Ford Performance not offering the 4.09 gears for the 2024. Why?

[ThreePedalPlow]

Agreed, 3.55 to 3.73 is minimal. Thats a 5% bump.
You could get close to that with slightly shorter tires.

4.09 gives you 15% extra.
THats 40 to 45lbs at 2500rpm
60lbs at peak 400 rpm


Old S550 procal would allow 4.09 gears.
I'm guessing once the S650 procal is out, 4.09 will be offered as well.

I assume you are talking about lbs of torque. What did you mean by "60lbs at peak 400 rpm"?

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[RBGT]

I assume you are talking about lbs of torque. What did you mean by "60lbs at peak 400 rpm"?

Sorry, 60lbs at peak torque.

 

[ThreePedalPlow]

What RPM do you guys think you would be running on the interstate traveling around 70 mph when you are running a 4.09 gear in a Getrag? I'm wondering if it would be obnoxious on the highway.

 

[RBGT]

What RPM do you guys think you would be running on the interstate traveling around 70 mph when you are running a 4.09 gear in a Getrag? I'm wondering if it would be obnoxious on the highway.

should be 15% higher than 3.55.

So if its say 2500 with the 3.55, it will be 2875.

 

[RBGT]

What RPM do you guys think you would be running on the interstate traveling around 70 mph when you are running a 4.09 gear in a Getrag? I'm wondering if it would be obnoxious on the highway.

From another forum:

" 'll use myself as an example: At 70mph with a 3.55 rear gear set, I am turning 2202 RPM "

so with 4.09 it will be 2530 rpm

 

[RBGT]

Given the MT82 was a 6th gear ratio of 0.622, thats very low.
Meaning highway RPMs will be nice and low.
Should be fine with 4.09 gears.

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