I know I don't have an SPI, but this is more to do with shifting than with the engine anyway...
Originally Posted by Focusnewb
No matter what RPM or speed or what kind of load is on the motor, moving the lever from 1st to 2nd causes a shift to 2nd right then.
The owners manual begs to differ...
Originally Posted by Owners Manual
This position allows for second gear only.
Provides engine braking.
Use to start-up on slippery roads.
To return to D (Overdrive), move the gearshift lever into the D(Overdrive) position.
Selecting 2 (Second) at higher speeds will cause the transaxle to downshift to second gear at the appropriate vehicle speed.
Provides maximum engine braking.
Allows upshifts by moving gearshift lever.
Will not downshift into 1 (First) at high speeds; allows for 1 (First) when vehicle reaches slower speeds.
That seems to say moving the gearshift into drive from second at anytime is fine, and the transmission will decide when its ok to shift once the shifter has been moved into position.