Fluid Level is fine, I Use Royal Purple "Max ATF", it's Never given me any Problems.
By "Between N and D" I mean, when I Shift from Neutral into Drive.
I had the CEL come on a Couple of times, I pulled the Battery and it was gone, I bet it would come back if I were to Drive around for a bit, but since I haven't been Driving, it hasn't come on.
I believe the Problem is either the Input or Output Speed Sensors, I read in one Post that if your Speedo' isn't working then it's most likely your Output. If that's the case, does anyone have a Write-Up on how to Replace the Two?