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Old 08-20-2009, 07:45 PM   #1 (permalink)
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Brakes on 8.8 Diff

I'm a newbie so go easy on me, I have an 06 TJ I just did a Ford 8.8 diff with disc brakes swap. The problem is the rear brakes seem to work but not very well. I've done some research and have found some people talking about taking a master cylinder from a Dodge P/U and putting it in a jeep and other people not doing anything saying it works well enough. Since this TJ is also our daily driver I would like to have better then well enough brakes. As for the E-brakes I found a kit from M.O.R.E. Offroad that I can use. Can anyone help me with my problem?
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Old 08-21-2009, 12:04 AM   #2 (permalink)
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On a 06 I would say you should be ok with what you have. I have a few customers with 8.8s with discs in there TJs and there brakes work fine. I would double check and bleed the heck out of the rears make sure there is no air in them at all before changing out your master cylinder.
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Old 08-21-2009, 04:43 AM   #3 (permalink)
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look for the porportioning valve mod.

lots of people have pulled this little grommit out of their stock MC to address this issue.

in my case, rear brakes seem fine, and I havent found this mod necessary.
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Old 08-21-2009, 05:18 AM   #4 (permalink)
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Quote:
Originally Posted by y2knole View Post
look for the porportioning valve mod.

lots of people have pulled this little grommit out of their stock MC to address this issue.

in my case, rear brakes seem fine, and I havent found this mod necessary.
I agree....... on an 06 you shouldn't have any issues. I did the swap on my 1998 and never saw the need to mess with the combination/proportioning valve. Are you sure you have the calipers on the correct sides? Bleeder valve should be at highest point..... if not, you will never be able to get all the air bled out.
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Old 08-21-2009, 05:20 AM   #5 (permalink)
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Quote:
Originally Posted by y2knole View Post
look for the porportioning valve mod.

lots of people have pulled this little grommit out of their stock MC to address this issue.

in my case, rear brakes seem fine, and I havent found this mod necessary.
I have done a few 8.8 swaps as well, including in my old daily driver. I snagged a prop valve out of a V-8 Disc rear grand cherokee and swapped that in. Compared to with the stock valve and the ZJ valve, it stopped twice as good.
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Old 08-21-2009, 08:03 AM   #6 (permalink)
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Thanks guys, this helps lot, I'll start by bleeding the brakes agaiin and move on from there
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Old 08-21-2009, 02:39 PM   #7 (permalink)
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didnt all 06 TJs have disc brakes in the rear?
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Old 08-21-2009, 04:49 PM   #8 (permalink)
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Did the "grommet" mod on my master cylinder, works great.

Also, if you haven't already bought the MORE kit, look into stock ZJ brake cables. I use them and they work fine, and are cheaper. I think they were about $35 each from the stealership.
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Old 08-21-2009, 08:51 PM   #9 (permalink)
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Originally Posted by 00TJ4L View Post
Did the "grommet" mod on my master cylinder, works great.

Also, if you haven't already bought the MORE kit, look into stock ZJ brake cables. I use them and they work fine, and are cheaper. I think they were about $35 each from the stealership.
I've always used stock cables... Just cut a few loops of the guard cable off of the end, and with a small ferrel and a clamp you can clamp around the lever arm and it works great.
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Old 08-23-2009, 12:53 PM   #10 (permalink)
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brake cables

Thanks guys, those are both great ideas I'll try that before spending $125 on cables from M.O.R.E. then if I don't like the way it works I always have the option of buying cables
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