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  • BRZ and FRS Ford 8.8" Rear end swap kit - complete install guide
  • Post author
    Joel Grannas

BRZ and FRS Ford 8.8" Rear end swap kit - complete install guide


The Ford 8.8 is the strongest rear end option for the Subaru BR-Z and Scion FR-S


Grannas Racing is pleased to show you the lastest 8.8" Ford rear end swap kits available now for the Toyota 86 chassis.

These kits are comprised of The Driveshaft Shop axles, which include billet 110mm inner 8.8 stubs as well as the Grannas mounting kit for the IRS 8.8 rear. These rears come in two types in oem applications, an aluminum case and a cast iron case. The aluminum case can be found in the mustang cobra as well as lincoln mark viii, and the stronger, more rare iron case can be found in the 89-95 Ford Thunderbird.

Subaru BRZ Scion FRS Toyota GT86 Ford 8.8 IRS rear end swap kit

For drag and applications making extreme horsepower I recommend the thunderbird case (pictured above). It will run a little hotter due to less heat dissipation, but should not be really any worse than the stock rear, as they are also an iron case.

The Grannas kit uses a girdle that fits over the rear cover, which not only allows easy adaptation of the 8.8 case into the rear subframe mounting locations, but also adds strength to the case itself by reinforcing and keeping the case from spreading under heavy load. I use this same style cage on all of my kits, also available for the MKIV Toyota Supra, Lexus SC300/SC400, Lexus GS300/GS400, and Lexus IS300. It has been tested, and proven to hold lots of power.

The kit is now available for purchase. You can choose to build the rear diff yourself or have us build it for you to your specs.

If you are looking to build the rear yourself I also carry all the parts needed to do your rebuild, like the Truetrac LSD, ring & pinion gears, and master rebuild kits for both cobra/thunderbird cases and explorer cases.

Let me know if you have questions or need recommendations on a gear ratio for your setup. I would be happy to help you get you with the most ideal combination possible. Use email through my contact form, email is my preferred method of contact as I am normally working on many projects at once.

Here is the youtube video of the complete install: 

  • Post author
    Joel Grannas