| Same issue with my 03 Monte SS I've got about 112 K miles on my car and the exact same thing just started happening. When I accelerate and expect the "passing" gear to kick in, the rpm's increase but there is a huge delay on the shift. Maybe even slippage. I noticed that during this event my check engine light comes on as well. I'm going to start by having the trans fluid and filter changed. Hoping this helps.... Please let me know if you find anything else out. |