Originally Posted by mlifxs
Something like this happened to me a couple months ago. Go to DS, it would go back to D. I could manually shift but it wouldn't stay in manual mode: it would go back to D shortly after the shift.
I found the following DIY on this website:
upon investigating, I had a broken wire as suggested in the DIY. Patched the wire, problem solved.
Anyway, not sure if this is your issue but perhaps something you can explore before paying big money for a repair. Good luck.
Had the same issue this fixed it! Just a little time consuming pretty easy otherwise!