Jeep Dana 30 Big Brake Upgrade for 15 Inch Wheels 

Excellent write up. I just finished this conversion on my '86 XJ. If anyone else is doing this note that as far as the XJ is concerned there are 3 wheel bearing options. The 1984-1989(?), the 1990(?)-1999, and 1999-2001 bearings. Since mine is a 1986 with a 1985 axle for the 4x4 conversion I have the phase one bearings. Due to the offset of those bearings I didn't need any washers or other shims to line up the calipers. So if you are doing this brake upgrade use the early bearings, and grab a 1996 XJ booster for any 1984-1995 for a dual diaphragm upgrade (or you can use a 1996 GM Astro hydro boost unit). 4.6L @ 9.2:1 and a 68-232-4 cam, AX15 + NP242, D30HP + F8.8 Trac loc @ 3.55 on 225/75R16.

Just did this on my 89 Xj, Dana 30 version without the vacuum disconnect. For me there was no need to grind the hub assembly to make the rotor fit as mentioned on the Cobra Marty post on Cherokee Forum. This may be because I also used the Motorcraft rotors or because there are some variations in the bearing as mentioned in another comment. Also no shim washers needed for me, the bracket was only off center by about 1.5mm without them. Plenty of clearance on my Pro Comp steel rims (15x8 with 3.75 backspacing). I did have to grind a tiny bit at the top corner of the caliper where there is slight interference with the knuckle but that was it. For rotors, if you go with Motorcraft as in this video the BRR236 is now superseded by the BRRC105. I thought I was sent the wrong rotors but later confirmed with a Ford dealer that the BRRC105 is the new version. They worked just fine and an added bonus is that these these are coated rotors. The assembly itself seems solid. As for how they work, I can't say yet, I'm running the stock booster and master cylinder and they were terrible before this. Still researching upgrade options for those. The DIY big brake was step 1 of 2. I'll come back here to update for anyone trying this.

How has this held up for you? I did the 17” setup that cobramarty talked about on those old posts and I’ve had problems. I’m thinking since the knuckle setup is the same for both that maybe I’ll try this.

So ur telling me that 200-2111 grand cheroke knuckles will bolt right onto my 98 Jeep XJ??

What part number is the wilwood adjustable proportioning valve? Can you do a video on setting that up?

if im not Wrong you have a xj and the knuckle you have in your axel are not the OEM

Hello, will this work on a 90 jeep yj wrangler? It’s a 90 but everything on it is from late 80’s. V belts etc.

What size tires are running on that Dina 30 buddy

I have a 1989 YJ jeep and everything I can see inline is that the early XJ and YJ have the same steering knuckles, is that true? and would this work with my YJ since I have the older axle?

Weren't the knuckles on the Dana 30 from 87 to 98 the same? I have looked at online and the junk yard they all uses the same knuckles. Trying to do exactly what you did and the only knuckles that even cone close to fit those calipers are from the WJ but even those are 1/2 inch off from bolt hole to bolt hole. Did we miss something or are you running a special knuckles? We have read over that from about a dozen times now and the parts we ordered dont seem to line up.

does it fit factory 15 inch wheels? looking to run 10 spoke turbines, would love to upgrade my brakes

I have 99 jeep xj front axle under the front of my 93 jeep grand cherokee what do I need to make that set up work on the stock axle

Can you still use the stock master cylinder?

Link???

Would this kit work on a 1990 Jeep XJ with the stock front dana 30 ?

I have a 81 cj7 with a dana 30 will this work

What jeep are those calipers from?