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I machined a set of IFS hubs for one of my good friends, and he is going to be making an install video of the Big Brake Mod on the front of his truck. I will be posting the video here when he is done!
*** i reuploaded the images to my website instead of photobucket, because they changed their policies, and no longer honor the decade-old members with free accounts! ***
Well, i have a 1985 toyota 4x4. i had the stock brake system, and it wasnt bad, but it wasnt anything special, thats for sure!
i did some research, and came up with everything i needed for the swap!
tools and stuff needed:
1/2" fine thread tap
1/2" drill bit
angle grinder (or lathe if you have access to one)
4x 1/2" fine thread, gr.8 1.25" long bolts
first off, for the front, i used:
1998 Toyota Tacoma rotors
1994 Toyota Pickup v6 calipers
1986 Toyota Pickup hubs
some slight modification had to be done to both the calipers and the steering knuckle. both are no big deal!
you do have to modify the IFS hubs though... if you dont have access to a lathe, you can use an angle grinder, just be careful not to take off too much material...
had to throw the hubs on my lathe to turn down the little ear things...
i had to take down a bit more than this, but you get the idea
use the 1/2" fine thread tap on the mounting ears of the caliper.
then use the 1/2" drill bit on the mounting ears of the solid axle knuckles. you just need to hog out enough material to fit a fine thread 1/2" bolt.
now the 98 tacoma rotors fit overtop of the hubs!
tapped the 94 V6 calipers (i think these ones are 86 calipers though... notice the 2 sizes of pistons... the smaller ones are closest to the camera, the larger pistons are under the brake line fitting)
the calipers now mount on the outside of the ears, instead of the inside, but its no less strong... now all i have to do to change rotors is remove the wheel, and unbolt the caliper!
Here is a before and after:
for the rear, i used: (you will have all this stuff laying around after the front is done)
1985 Toyota Pickup solid axle rotors
1985 Toyota Pickup solid axle calipers
1985 Toyota Pickup solid axle lug studs
i pounded out the old studs off the axle shaft and had to grind down a hair off the axle on the inside where the rotor has to sit...
once the rotor sat flush, i just installed the longer solid axle studs and bob's your uncle!
pretty good stuff! i had to make a set of wheel spacers (only 1/4" though) so i could bolt the wheel on... the shoulder of the longer studs is a hair too far out...
i saw what i needed to do, so i drew up some brackets on some 1/4" steel (i think it was 1/4"... either that or 5/16")
i cleaned the pieces up a bit, then marked where i needed to, and drilled holes
i didnt like how much space was left...
tapped the 85 solid axle calipers to 1/2" thread
i ended up cutting out another set, slightly smaller, and welding them to the plates. super beef!
no more gaps, and no chance of ever bending it haha
after doing this swap, the brake pedal became SUPER stiff! it was really hard to push the pedal, but i could still stop. The solution to this, is a Tacoma brake booster! i also used a Tacoma brake master cylinder
i am not running a proportioning valve, and the rear does lock up before the front, so its a little sketchy driving on ice or super slippery surfaces, but the increased braking power is just unbelievable! on the trail, its just perfect! for street use, i recommend a prop. valve! i was pulling a 2300lb, 6x12' dual axle uhaul trailer loaded with my in-laws stuff when i helped them move, and had absolutely no problem stopping it!
i hope this writeup helps anyone out who is interested in doing this swap too! happy wheelin!