Grannas Racing IRS Ford 8.8" Conversion kit install - IS300 BRZ FRS GT86

Kits are available for purchase on my website:
www.grannasracing.com
Also, please don't forget to subscribe to my channel for tech info and racing coverage. / @grannasracing
This video covers the differences between the 8.8" IRS cast iron and aluminum cases. What is different between the 1999-2004 Mustang Cobra / Lincoln Mark8 / Thunderbird Super Coupe case and the 2007-2010 Ford Explorer 8.8" IRS cases. It also covers the assembly and install of a Grannas Racing 8.8" IRS conversion kit for the Lexus IS300 / Subaru BRZ / Scion FRS / Toyota GT86. These kits are bolt-in and come with upgraded driveshaft shop axles, as well as a Grannas Racing built 8.8 rear end and optional driveshaft.

[@BUZDRIFT]

Very nice kit! I know how hard it can be, I've done a ford (dana) m86 into a BMW e36... Shit is hard... But successfully done. Your kit looks soooo much cleaner though.

[@mart182003]

This is an awesome kit, really expensive though.

[@akarilotube]

Kick ass! I want one.

[@fury211]

looks good, does the is300 drive shaft bolt to the 8.8 pinion?

[@s302jzget]

Joel, you have any experiences with the carbon fiber clutch packs in these lsd 8.8s? The ones Ford sells for the cobra upgrade. I have a set installed in my 8.8 but I’m starting to debate if I should keep it or go straight to truetrac. Cars not running yet.

[@alejandrolindonimer1555]

Does this kit also apply to the GS? I know the IS and GS are similar and can sometimes interchange parts.

[@Drrizzydreww]

How hard is it to put a shorten 8.8 rearend full not just diff I’m also tryna to mini tub the car to fit bigger slicks

[@ntivqeejhmoob]

I have a 1985 toyota celica GTS with irs and wanting to upgrade my diff set up. Which diff would u recommend?

[@abdulazizaldhaheri2281]

Does the cage fits the 2015 Ford Mustang case ?

[@talontsi8213]

Do you offer driveshaft for is300 with t56 to T bird 8.8 rear.

[@marineyacht]

I am yelling for help, I will love to install 8.8 in my Lexus Ls400 twin turbo. My real diff bushing don’t hold the power🤦🏻

[@2geclipsegsx]

Will this kit applies to the 7.5 irs?

[@DahkaShades]

Can it hold up to drifting

[@johnr.denickiii2401]

Great video man ! The aluminum explorer diff does fit into the is300 correct ? You said it’s tight in the video. I already have a aluminum explorer diff.... keep up the great work! 👍🏻🤘🏻

[@GrannasRacing]

No, I can’t see it fitting. The iron case is tight as it is, no headroom. Also my front mount is designed only for the smaller cases. I have a bunch of cobra/mark8 cores in stock here if you need me to build one

[@eclifton4070]

@@GrannasRacing On your site, you specifically say to use the 07-10 Aluminum case? Has something changed? Also does your Ultimate IRS work in the IS300?

[@GrannasRacing]

@@eclifton4070 The explorer, tbird, or cobra case can be used on the SUPRA/SC300/GS300 - the IS300/BRZ/FRS use the smaller footprint thunderbird or cobra case

[@eclifton4070]

Also does your Ultimate IRS work in the IS300? Planning my IS300 Sport Cross build this summer. Thanks!

[@GrannasRacing]

@@eclifton4070 no, that is a supra specific part. the subframes are different

[@j88l98irocz]

Is the front mount spacing the same on the explorer case vs the others?

[@joelgrannas5432]

No, the front mounting ear bolt pattern on the explorer case is wider.

[@rubenburgos883]

what year thunderbird rear are best? you did not mentioned in your intro. thanks,

[@GrannasRacing]

89-95

[@TrojanLube69]

I dont get it. For the is300 the spacers are not used but for the frs brz the thin grooved one is used. Why that difference?

[@vdubsterw2516]

I have an 8.8 rear axle from a ford ranger 1997 i want to swap it onto my 2004 toyota tacoma 2wd single cab and build a drag truck. What do you suggest i do for a rear end that can handle 500 hp?

[@GrannasRacing]

Truetrac are super strong and not bad price www.grannasracing.com/products/eaton-detroit-truetrac-8-8-ford-31-spline-limited-slip-differential-for-mustang-cobra-explorer-thunderbird

[@eclifton4070]

Did you forget the axle snap rings before you sealed the cover?

[@GrannasRacing]

The stubs have integrated c-clips when you slide them in they lock

[@SA-hd8mo]

@@GrannasRacing what about super 8.8 from 2015+ mustang, do you have a swap kit for it?

[@cedillo240]

do you guys sell a kit for the Datsun 240z and do you sell the cage by itself

[@GrannasRacing]

no and no

[@stonerepublictax9487]

any kits available for a datsun 510?

[@larryford8633]

Time around 8.20. Can you install 31 spline in Iron case

[@GrannasRacing]

Yes

[@BruvaJackson]

Are you using is300 or frs axles?

[@GrannasRacing]

These are not OEM. These are aftermarket axles built for my kit by The Driveshaft Shop.

[@srtwil9386]

What year Thunder bird would I need this from? Or cobra?

[@GrannasRacing]

89-97 thunderbird SC. 93-98 MK8 - both are pretty rare but search local yards. I keep cores in stock but they are only for my customers, I do not sell just a core only fully rebuilt rears

[@srtwil9386]

Grannas Racing thanks

[@Emustang89]

What axle stub seals do you use on explorer diff since seals are larger?

[@GrannasRacing]

The seals made for the explorer case...

[@Emustang89]

Grannas Racing inner diameter on both stub seals are the same on cobra and explorer diff? I thought they were different

[@GrannasRacing]

Emustang89 they make a seal specific for each case. You buy the one for the case your using

[@thomasstidham2696]

@@Emustang89 you ever figure out if cobra stubs and explorer stubs were the same ?

[@Emustang89]

@@thomasstidham2696 yes I had to use a pressed in sleeve.

[@carwowsa]

Is this LSD?

[@ooodang180]

You might know my answer. My buddy is giving me a brz diff without the casing. I currently have an is300 non lsd. Can I drop his diff in my is300 case?

[@AmirAbdullah]

How much ? IS300 , 2001.

[@GrannasRacing]

Amir Abdullah you can price it out on my website with the options you need here: www.grannasracing.com/collections/differentials-rear-ends/products/ford-8-8-rear-end-swap-kit-for-lexus-is300