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Unread 08-02-2004, 04:25 PM   #1
AMK
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8.25 rear disc conversion - Pics & Write up soon

Drums in place:


Drums gone :


Disc brake bracket in place:


Axle shaft in place:


Rotor and caliper in place:


-------
Yay for disc brakes. On the street, brakes feel 100% better than drums. I will have a full write up and trail report soon.

Any questions? Let me know.

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Last edited by AMK; 08-02-2004 at 04:39 PM..
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Unread 08-02-2004, 04:45 PM   #2
MSHarnett
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Yeah I got a few. What things did you have to buy, and how much did it cost? I plan on doing this, so make your right up good enough for a dummy like me, haha

Oh yeah, did you have to play with the porpotioning vavle ( don't even kow what that is or how to adjust it.
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Unread 08-02-2004, 04:50 PM   #3
ChiTown'01XJ
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OMG I just had an unerotic orgasm! This is exactly what I've been waiting for!!!! Can't wait for your write up and thanks in advance!
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Unread 08-02-2004, 08:25 PM   #4
AMK
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Quote:
Originally Posted by MSHarnett
Yeah I got a few. What things did you have to buy, and how much did it cost? I plan on doing this, so make your right up good enough for a dummy like me, haha

Oh yeah, did you have to play with the porpotioning vavle ( don't even kow what that is or how to adjust it.
Parts:
1) ZJ caliper brackets
2) ZJ rotors
3) ZJ rear calipers
4) ZJ caliper soft lines

I have Ford Crown Victoria rear caliper brackets and I was meaning to do a test fit with them, but got excited and by the time I remembered I had everything back together. The Crown Vic brackets are almost identical to the ZJ brackets and the ZJ calipers bolted to the Crown Vic brackets.. Not sure about final fitment though.

The stock proportioning valve works fine with the rear disc, but it does not work the rear brakes very hard. The rear brakes work great, but I cannot lock them up on dry pavement. If in the future more rear brake power is desired, there two options: One, swap in a ZJ proportioning valve, or two remove the O-ring from the stock proportioning valve where the rear line attaches.

For now though, the brakes are 100% better than before.

Full write up coming soon..
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Unread 08-02-2004, 08:49 PM   #5
MSHarnett
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Damnit, write up NOW, haha. just kiddin, take you time, I'm broke anyway.

How does the ZJ caliper bracket attach to the axle, aren't they for a dana 35? Did ou buy brand new ZJ parts or was it a junk yard deal? Money...How much am I lookin at.
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Unread 08-03-2004, 12:12 AM   #6
MSHarnett
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What about the E brake, does that still work??? Thats a pretty important part of inspection, please, I'm dying over hear, I've been waiting forever to do this mod.
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Unread 08-03-2004, 07:40 AM   #7
AMK
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Quote:
Originally Posted by MSHarnett
What about the E brake, does that still work??? Thats a pretty important part of inspection, please, I'm dying over hear, I've been waiting forever to do this mod.
ZJs use an internal drum for a parking brake. If you get brackets that have the dust shield and all of the hardware, as shown in the third picture, the parking brake can be rigged to work.

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Unread 08-03-2004, 10:14 AM   #8
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very nice.. i may end up doing the conversion.. i was seriously thinking about it before.. now i just want it.
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Unread 08-03-2004, 10:53 AM   #9
greenlawnjeeper
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Quote:
Originally Posted by kapplera

Any questions? Let me know.
Yea, just one. When will you be over to do mine? Excellent job!
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Unread 08-03-2004, 05:29 PM   #10
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Cost?


looks good
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Unread 08-03-2004, 05:37 PM   #11
AMK
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I was able to get both brackets for $150 with the drum hardware. The calipers were another $50 each and the soft lines were $20 each. Rotors were about $20 each as well. It is a good time to do axle seals, so I did that too, so about $7 each for them.

So.. about $344 for the whole conversion. Well worth it when you look at the cost of completely rebuilding the rear brakes (which I did several times).

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Unread 08-04-2004, 04:59 PM   #12
ChiTown'01XJ
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You finish the write-up yet?
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Unread 08-04-2004, 05:15 PM   #13
ctavel
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Yeah its right HERE
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