19-2005, 11:15 PM
rustybottoms
Registered User
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 100
Color me clueless, but wtf is a height sensing proportioning valve?

1988 Comanche Chief 4.0 4X4 stick
109k miles on it
It's a piece of junk, but I love it!...most of the time.
rustybottoms is offline  
post #8 of 12 Old 02-20-2005, 01:01 AM
1986Comanche
Registered User
1986 MJ Comanche 
 
Join Date: Oct 2004
Location: Stoneboro, PA
Posts: 626
The height sensing proportioning valve changes the braking power to the rear as the differential goes up with a load so that it has better braking power for the rear because of the load and so that the braking is better proportioned. Rather than having alot of weight in the back and still having the front brakes do all the work and the load pushing you.

1986 Jeep Comanche 4x2, 2.5L I-4 TBI, 4 Speed

Blue Jeep Club Member #123

Easy to be a truck. Hard to be a Jeep.
1986Comanche is offline  
post #9 of 12 Old 02-20-2005, 01:26 AM
1986Comanche
Registered User
1986 MJ Comanche 
 
Join Date: Oct 2004
Location: Stoneboro, PA
Posts: 626
That is my understanding of it, but my Factory Workshop Manual says: The height sensing proportioning valve provides optimum brake balance and efficiency. It senses light and heavy payload conditions and modifies front-to-rear proportioning to provide a balanced system at any load. The valve is connected through a mechanical linkage system to the rear axle and responds to vehicle heights as related to the vehicle load.

1986 Jeep Comanche 4x2, 2.5L I-4 TBI, 4 Speed

Blue Jeep Club Member #123

Easy to be a truck. Hard to be a Jeep.
1986Comanche is offline  
post #10 of 12 Old 02-20-2005, 11:47 PM
badron
Registered User
 
Join Date: Jan 2005
Posts: 456
I pull a big popup and would not be without it. If you run empty or light most of the time you will never mis it.
badron is offline  
post #11 of 12 Old 02-21-2005, 03:09 AM
cj7xjmj
Registered User
 
cj7xjmj's Avatar
 
Join Date: Jul 2004
Location: God's Country VA
Posts: 1,566
The thing is once you lift your MJ you change the angle of the proportioning valve unless you change the length of the rod that connects to the differential. Personally if you wanted to go through all that trouble you need to measure the angle of it stock, then modify the rod length to make it long enough.


Patrick

90 Comanche thing. Exo-cage, tube bed, with a few other things done Here is a link to some pics of it
http://independent4x.com/generic67.html
http://community.webshots.com/user/cj7xjmj
If you have to ask why... Its a truggy thing and you wouldn't understand
cj7xjmj is offline  
post #12 of 12 Old 02-22-2005, 08:11 PM
trkibbler
Registered User
1988 MJ Comanche 
 
Join Date: Jan 2005
Location: Southeast Kansas
Posts: 13
Sorry everyone. I know that i said I would post pics on how mine is set up, but it isn't gonna happen. After i finally found the digital cam i've spent the past few days trying to get it to work just to be informed by my five year old that she spilt some soda on it and washed it off in the kitchen sink. Kids gotta love em'

Anyway just to let you know it is turned up vertical not zip tied or anything like patrick said his was but it is pointing straight up.
trkibbler is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
88 Cherokee brakes, replaced almost everything, still weak brakes, ARGGH!!! raymoore XJ Cherokee Technical Forum 8 10-06-2011 11:56 AM
Lift Installed...Now No Brakes? wkfrst XJ Cherokee Technical Forum 7 07-09-2007 11:02 PM
Back drum brakes to disc brakes Mtxz453 XJ Cherokee Technical Forum 17 12-24-2005 09:17 PM
parking brakes & lift ? ChewyXJ XJ Cherokee Technical Forum 5 04-08-2005 10:04 AM
Bleeding brakes for lift w^rl0rd XJ Cherokee Technical Forum 6 03-28-2005 07:08 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome