Brakes on 8.8 Diff - Pirate4x4.Com : 4x4 and Off-Road Forum

JNJTJ · 08-20-2009, 07:45 PM

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?

jrw7072009 · 08-21-2009, 12:04 AM

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.

y2knole · 08-21-2009, 04:43 AM

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.

Little Jeep · 08-21-2009, 05:18 AM

Quote:

Originally Posted by y2knole

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.

AlxJ64 · 08-21-2009, 05:20 AM

Quote:

Originally Posted by y2knole

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.

JNJTJ · 08-21-2009, 08:03 AM

Thanks guys, this helps lot, I'll start by bleeding the brakes agaiin and move on from there

MonsterSeven · 08-21-2009, 02:39 PM

didnt all 06 TJs have disc brakes in the rear?

00TJ4L · 08-21-2009, 04:49 PM

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.

AlxJ64 · 08-21-2009, 08:51 PM

Quote:

Originally Posted by 00TJ4L

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.

JNJTJ · 08-23-2009, 12:53 PM

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

08-20-2009, 07:45 PM	#1 (permalink)
JNJTJ Registered User Join Date: Jun 2009 Member # 137866 Location: Apple Valley, Ca. Posts: 58	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?

08-21-2009, 12:04 AM	#2 (permalink)
jrw7072009 Granite Guru Join Date: May 2009 Member # 135054 Location: Las Vegas, NV Posts: 617	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. __________________ OverRockOffRoad.co OverRockOffRoad.com Get Bent Fab Works Full Flex Offroad CalROCS.com Crawlin for Crohn's Last edited by jrw7072009; 08-21-2009 at 12:05 AM.

08-21-2009, 02:39 PM	#7 (permalink)
MonsterSeven Registered User Join Date: Feb 2008 Member # 108872 Location: Bennington, NE Posts: 781	didnt all 06 TJs have disc brakes in the rear? __________________ 98 RHD TJ: swapped 4.0L/AX-15/Dana 300, 4.88, AEV 3", LP9"/S88, Grizzly/Detroit, OTK steering, 35" muds... 84:1. 85 CJ-7: GM350/NV4500/D300, SOA on Wags, LP44/LP9", Aussies, 37" MT/Rs, Staun beadlocks, hi-steer, 110:1... in pieces.

08-23-2009, 12:53 PM	#10 (permalink)
JNJTJ Registered User Join Date: Jun 2009 Member # 137866 Location: Apple Valley, Ca. Posts: 58	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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08-21-2009, 04:43 AM	#3 (permalink)
y2knole Registered User Join Date: Feb 2007 Member # 87845 Location: Marietta, GA Posts: 1,175	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.

08-21-2009, 08:03 AM	#6 (permalink)
JNJTJ Registered User Join Date: Jun 2009 Member # 137866 Location: Apple Valley, Ca. Posts: 58	Thanks guys, this helps lot, I'll start by bleeding the brakes agaiin and move on from there

08-21-2009, 04:49 PM	#8 (permalink)
00TJ4L Registered User Join Date: Jun 2008 Member # 115721 Posts: 53	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.