Best rear disc kit for the money using the BB 76-77 9 inch rearend

[widowmaker77]

My understanding is that it should. I am interested but that means I will also have to switch out brand new 15” wheels and 35” rubber to run the new kit. It will require at minimum a 17 wheel

This is pretty cool! I’m very interested in this setup. When I scavanged all my explorer efi and serpentine stuff I also grabbed all the rear disk brake stuff not realizing it wouldnt bolt up to my 77 housing. From what I understand it will only bolt to the 75 medium duty bronco axle housing.

 

[bigmuddy]

This new kit will provide the 77 with the correct offset with has been a problem previously.

 

[BigB]

I’m trying to figure out what centering ring I need to get for the rotor. I posted a thread about it in tech so if anyone is running aftermarket axles please help me out there.

I am surprised that range does not either supply centering rings or at least point you in the right direction of where to get them. Did you ask them?

 

[mdainsd]

Willwood for me. Not interested in GM calipers. Some of those kits want you to relocate the stock rear shock mount. Uh, no? These fit great with the Stroppe double shock setup.

 

[Got4wd]

I am surprised that range does not either supply centering rings or at least point you in the right direction of where to get them. Did you ask them?

I found a set and they work great. I think it was 20 bucks shipped. All the other rear disc brake kits minus wilwood don’t center either. Don’t know why. It was an easy fix.

 

[bigmuddy]

I found a set and they work great. I think it was 20 bucks shipped. All the other rear disc brake kits minus wilwood don’t center either. Don’t know why. It was an easy fix.

You are running a 17" wheel, correct?

 

[Got4wd]

You are running a 17" wheel, correct?

Yes I am. Once I find some wheel smith or similar brand that I like. 285/70/17 tires LUBR

 

[bigmuddy]

Yes I am. Once I find some wheel smith or similar brand that I like. 285/70/17 tires LUBR

thank you

 

[BigB]

I found a set and they work great. I think it was 20 bucks shipped. All the other rear disc brake kits minus wilwood don’t center either. Don’t know why. It was an easy fix.

Nice one.

You should post up the link so that others going this route can get them easily.

 

[Got4wd]

Nice one.

You should post up the link so that others going this route can get them easily.

INFINAUTO Car Wheel Hub Centric... https://www.amazon.com/dp/B0DPX7N1LV/?tag=classicbroncos-20

 

[Shimmy]

are the centric rings necessary? the fitment around the studs isn't in close tolerance to keep the rotor centered? is there concern that the ring sticks past the rotor surface preventing the wheel from sitting flush on the face?

 

[Got4wd]

are the centric rings necessary? the fitment around the studs isn't in close tolerance to keep the rotor centered? is there concern that the ring sticks past the rotor surface preventing the wheel from sitting flush on the face?

It might not be but I like the way it makes the rotor fit tighter. The ring wouldn’t come close since the front hub is bigger, if that makes sense

 

[BigB]

It might not be but I like the way it makes the rotor fit tighter. The ring wouldn’t come close since the front hub is bigger, if that makes sense

I'm no engineer though I've worked with plenty....The fact that Wilwood states you need to use these with their kits is enough to convince me that the rings take some stress away as opposed to not using them.

Cheap insurance plus it looks finished off.

 

[Shimmy]

I'm no engineer though I've worked with plenty....The fact that Wilwood states you need to use these with their kits is enough to convince me that the rings take some stress away as opposed to not using them.

Cheap insurance plus it looks finished off.

thats good know. i didn't realize wilwood had this on their kits and i see it now.

 

[DirtDonk]

I’ve never researched that aspect of their product line. Do they make difference spacers?
I mean, how does any manufacturer know what size the register is on your axel shafts?
Especially aftermarkets shafts, that might not be the same design/size as stock original.

 

[Got4wd]

I’ve never researched that aspect of their product line. Do they make difference spacers?
I mean, how does any manufacturer know what size the register is on your axel shafts?
Especially aftermarkets shafts, that might not be the same design/size as stock original.

There are a ton of different spaces. Most aftermarket axles are going to be the same since it’s going to index off of the factory drum.

 

[BigB]

I’ve never researched that aspect of their product line. Do they make difference spacers?
I mean, how does any manufacturer know what size the register is on your axel shafts?
Especially aftermarkets shafts, that might not be the same design/size as stock original.

Yes they make different sized spacers that cover the axles that their kits fit. If an aftermarket axle is not the right size etc then I'm certain they would state that their kit is not suitable.

Now I have not researched this extensively. I found this information as I purchased a 13" kit for my 69 Torino, secondhand. It was for a different offset axle and the axle register was also a different size. I emailed with a tech and he gave me the skinny on it all and helped me get the replacement parts needed.

From memory I think it states in the instructions that the axle register rings must be used.

Google fu:

• Prevents Wheel Stud Failure: If a rotor is loose on the register, it will rely on the wheel studs for centering. This puts excessive, unintended shear stress on the studs, which can lead to stud breakage and, in extreme cases, wheel loss.
• Accommodates Different Axle/Rotor Sizes: Wilwood brake kits are often designed to fit various vehicle applications, meaning the center hole in the rotor (often 3.06" or similar) may be larger than the axle's register (e.g., 2.80"). The adapter fills this gap to create a snug, precise fit.
• Improves Braking Performance: Properly centered rotors ensure consistent contact between the brake pad and rotor surface, which is essential for optimal stopping power and heat

 

[Shimmy]

well i'm gonna try this route out too. just bought the calipers and range kit. range seems to think the wilwood switch may work so ill purchase that too. rotors i'll source from rockauto