Sorry to bring up a dead thread from a couple weeks ago.

However, I was having some annoying issue with my shifting.

When I manually shift into a lower gear I have been seeing my transmission going back into D automatically... any thoughts? I was originally thinking TCM... not sure... have to think some more. definitely going to change to the blue tops soon, but don't know if it will fix the issue...or if it is just the cold weather causing issues cause the transmission is not warmed up.