Brake Upgrade - The Tundra Mod (2 Viewers)

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I’m about to order some parts and I’m wondering if anyone has tried this with 13WM calipers and stock 15” wheels. I keep finding conflicting information about whether that will fit.

I also see that Sky sells a bracket with both the Tundra and later 4Runner caliper patterns; has anyone tried that bracket? It seems in the last few pages like people aren’t happy with the FROR brackets.
 
I’m about to order some parts and I’m wondering if anyone has tried this with 13WM calipers and stock 15” wheels. I keep finding conflicting information about whether that will fit.

I also see that Sky sells a bracket with both the Tundra and later 4Runner caliper patterns; has anyone tried that bracket? It seems in the last few pages like people aren’t happy with the FROR brackets.
I’m running the Sky’s kit. I’m using 04 4runner rotors and calipers (13wg). The caliper doesn’t fit over the bracket and rotor together. I can force it, but then either the caliper or rotor stays at an angle.

I emailed Sky’s asking them about this, but I haven’t found anyone else with this issue. It’s looks like I need a 3/16 spacer behind the bracket to bring the bracket closer to the rotor.

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I’m running the Sky’s kit. I’m using 04 4runner rotors and calipers (13wg). The caliper doesn’t fit over the bracket and rotor together. I can force it, but then either the caliper or rotor stays at an angle.

I emailed Sky’s asking them about this, but I haven’t found anyone else with this issue. It’s looks like I need a 3/16 spacer behind the bracket to bring the bracket closer to the Post in thread 'FitzJ60 1983 FJ60 Build'
Builds - FitzJ60 1983 FJ60 Build - https://forum.ih8mud.com/threads/fitzj60-1983-fj60-build.984217/post-11581904

Calipers are a different casting than the ones I used. Might be the issue and not the bracket. I ran the FROR bracket though.
 
Just to add to this thread: For what it is worth, most people just run the 4runner wheel studs. In my complete obsession with thread engagement pertaining to wheels, I found some good information searching and ordered some. These look like the perfect fit. They are about 1/4" longer to take up the space lost by mounting the rotor over the studs (thickness of the rotor mounting face.)

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Left to right, 85-95 4runner stud, new longer stud for various models, & fj60 front stud.


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Has anyone used the 2017+ 4Runner calipers without any fitment issues?

Yes. I am running those rotors and calipers and have setup a few 60’s with them

It’s actually 2010+up 4runner.

I many miles on this now, my wheel bearings are actually a little loose now actually so due for some maintenance.

I have hydroboost and a 1-1/4” GM master cylinder and can skid my 37’s at over 30 mph if desired.

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Yes. I am running those rotors and calipers and have setup a few 60’s with them

It’s actually 2010+up 4runner.

I many miles on this now, my wheel bearings are actually a little loose now actually so due for some maintenance.

I have hydroboost and a 1-1/4” GM master cylinder and can skid my 37’s at over 30 mph if desired.

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I actually was going to DM and ask you about how your experience went when you were questioning the hub fitment. So it does indeed just float? What hydro booster did you use?

Would you still run a hydro booster and same size MC for 31” tires?

hearing this makes me think this is def a far better spend of money than a rear brake disc conversion where a parking e brake is crazy expensive and other parking brake solutions seem very untested
 
I actually was going to DM and ask you about how your experience went when you were questioning the hub fitment. So it does indeed just float? What hydro booster did you use?

Would you still run a hydro booster and same size MC for 31” tires?

hearing this makes me think this is def a far better spend of money than a rear brake disc conversion where a parking e brake is crazy expensive and other parking brake solutions seem very untested

The inside of the rotor “hat” centers on the part of the wheel bearing hub that gets turned down so the rotor can fit over it. Hence why that operation needs to be machined vs. just hacking it up with a grinder.

The 13.5” rotors and hydroboost (what I am running) would be completely way over the top for 31” tires. The stock 60 series brakes, if functioning properly, are completely fine for 31.
 
The inside of the rotor “hat” centers on the part of the wheel bearing hub that gets turned down so the rotor can fit over it. Hence why that operation needs to be machined vs. just hacking it up with a grinder.

The 13.5” rotors and hydroboost (what I am running) would be completely way over the top for 31” tires. The stock 60 series brakes, if functioning properly, are completely fine for 31.

I feel The braking is “adequate”. Firm pedal feel and pressure. Would love to just get a little more braking power though. What are your thoughts on 4R calipers and brakes and upgrading the booster and/or cylinder to one of the Toyota ones?
 
