US Gears now offers a 4.09 ratio!

Car Guy said:

http://www.fordnxt.com/news/us-gear-offers-three-new-super-8-8-gear-ratios-for-s550s/

Has anyone figured the part number for '15-'17 GT six speed cars? Manual transmission cars have a Super8.8 axle while auto trans do not.

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Car Guy said:

http://www.fordnxt.com/news/us-gear-offers-three-new-super-8-8-gear-ratios-for-s550s/

Manual transmission cars have a Super8.8 axle while auto trans do not.

Click to expand...

EXP Jawa said:

Just pointing out - all S550 models have the Super 8.8, not just the manual transmission cars. The linked article says as much. The difference between the A/T & M/T is carrier construction (aluminum vs iron), not basic axle design. The new gear ratios fit any of them directly, except assemblies with the 3.15 ratio. Those require a diff swap to accommodate the gear change.

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Car Guy said:

Big thank you for this important clarification! I can't seem to find a set of these 4.09 gears...any ideas? ( looked at FRPP and US Gear- not listed).

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whatsup62 said:

http://www.jegs.com/i/US-Gear/963/07-888411-15/10002/-1 regular series

https://www.summitracing.com/parts/ugr-0788841115is lightning series

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Car Guy said:

http://www.fordnxt.com/news/us-gear-offers-three-new-super-8-8-gear-ratios-for-s550s/

Has anyone figured the part number for '15-'17 GT six speed cars? Manual transmission cars have a Super8.8 axle while auto trans do not.

Click to expand...