Assist Overrides on specific vehicles

[ZeldaACFan17]

I've been making a mod for sequential gearboxes in all the Reiza cars, but some of them (Direct Drive Karts) have assists overridden... I added a 6 speed sequential gearbox to the direct drive karts, but when I go into the garage I see the auto shift mode is locked to "Upshifts" and I have no idea how to remove this override...