Installing Mopar JL HD Brakes / big brake kit 77072434 on a Jeep JK

[@EricCantin]

J8 Master Cylinder and Booster video is live: kzbin.info/www/bejne/iIavlHebqbqmfa8

[@matthewsciarrotta2118]

Eric - Great video and preview of this. I was able to complete the install over the course of a weekend taking my time in my garage. Brakes feel great on my 2016, I believe the larger master is on this vehicle from the factory. Anyway - thanks again for the detailed install and lending the confidence for me to get this done!

[@hypothermix]

Thanks for this video. I just recently ordered the JL HD brake kit from powerstop after watching this. I just got the j8 booster/master in as well as the rear calipers/rotors. Waiting for the fronts to come in to start the install.

[@EricCantin]

I should go install the J8 brake booster / master.

[@leaky8]

Dude, this is awesome. Can't wait to try this on my JK. You would definitely think there would be more posts about this.....

[@EricCantin]

Thanks! I was blown away that I couldn't find anyone else talking about this upgrade.

[@leaky8]

@@EricCantin Just as your video pointed out, a few cuts on the front rock shield with a dremel and the JL/JT brakes are on my 08 JK. incredible difference when combined with the J8 master cyl. You sir are a true American hero.

[@TDONLEY91]

@@leaky8 have you tried this on a manual jk, and if so did you have to relocate anything for the clutch?

[@chrisreynolds7183]

Great video! Info is clear, concise and no rambling on like so many other. AND you included all the part numbers and socket sizes.

[@EricCantin]

Thanks for the feedback. Figured I'd focus on the important info instead of dragging it on and on and on.

[@dankarell]

Great Video Eric

[@greggszyp7371]

Thank you very much for all your time and effort making these videos. Do you happen to know the bore diameter of the J8 master cyl.?

[@EricCantin]

I think 1-1/8”.

[@mefobiajeep9866]

Hello, So is this just OEM JL Rubicon "HD" rotors, and Calipers/pads? I have the J8 ready to go on, but found JLS HD reman MOPAR calipers and new rotors for about $400

[@EricCantin]

Yes. Depending on the year and options, other models had the same rotors calipers and pads, but only one size was offered on the Rubicons. The Xtreme Recon seems to use the Glatiator rotors which have better cooling. Haven’t taken a rotor off to see if the normal Rubicon rotors are interchangeable.

[@mefobiajeep9866]

Thank you@@EricCantin I am going to do Gladdy calipers , brackets and rotors up front for now.

[@AZOTH99eod]

I have seen a few times. Anti seize on brake bolts. And have seen use locktite. I would worrry about anti seize and brake bolt backing out. Thoughts?

[@EricCantin]

I might be lucky, but I’ve only had suspension hardware covered in anti seize loosen, but that also happens on dry fasteners and even loctite didn’t do the trick. I tear apart and service brakes at least twice a year, so have lots of opportunities to catch anything loosening.

[@AZOTH99eod]

@@EricCantin Thank you for the reply.. I was curious as I am about to do mine. I just got JL powerstop front caliper and rotor. and lucked out an a deal with Baer rear set same as factory rotor size but 4 piston caliper so I figured it is worth it. again thanks for the reply AL

[@geneoarboto1716]

Eric. Great installation video. I have been wondering about wether the JL brakes would fit on the JK, like many others. I am currently out of country for work and need to order an upgrade to the brakes on my ‘12 JKUR. Since my son works at NAPA. I can have him source the parts. This way I can have what I need to get this done as soon as I get home in late May. I was wondering if you have been able to test if the brakes are working as intended? Especially the rears. Since you seemed to have some hesitation about figment and functionality in the video. Additionally, do you have a part number/source for the kit you used? Thanks.

[@EricCantin]

Thanks! The brake feel is very balanced between both axles. And brake lock diff works as it should. It went together easier than I expected, and was constantly waiting for the ohh crap moment (that never happened). The stock master cylinder is certainly undersized for these larger calipers. I should have the J8 master cylinder and booster installed by this weekend to address that issue. Another video installation will follow. I used the Mopar kit (the part number is in the video title). Others are sourcing the same parts JL Rubicon brake parts from 3rd party vendors. Good luck!

