I use a Bluetooth thingy in my headphone aux on the stocker.
That's what i ended up with was the 5 position switch. Hp on the tcm too. Any revmax approved tune should work. If yours has had a valve body, which I assume it definitely has if it has over 100k mile on the stocker ( the solenoid switch valve wears the bore out on the early non anodized vb). It should last pretty decent until it shits a pin out of the planetary, flips the L/R sprag in it's race or burns the od pack. Other than those things and a few snap ring/ retainer issues they really aren't all that bad of a transmission!