Pontiac Grand Prix Transmission HARD SHIFT

I Was Told To Start By Changing The Transmission Fluid And Have It Checked For Codes At A Transmissions Shop. Question Is, Do I Do A...

I Have Noticed For The Past Few Years That Only When I Am In Traffic That My Automatic Transmission Likes To Act Manual. If I Am In Constant...

The Car Starts To Shift Hard After It Warms Up. I'll Maybe Drive It 4 Or 5 Miles Or So And It Starts Up. The Transaxle Fluid Level Is Fine...

The Car Recently Got Another Engine From A Salvage Yard With About 60000 Miles When The Original Engine Locked Up. The Original Engine Had...

I Have A Grand Pre And Everytime I Drive It For About An Hour It All The Sudden Starts Shifting Really Hard I Have Tried To Figure It Out...