[@MrGFCH]

Interesting and intriguing idea. Just to make it clear.. This kit is a direct bolt on to a JK ? I have a 2008 JKU. If I look up the part number it says will not fit a 2008 JK. And woul you have the installed dimension of the new set up? as in Diameter, trying to ascertain if my rims will clear the caliper

[@EricCantin]

They bolted up to my JKU. Only had to “mod” the shield. Very common for a part to be designed for one vehicle but work on another (especially JL vs JK). I didn’t measure the parts, but fit fine with the stock 17” wheels I have. If you see your wheels on a JL Rubicon you know they will clear.

[@MrGFCH]

@@EricCantin Thank you Eric. Just difficult to believe it's that easy!

[@MrGFCH]

@@EricCantin Another question popped up. I saw a note somewhere the larger brake booster interfered with the Clutch master and needed an alternative as well. Was your swap an Auto and do you know what the clutch issue is? Thanks again

[@EricCantin]

Mine is auto, so didn’t have that issue. Might need to relocate the existing reservoir or get an aftermarket one.

[@MrGFCH]

@@EricCantin Thank you..

[@louislombas3120]

So the JL kit should work on JK's with the Dana 30 axles also? I believe the brakes are the same on the JK's on the Dana 30 and Dana 44 models?

[@EricCantin]

This Jeep has a Dana 30 front axle. As far as I know, all JKs use the same knuckle (unless RHD) and all have the same caliper bracket mounting points. Good luck!

[@hexoden5027]

Overall this is excellent info! The only question I have is : did you use spacers to fit the brakes on the factory Moabs? That's the only thing stopping be from pulling the trigger. Thanks!

[@EricCantin]

I added the spacers due to tire width / to clear the swaybar & frame before doing this modification. If you rewatch the video, I do show how the Moab wheels cleared these calipers before reinstalling the wheel spacers. Balancing weights will dictate if it works or not.

[@vaneekhoutfamily]

Any luck getting your j8 kit yet? If so, I would love to see an install on this. I'm still waiting for the j8 kit before I install everything. I got lucky on the brakes that had only 60 miles on them, $300.

[@EricCantin]

Nope, still patiently waiting for it to arrive. I'll try to document the J8 install. Sweet score!

[@kswyg001]

Any update on the feel here? I need more bite in the rear after moving to beadlock wheels and 35's. I've been looking at the Teraflex or G2 rear kit that includes larger diameter rotors as an aggressive pad just isn't enough anymore.

[@EricCantin]

When paired with the J8 master cylinder and booster, this kit stops my JKU like a totally different vehicle. Parts are on order to do the same mods to my wife's JKU.

[@taylorcampbell985]

Hey did you re use factory banjo bolts?

[@EricCantin]

I think the kit came with new ones. Online the part numbers are different but they seem to use the same photo.

[@DR-rk4qu]

Any issues with balancing your tires with regards to clearance? I have a 2015 JKU rubicon and considering this. I have the stock 17” rubicon wheels. I figure it should fit since the JL rubicon also uses 17” wheels. Did you have any issues with your wheels weights?

[@EricCantin]

I think I showed clearance with stock wheels before installing the wheel adapters. Seemed like inside wheel weights could clear if mounted on lip and not stuck on. Correct, since these are JL brakes and the caliper is perfectly centered on the rotor, JL rims should clear identically as if they were on a JL.

[@cbrown17982010]

Is there any benefit of using these JL brakes compared to using the Mopar big brake kit (paired with the J8 and new master cylinder) for the JK? Seems like the only major difference is the rear calipers have a larger piston. . .Thanks!

[@EricCantin]

I went this route for ease of finding replacement parts in the future. From what I could gather while researching the Mopar JK big brake kit, it uses the same booster and master cylinder available separately from the J8 (which I now have). The calipers and pads are readily available from a Ram or other vehicles, but the caliper brackets and rotors are specific to the kit (not a stock part used on other North American vehicles). So finding those replacement parts at a parts store will be challenging and could leave your Jeep unusable for a few days. With the JL HD brake kit, the parts are as common as the stock JK brake parts. The larger rear rotors, calipers and pads are a sweet bonus. Hope that helps!

