He's right. But technically you can't go WOT in Overdrive. if you do the tranny will always downshift.
OD and D are the same basic thing in terms of shift patterns. The only difference is when the shifter is in D you only use 3 gears of the tranny. When the shifter is in OD, you use all 4 gears. There is no difference in shift patterns. You car will not be any faster in D than in OD.
But OD is weak, so generally drive the car around with the shifter in D. When you get up on the highway, get to cruise RPM and then shift to OD and cruise. WHen you are slowing down, downshift to D.
The 1 position is a little tricky. From a dead stop it will start in first gear (same as D) but it will not upshift to 2nd or third gear. When at speed, the 1 positon will automatically downshift the tranny 1 gear. For example, driving 60MPH in D. You are in 3rd gear at say 2000RPM. You pull the shifter to 1 and it will downshift to second gear. If you let the car decelerate in gear withthe shifter still in 1, the tranny will automatically downshift to first gear when it gets slow enough.
There is no way to hold 2 unless you do the 1-D-1 shuffle at WOT or you get up to crusing speed in 3rd gear and pull the shifter to 1 and do not slow down far enough to downshift into first gear.
Generally, when the shifter is in 1, the OD band is engauged somewhat. If you do it too much, you will burn it out.
So, just a recap.
Drive in D, cruise on highway in OD
try to ease off the driving in 1