Normal/Performance Switch
 

Okay Guys, what the heck it the difference for the Normal/Performance Switch on the automatic transmissions? I've tried this thing in both positions on mine and can't tell a bit of difference. Should I also turn off the traction control when switching it? I had one of these in the SOHC SC1 that I had and I couldn't tell any difference in it either. Is is so subtle that I should just watch the tach for shift points?

I think it is like the tow haul switch in pickups it reprograms the shift points in the trans for a little more power

Paul's got it right ..... +1

Okay, thanks guys. Does it effect your mpg very much? If y'all don't know or aren't sure, I think I'll just drive it in performance mode for the next tank of gas and compare the mpg. Of course, trips and mph and things will not be identical, based on where I have to go and what I do, but my driving habits will still be the same, so it should be an interesting comparison.

Yes in can affect gas mileage, it raises the shift points to a higher rpm.

Thank you, sir. I will check it both ways on this tank and the next tank and compare numbers.

On mine, a 94 SC2, if I am not mistaken the transmission is a 4 speed automatic.
In performance it starts out in low. In economy it starts out in 2nd.
In performance the up shifts stay in lower gears longer. in economy it short shifts.
At least that is how mine seems to work and I frankly enjoy the options.

This is also typical of transmissions with a D1 and D2 option and the old Fordomatics would always start out in 2nd unless you selected L for low gear. This is the 3 speed ones.
Ford did for awhile manufacture a 2 speed unit akin to the Chevy Power Glide which was 2 speed. Unit. As did Chrysler in the late 50's.
Actually automatics had a variety of go forward options over the years.
Buick's Dynaflo had forward and reverse and depended on torque converter slippage.
Packard's Ultramatic, the only independent designed automatic was a 2 speed with a lock up torque converter. And the list goes on.