[@stupidJeep]

Any issues with brake lines? Did you reuse what the JK had or swap to JL lines? My understanding is the JL lines are not the same thread at the hard-lines as JK. Was this an issue for you?

[@EricCantin]

I reused the JK lines, they attached nicely. I have different brake line anchors that may have mitigated any length issues.

[@josuemartinezmtz]

I found a complete set of front hd brakes from a jl rubicon for very cheap Would it be the same method ? Straight bolt on also ?

[@EricCantin]

JL Rubicon brakes would be the same as these. If installing on a JK/JKU, you'll likely find the stock master cylinder to require more brake pedal travel than stock.

[@y2kmadd]

Are the rotors and hats coated? Also, what size wheels do you have?

[@EricCantin]

They seem to be, and they still look good after one winter exposed to salt. Those are the OEM 17” wheels with 1” wheel spacers. I think I tested these rims without the wheel adapters, and the calipers cleared. Other OEM rims may need wheel adapters.

[@ProGamerLeague]

Did the kit come with a parts numbers sheet by any chance

[@EricCantin]

Unfortunately no, just installation instructions.

[@lloydrage]

awesome video, what year is your JK? I ask because from what I understand they changed the master cylinder in 2012 on the JK to bigger.

[@EricCantin]

Thanks! This one is a 2012, so should have the larger master cylinder VS the older JKs. It definitely needs more fluid capacity for these brakes to feel "right". So looking forward to getting the J8 booster and master cylinder.

[@TDONLEY91]

@@EricCantin will the J8 booster fit on a manual 2012 wrangler? I seeing that you need to relocate the clutch master cylinder reservoir?

[@EricCantin]

@@TDONLEY91 Good question. I don't have a manual so haven't researched it.

[@brianyuen1945]

Awesome video! Do you happen to have the individual part numbers for the kit components? I already have the Mopar front big brake kit for my JK and only need to upgrade the rear brakes. I believe I have the correct part numbers, but would like to cross reference them to make sure they are correct.

[@EricCantin]

Unfortunately I don't. Just go to your favourite Mopar website and check the individual parts for say a 2019 Jeep Wrangler Rubicon or any 2020 Gladiator. www.moparpartsgiant.com/parts-list/2019-jeep-wrangler/brakes/brakes_rear_disc.html?filter=(E=ERC;T=DFT;M=Rubicon%204WD)

[@brianyuen1945]

@@EricCantin Thanks for the link! The part I'm getting hung up on are the rear rotors. For a HD Rubicon it lists either 590AC or 592AC. I'm not sure on the differences, but what I could find by referencing other sites is that the 592AC has "FNC" associated with it (Ferritic Nitrocarburizing). I also saw the 590AC as being for manuals on one site. No dimensions are listed for either, so I could not compare them. Let me know if you are aware of any more differences between these two rotors.

[@EricCantin]

@@brianyuen1945 If you go generic aftermarket, they'll likely have one part that covers the 342mm rear rotors. When I have the choice between two almost identical parts, sometimes the wallet picks the cheaper part, or I decide to splurge and hope it was a good investment.

[@Donnythelatemodeltech]

Wow, bleed the abs module if you actually want that to work.

[@EricCantin]

Thanks for the feedback. Will take that into consideration.

[@Punkbillyfool]

It appears they Do NoT make them anymore

[@EricCantin]

Doh! So have to source the parts individually now.

[@bajamedic]

I just ditch the dust shield

[@oktanskioktan9372]

Tell me one thing why do you need bigger brakes on off-road vehicle? XD Stopping power is the same, weight is worse, clearance to rims is worse, mud problems are worse due to clearance. You would not tell me that you need better heat distortion after multiple stops from 140mph😂😂😂😂

[@EricCantin]

Cause the stock JK brakes are under sized. That’s why.