I feel The braking is “adequate”. Firm pedal feel and pressure. Would love to just get a little more braking power though. What are your thoughts on 4R calipers and brakes and upgrading the booster and/or cylinder to one of the Toyota ones?

If you have already baselined your truck and are still not satisfied -
I would say the 00-06 Tundra brakes up front would be the way to go for you, with a T100 Master cylinder.
 
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If you have already baselined your truck and are not satisfied -
I would say the 00-06 Tundra brakes up front would be the way to go for you, with a T100 Master cylinder.
Makes sense, and leave the booster stock?

Fifth gen 4R brakes might be overkill it sounds like?
 
Makes sense, and leave the booster stock?

Fifth gen 4R brakes might be overkill it sounds like?

I wrote it twice:
The 13.5” rotors and hydroboost (what I am running) would be completely way over the top for 31” tires. The stock 60 series brakes, if functioning properly, are completely fine for 31.
If you have already baselined your truck and are still not satisfied -
I would say the 00-06 Tundra brakes up front would be the way to go for you, with a T100 Master cylinder.
 
Makes sense, and leave the booster stock?

Fifth gen 4R brakes might be overkill it sounds like?

An FJ-62 or 1995 4-Runner booster is ideal for both OEM brakes and this mod.

The stock FJ-60 booster is weak. If you're running a stock 60, you might want to try the 62 booster before embarking on the Tundra mod. A properly functioning 62 will brake just fine with 31" or smaller tires.

Having gone through the hassle of putting a rear 80 axle under an HJ, I wouldn't do it again. But this front brake mod was fantastic for running 33's on a heavy truck.
 
An FJ-62 or 1995 4-Runner booster is ideal for both OEM brakes and this mod.

The stock FJ-60 booster is weak. If you're running a stock 60, you might want to try the 62 booster before embarking on the Tundra mod. A properly functioning 62 will brake just fine with 31" or smaller tires.

Having gone through the hassle of putting a rear 80 axle under an HJ, I wouldn't do it again. But this front brake mod was fantastic for running 33's on a heavy truck.
Thank you for the input. It’s a 62 so it has a stock 62 booster. It has 31’s now but we all know this goes hahaha this will prob have 33’s in the not so distant future.
 
By request; here are a couple of pictures of wheel/tire position on the finished install. This HJ has both the Tundra brake mod on the front axle and an 80 Series rear axle mod and is running 285 70 r17's. These mods go together perfectly with similar outboard offsets and allow modern wheel options with deep back spacing.

Also, please note that this HJ has fender flares, which stick out 1.25" beyond US FJ's fenders. The 'look' is very natural with the flares but might show too much tire without flares. Beauty is in the eye of the beholder. Perhaps other mudders would post their results for comparison?

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I didn't see a confirmation on the bearings used. I assume the bearings for the hub, weather they are the same as my SA hubs I don't know? Also the selectable hub. Do I use my SA Aisin's or do I need the IFS or are they the same? Thanks
 
I didn't see a confirmation on the bearings used. I assume the bearings for the hub, weather they are the same as my SA hubs I don't know? Also the selectable hub. Do I use my SA Aisin's or do I need the IFS or are they the same? Thanks
You can use the same exact bearings and hubs. They are fully interchangable. Note that the IFS hub 'clutch' will have a different spline count and cannot be used on the landcuiser. The hub outer housings and dial are the same. The red color of the hub dial helps indicate it's IFS spline count versus gold color for landcruiser splines.
 
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By request; here are a couple of pictures of wheel/tire position on the finished install. This HJ has both the Tundra brake mod on the front axle and an 80 Series rear axle mod and is running 285 70 r17's. These mods go together perfectly with similar outboard offsets and allow modern wheel options with deep back spacing.

Also, please note that this HJ has fender flares, which stick out 1.25" beyond US FJ's fenders. The 'look' is very natural with the flares but might show too much tire without flares. Beauty is in the eye of the beholder. Perhaps other mudders would post their results for comparison?

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I used the 5th gen 4R brakes and my tires are pushed out quite a bit. I also do not intend on keeping these Method wheels )if anyone in the NYC area wants to buy them let me know) so I will def be finding a classic looking wheel with a better offset to fix this

New stock booster, 1” MC. The brakes feel fantastic. Much more travel in the pedal until it bites, and it’s much softer. But it’s still very predictable and snooth.

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