Ring and pinion swap

[Ranebowcyxx]

Anyone do this on Ecoboost?
If so, which gear company did you go with? I'm thinking of sticking with Ford, I have had good luck with Yukon and Richmond in the past. I'm think 3.
73

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[Radiation Joe]

Are you manual or At-10? In the case of the manual, the 3.73 will be an improvement, but I'd recommend a 4.09. On the auto, you won't notice any difference with a 3.73. With 10 gears in the auto, I wouldn't change the final drive. With the old 3 and 4 speed autos, a gear change made a difference. Not with a 10 speed.

I have a 2017 Ecoboost manual and I think the Richmond 3.91 or 4.09 would be my best choice.

 

[Ranebowcyxx]

Good feedback. I have the A10, I guess I was stuck on 3.73 because my last (2006) Mustang I was using the same gear not considering the 5 spd auto from the last car only one OD gear. Decisions Decisions.

 

[Optimum Performance]

Anyone do this on Ecoboost?
If so, which gear company did you go with? I'm thinking of sticking with Ford, I have had good luck with Yukon and Richmond in the past. I'm think 3.
73

What is the original ratio in your car? If it is 3.15 you need to change the differential as well. Stick with the Ford Sets.

 

[Vicr]

This should probably be moved to "Transmission and Drivetrain".

 

[Ranebowcyxx]

What is the original ratio in your car? If it is 3.15 you need to change the differential as well. Stick with the Ford Sets.

If I recall it will take a 4 series to use 3.73s

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