Shift points (automatic transmission - shifts seem late)

[Thymeclock]

"Consumer acceptance" is the usual reason. (Driveability would be the reason, I would guess.)

Make an automatic upshift "early" and GM would end up with 100% of auto reviewers (and some owners) complaining about the lack of power in the upper gears and the frequent downshifts needed to accelerate hard.

Absolutely. If the car were geared for economy, most American drivers would say that the car can't get out of its own way.

A "Power/Economy" button/programming would have solved the problem though.

I have that option on my old Galant. But that car has more than enough power even in economy mode, so I never need to activate the 'power' button.

I am wondering about those tuner companies that do modifications to alter the shift points, however. I assume that their goal is to raise the shift points so that the car will have more power. But some of us want to lower the shift points so we can get better fuel economy. Would their programming mods make the latter possible?