Will not switch into overdrive

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. What kind of testing and monitoring of component operation has been performed? I appreciate you have replaced multiple parts, but without testing, no part really needs to be replaced. It takes testing and confirmation of failure of a component to move to replace it - and this is because sometimes replacing a perfectly good component can result in negative effects. I would be looking at shift solenoid operation and commands given to see what happens when conditions are correct for overdrive to engage. This will tell you much. Reach out to a shop near you if needed for further assistance. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.