Drivetrain Super 8.8 ring and pinion

I Bleed Ford Blue said:

I read somewhere about a month ago that there is aftermarket gears for the super 8.8 now in 3.89, 4.10, 4.30, and 4.56, along with the factory ratios

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Hoytster said:

To my knowledge the "Super 8.8" only started coming on the 2015+ S550 cars. The IRS housing that was in the 04' and prior cars is a standard dimension 8.8 and not the super 8.8. The ring, pinion, and differential are different between these two housings and are not interchangeable.

The difference in the 3.15 geared super 8.8 rear end and the higher gear ratio super 8.8 rear ends has to do with the differential itself. To run the 3.15 gear in a car that came with a higher gear ratio you must change the differential to match the 3.15 ring and pinion. Most of the guys that I've seen do this are heavily boosted.

Here is a link to ford performance that details this in the description of one of their ring and pinions (look for the "NOTE" at the bottom of the overview). They also give the link to the differentials that will work with the 3.15 gear set in super 8.8 housing.

2015-2022 MUSTANG IRS SUPER 8.8-INCH RING AND PINION SET – 4.09 RATIO

2015-2022 MUSTANG IRS SUPER 8.8-INCH RING AND PINION SET – 4.09 RATIO|Ford Performance Parts

performanceparts.ford.com

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