need better brakes -

LinkBack Thread Tools
post #1 of 20 Old 07-06-2010, 05:21 PM Thread Starter
Registered User
1979 CJ7 
Join Date: Jun 2010
Location: nashville
Posts: 1,898
need better brakes

i need some ideas for improving the brakes, it has disk in the front and drums in the rear and no booster. i was going to use some disks that fit the front and make a rear disk kit but the center hole isnt big enough, i would buy a kit but they cost a fortune. Any help would be greatly appreciated.

twinstickd20 is offline  
Sponsored Links
post #2 of 20 Old 07-06-2010, 05:33 PM
Registered User
1978 CJ5 
Join Date: Jun 2009
Location: Kingsland
Posts: 823
Why do you need brakes? These jeeps dont weigh much at all.
crzdmnky is offline  
post #3 of 20 Old 07-06-2010, 05:58 PM Thread Starter
Registered User
1979 CJ7 
Join Date: Jun 2010
Location: nashville
Posts: 1,898
they probably work fine with factory tires, but not so well with 35s
twinstickd20 is offline  
post #4 of 20 Old 07-06-2010, 06:10 PM
Corripe Cervisiam
Ken4444's Avatar
1985 CJ7 
Join Date: Oct 2005
Posts: 6,731
Originally Posted by twinstickd20 View Post
i need some ideas for improving the brakes..
Are you looking for a hardware upgrade, or tips for improving performance with the existing system?

I agree that 35" tires are going to strain the braking system, but I don't see the point of throwing new or recycled hardware 'improvements' at a CJ (or any vehicle), if the existing braking system hasn't already been fixed/adjusted/maintained, especially if you are working with a modest budget.

I'm no brake expert, but I would start with the basics: Check for leaks. Check the brake fluid level. Then bleed the brakes. If the fluid is of an unknown age, you might consider pumping entirely new fluid into it during the bleed procedure.

After that, the next step might be new pads. Of course if you're going to install new pads, then the state of the rotors and calipers comes into play as well. The braking system is, afterall, a system.

Just my 2 cents

"I give you a republic, if you can keep it." - Benjamin Franklin
Ken4444 is offline  
post #5 of 20 Old 07-06-2010, 06:14 PM
Registered User
1978 CJ5 
Join Date: Jun 2009
Location: Kingsland
Posts: 823
Eh yeah, hmm. I only use the brakes for fast stops and holding my jeep at stops. Other than that I tranny brake. So I dont know what to say.
crzdmnky is offline  
post #6 of 20 Old 07-06-2010, 08:28 PM Thread Starter
Registered User
1979 CJ7 
Join Date: Jun 2010
Location: nashville
Posts: 1,898
im really trying to decide if i want to add a booster or change the rear drums to disk
twinstickd20 is offline  
post #7 of 20 Old 07-06-2010, 08:33 PM
Registered User
1978 CJ5 
Join Date: Jun 2009
Location: Kingsland
Posts: 823
Booster would be easier and cheaper. I have never been a real big fan of rear disc brakes. Just seems weird to me.

What I dont understand is why you say it doesnt stop very good with 35" tires. Many ppl pull their boats and what not with their CJs and dont usually seem to have a problem, other than it has a real short wheel base.
crzdmnky is offline  
post #8 of 20 Old 07-06-2010, 11:51 PM
Registered User
2005 WK 
Join Date: Jun 2009
Location: Bay Area
Posts: 115
I'm running the following:

-Stock disc brake 30 up front

-Pedal assembly and booster off a '91 Cherokee
-Master Cylinder off a 68 vette (power brake model, has a larger piston)

-Rear calipers off an mid 80's Chevy fullsize truck
-Rear rotors off a mid 90's f-150 (just need to take a touch off the center hole to clear the axle flange)
-Rear brake lines off a mid 80's Chevy fullsize car (Impala, Bel Air, etc)
-Standard Summit Racing adjustable proportioning valve
-Disc brake brackets from Ruff Stuff

I went from two footed braking to being able to lock up the tires as will. Huge difference from the old disc/drum/manual setup.

Hope this helps

mdimmick is offline  
post #9 of 20 Old 07-07-2010, 03:31 AM
Registered User
1981 CJ7 
Join Date: Jul 2007
Location: eastern Europe
Posts: 214
Wrangler or XJ* booster will help you a lot if you have oversized tires near 35 size. IMHO I don't understand the above arguments that if it is stock why to change it and check for leaks instead. Sorry guys but I doubt you have ever driven CJ with 35 tires and manual brakes (those who are saying stock setup is OK).

