Does anyone know if there is a way to adjust at what RPM the auto tranny shifts gears? I feel that right now it shifts at approximately 3000 RPM but I want it to shift closer to 4000 - 5000 RPM.

Other than manually going from D1 to D4, is there a way to trick the TCU to shift at a higher RPM?

Thank you.

The reason I'm asking for this is because I recently installed an Apexi VAFC II and would like to set the Vtech above 3000 RPM but my car shifts prior to that.

I believe you have a transhift cable on yours, it runs from the the throttle bellcrank down to the tranny case, you'll see it if it's there...

Up on the throttle plate end there is an adjustment provision, a double locknut and screw kinda thing I think. Changing the cable length will delay upshifts and make it hold longer, the transhift cable is how it senses the relationship between throttle application, load and vehicle speed to decide if it needs to hold onto a lower gear longer in order not to lug the motor...

Make very small (no more than one turn) adjustments and see what you get, keep track of exactly what you've done so if it gets all messed up you can return it. Don't rely on memory, you WILL forget. Trust me. There is a specific proper setting for cable adjustment if it really gets outta control, you can always fall back on that...I just don't know offhand what it is on yours...

That's a pretty big change in upshift RPM detent, I don't know how successful it's gonna be, but you can try it. I have a feeling you might end up with the operation you want on hard throttle apps, but end up with goofy shifting when you are driving casually.

Hopefully someone has a better idea. I know there is inline transhift modulators you can buy to modify shift patterns too...they modify the controller's signals to the shift solenoids, you can set delay, etc. Probably pricey.