Hey guys, I've tried searching, I have an 87 10 Bolt all rebuilt that came with my Formula, and over the years I've collected parts I knew would be difficult to find until I purchased another ThirdGen, but I have a set of 91 Rear disk backing plates, can the axle flange be modified to fit the backing plate?

I want to upgrade to 28 spline axles, and a new carrier, so if the axles will not work, it's not a big deal.

 

91 backing plates will bolt right on the 87 10bolt.

 

Even though the 87 flange is for a drum?

 

No. Easier to get the "hassle-free" brackets from Fly-n-bye.

Otherwise you have to cut, drill, shim, and concentric ring the drum rear.

 

Since it wasn't mentioned, I incorrectly assumed the 87 rear was a disc also.

I have cut and drilled to flange to make disc work on a drum rear b4. However, Drew is correct, the bolt on backing plates work very well. Used them a few years ago.

If you are interested in selling the 91 disc backing plates to offset the cost of the bolt-on brackets , let me know, may be interested .

 

Yes, I would be interested in selling them if I cannot after all use them. PM me, and I will dig them out of my shop.

 

You can modify the drum flange to use the disc mounting plates, it just takes more effort than the aftermarket bolt-on mounting plates.

AndyZ28 offered the parts, but his website is currently down, and they cost as much as the no-hassle adapters from Flynbye. I'm in the same boat at the moment, NOS 91-92 backing plates, and a drum rear. Not sure which way I want to go yet.

These shots from the AndyZ28 1LE CD show what has to be modified.

 

The following 10-Bolt FAQ has a lot of info on brakes, to include the drum/disc axle interchange, master cylinders, combination valves, e-brake cables and so forth:

https://www.thirdgen.org/forums/tran...-10-bolts.html

After modifying the flanges, the following conversation write-up should prove somewhat useful:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

JamesC

 

That Fly N Bye performance is dangerous for my bank account.

For $84 USD I can get the kit for 1LE brakes, so I may sell the ones I have and go that way.

I also discovered they sell the hubs and caliper mount for 2010 Camaro SS front rotors, which with my parts store discount could be worth while.

 

Hey Kevman, I am local to you and have a lathe and bridgeport in my home shop. I can probably save you a bit from ordering from the states. Cheers!
I can make hubs etc. I have an 87 T/A myself.

 

Let me know about the factory backing plates

 

I think this is what he is talking about:

http://www.flynbye.com/catalog/i30.html