*will need extending main pushrod by some 1", and wrangler spacer which is easy to manufacture if you have no partsyard nearby. + brake flaring work/fittings etc.
pazur is offline  
post #10 of 20 Old 07-07-2010, 03:47 AM
Registered User
1979 CJ7 
Join Date: May 2008
Location: Locust Grove
Posts: 1,467
Go find yourself a 95 YJ booster and leave your rear drums on. That year has a double diaphragm. And it will stop your Jeep and your 35's just fine.
This is what I have on my 77 CJ and it works great!

'77 CJ-5 Renegade 304 / T-150, Dana 20, 30/20 axles, Aussie Locker in the Dana 30, American Racing 15x10 Outlaw II's, 33" Dynapro M/T's" ,Optima Battery, TeamRushed + Summit Racing CDI ignition, FlowKooler water pump, Edelbrock Performer Intake Manifold, Holley 4160 390cfm, Herculiner, Silver Ceramic Coated Hedman Hedders, Flowmaster 40's.
Warn PowerPlant HD 12K Winch, Dirtworx front and rear bumpers.
scottymac62 is offline  
post #11 of 20 Old 07-07-2010, 03:48 AM
Registered User
1978 CJ7 
Join Date: May 2009
Location: Seattle
Posts: 464
Definitely a booster.No question
Lordwrench is offline  
post #12 of 20 Old 07-07-2010, 06:30 AM
Happy Joe
Registered User
1985 CJ7 
Join Date: Jun 2007
Location: Colorado
Posts: 2,365
Just an opinion, mind you;
I currently run 35s with early 5 lug Cherokee Dana 44 rear drums and stock (thick rotor) '81 disks up front; even running a booster the brakes are marginal when trying to bring the Jeep down to a quick stop from interstate speeds.
I suggest 4 wheel disk brakes (there are many junkyard variants, I like GM/Wagoneer backing plates & calipers with scout rotors (front and rear). Either modify the rotor center hole to fit over the rear axle or turn down the rear axle flanges. We have done this several times and gotten exceptional performance, every time (being rear ended during a quick stop is a real concern). Use an adequate master cylinder.
The stock CJ brakes are OK for 33s but I have yet to see good braking performance with stock/near stock brakes and 35s on a CJ.


...a well prepped, well driven, vehicle should do well in any terrain, including the highway.

Carburetors became obsolete during the last century... do what ever it takes to get fuel injection...It makes bigger grins off road.
Happy Joe is offline  
post #13 of 20 Old 07-07-2010, 06:41 AM
Registered User
1986 CJ7 
Join Date: Mar 2010
Location: iowa
Posts: 207
I currently run 35's on my cj5 without power brakes and love it...It holds on hills and stops just fine....I think u might want to try adjusting the rears and checking things over again. I was currently running power brakes on it and switched over to manual i like the feel of manual brakes that are set up right over power...But its just a preferance....

Its a jeep thing...Hell nobody understands!!!!
josh97 is offline  
post #14 of 20 Old 07-07-2010, 06:47 AM
Web Wheeler
Jim1611's Avatar
1985 CJ7 
Join Date: Jul 2009
Posts: 7,142
What I am in the process on my CJ-7 is installing rear disc brakes and a booster on the master cylinder. Yes the disc brake kits are high but you can also gather the parts that can be bought from a parts store and do it yourself if you have the ability to fab some brackets and set things up correctly. I think in the end you'll have a much better system in going this way. I had an International Scout that had about the same sytem as the stock CJ and with 36" tires it was a fright to get stopped, much less hold it on a steep hill. In my opinion you need better brakes than factory with 36" tires and you no doubt have a lift and that also has an affect on the performance of your brakes.
Jim1611 is offline  
post #15 of 20 Old 07-07-2010, 06:48 AM
Registered User
2006 TJ Wrangler 
Join Date: May 2008
Location: Alpine, Tx.
Posts: 3,173
What Scottymac62 said.

I had a stock brake system on my 85, with disc/drum. Added the power booster, bracket, and adjustable rod, and now my brakes are perhaps too good! I run 33's. I believe this to be your cheapest solution.

'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
BioTex is offline  

brakes , improvement , performance , cj , disc , drum

Quick Reply

Register Now

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

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


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

Email Address:


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
Need opinion....Manual Brakes/360 to Power Brakes Rollbar Jeep CJ Forum 16 04-08-2009 10:06 PM
cj brakes to power brakes worth it? drunkenrich Jeep CJ Forum 21 02-15-2008 02:25 PM
Manual brakes to power brakes theclothman Jeep CJ Forum 17 06-18-2007 04:40 PM
Manual brakes to power brakes. NOVACAIN350 Jeep CJ Forum 4 04-27-2007 08:16 PM
Hydraulic brakes to power brakes question Jeep'N 4 Fun Jeep CJ Forum 5 03-05-2003 10:00 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