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Old 11-14-2011, 08:30 PM   #1
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Brake conversion

I'm wanting to do an inexpensive disc brake conversion on my 05 tj. Any advise?

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Old 11-14-2011, 08:32 PM   #2
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Get rid of your big tires and go back to stock. You'll probably pocket money.

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Old 11-14-2011, 08:39 PM   #3
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Only running 33's but would like the disc in the rear for better breaking. Plus the Willys would look a little funny on stockers with a 4.5 inch lift.
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Old 11-14-2011, 08:54 PM   #4
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There is no such thing as an an inexpensive rear brake conversion. And unless your back brakes are not working at all, it won't stop any better anyway.
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Old 11-14-2011, 09:33 PM   #5
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Got ya. So what I'm hearing is there is no reason for me to do a rear disc conversion, just stick with the drums??
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Old 11-14-2011, 09:55 PM   #6
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Originally Posted by willys05tj View Post
Got ya. So what I'm hearing is there is no reason for me to do a rear disc conversion, just stick with the drums??
if you're looking for a big improvement in braking performance, a rear disc conversion isn't it.

spend your money on Vanco brakes in front
www.vancopbs.com
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Old 11-14-2011, 09:56 PM   #7
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Got ya. So what I'm hearing is there is no reason for me to do a rear disc conversion, just stick with the drums??
There are many reasons to do a rear disc brake conversion. Easier maintenance, no continual adjustment, pedal height remains the same throughout the life of the friction material, they work slightly better in reverse, less affected by mud and silt, and the parking brake actually works as good as or better than the drum set-up.

Notice none of those reasons are better braking going forward.
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Old 11-14-2011, 10:04 PM   #8
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The no adjustment part is my favorite. I recently did the backs again as the parking brake was clicking up more and holding less. Made a difference in the pedal feel too, I guess that's what you mean by the height, feels firmer now.
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Old 11-15-2011, 07:21 AM   #9
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Well, CRAP! Blaine, I guess that means that I did not set up my parking brake correctly because it wont hold on a slight incline. 8.8 parking brake pads are small compared to the old 35 so I just assumed that it was as good as it gets.
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Old 11-15-2011, 08:26 AM   #10
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Well, CRAP! Blaine, I guess that means that I did not set up my parking brake correctly because it wont hold on a slight incline. 8.8 parking brake pads are small compared to the old 35 so I just assumed that it was as good as it gets.
Loosen the cables at the splitter under the tub. Adjust the star wheel on the adjuster in the drum brake until you can barely turn the tire.

That should make the PB handle only go up about 3-4 clicks when fully applied.

Then, go for a very short drive and while going slow, depress the PB release button on the handle and hold it there while applying the brake while driving until you feel drag, back it off and do it again.

Basically you're trying to slowly grind the shoes to the shape of the drums and knock down the high spots on their surface.

Take it back and do the adjustment at the star wheel again until you get some decent drag.

You know you've done it correctly if you get several more clicks after the bedding and after the adjustment, it now holds much better.
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Old 11-15-2011, 08:29 AM   #11
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I'm wanting to do an inexpensive disc brake conversion on my 05 tj. Any advise?
Figure out which axle your rear is and go to the local junk yard. Find a Grand Cherokee with discs in the rear and get everything off of it. Brackets, calipers, lines, ebrake cable, and rotors. Also there is a guy on ebay that is selling the above mentioned for a bit over $200 on buy it now or you can keep an eye out for some of his auctions. I have seen them go for as little as $55 with another 50~ for shipping.

Just remember you will not get anymore real braking performance out of a disc swap. The only major benefit to converting is ease of replacement.
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Old 11-15-2011, 09:58 AM   #12
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Mr. Blaine, Thank you sir!
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Old 11-15-2011, 02:54 PM   #13
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Mr. Blaine, Thank you sir!
You're very welcome. A lot of folks don't give that little parking brake set up the due it deserves. It can be adjusted to hold well enough to break the cast backing plate.



Piece laying in the middle got broken off which let the shoes spin around. On a trail ride, a feller let his newbie wife try her hand at 4 low. Unfortunately she was parked behind me and dumped the clutch before I started moving. I gunned it to keep her from hitting me and I forgot I had set the brake.
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Old 05-08-2012, 03:16 AM   #14
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Loosen the cables at the splitter under the tub. Adjust the star wheel on the adjuster in the drum brake until you can barely turn the tire.

That should make the PB handle only go up about 3-4 clicks when fully applied.

Then, go for a very short drive and while going slow, depress the PB release button on the handle and hold it there while applying the brake while driving until you feel drag, back it off and do it again.

Basically you're trying to slowly grind the shoes to the shape of the drums and knock down the high spots on their surface.

Take it back and do the adjustment at the star wheel again until you get some decent drag.

You know you've done it correctly if you get several more clicks after the bedding and after the adjustment, it now holds much better.
Does this work the same way with Rubi lockers? As far as I know, the rear works as an LSD when not engaged, so would spinning the wheel with the rear in the air be any different?
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Old 05-08-2012, 08:23 AM   #15
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Does this work the same way with Rubi lockers? As far as I know, the rear works as an LSD when not engaged, so would spinning the wheel with the rear in the air be any different?
If you can't spin one, put both in the air.
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Old 05-18-2012, 05:22 PM   #16
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Got everything nice and tight now. Every part of the parking brake system was loose, but now it holds real good on a steep incline. Thanks again Blaine!
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Old 05-19-2012, 08:10 AM   #17
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I thought backing up and stopping was how the brakes auto tightened them.
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Old 05-19-2012, 08:44 AM   #18
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I thought backing up and stopping was how the brakes auto tightened them.
The parking brake for the rear disc brake set-up is essentially a small drum brake with shoes in what is referred to as a drum in hat rotor.

There is no provision to auto adjust them and they have to be manually adjusted. There is no need for an auto adjuster because it's not a service brake and is or should only be used for parking the vehicle and in the rare event of doing a panic stop, it's easy enough to re-adjust them to compensate for the wear incurred.

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