2007 987 Boxster – Tiptronic – 75,000 miles – it shifts just fine in manual mode. It shifts just fine in auto if using the buttons (it moves over to manual mode) . It will not shift from 2nd to 3rd to 4th in auto only at normal RPM’s. If I use the button to upshift to 3rd, it seems to shift OK 3rd to 4th sometimes. It will shift through all gears at 5,500 RPM when I push it but I need it to shift back in the 2,000 RPM range. Cruise Control light will come on, but will not maintain speed. I am getting no related codes or issues found using a Foxwell 510 Elite. Did a complete transmission oil and filter change after the issue began. Did a battery disconnect. Checked all related fuses. No change. Anyone have any experience with this?