4.09 gears for the Mach1...think its doable without software?

[Dave2013M3]

I know it used to be able to tuned with Forscan, not sure on the late 2020 and 2021s.

Sponsored

 

[Dave2013M3]

Ttt...no one?

 

[stageron]

Ttt...no one?

I did read somewhere on here that someone with a Bullitt tried 409 gears and it really messed with the electrical system. Car was throwing codes, messed up a lot of things. I'll see if I can find the thread.

 

[stageron]

I did read somewhere on here that someone with a Bullitt tried 409 gears and it really messed with the electrical system. Car was throwing codes, messed up a lot of things. I'll see if I can find the thread.

My mistake, it was 488 gears, here's the thread

https://www.mustang6g.com/forums/th...resolved-steeda-tune-fixed-all-issues.146709/

 

[Superspirit]

I believe 19my up will require a tune for 4.09s.
There are several threads about the problems that arrive if you change without a tune.

 

[ctandc72]

'19 and up need a tune modification, depending on the max gear setting in the tune (not accessible via FORSCAN).

 

[Mikepol2]

Just talked to Ford Performance, figured that by now they'd have an answer on this... they said they aren't supporting 4.09's in the Mach 1 because it's a "niche" vehicle. They said you'll need an aftermarket tune and mentioned SCT or HP Tuners. Told them I have an SCT BDX and could they just email me a file just for the 4.09's, but they said no.

 

[Dave2013M3]

Just talked to Ford Performance, figured that by now they'd have an answer on this... they said they aren't supporting 4.09's in the Mach 1 because it's a "niche" vehicle. They said you'll need an aftermarket tune and mentioned SCT or HP Tuners. Told them I have an SCT BDX and could they just email me a file just for the 4.09's, but they said no.

Thanks for the effort bro

Sponsored