What are the 2008 chevy impala ss transmission problems?

The most commonly reported issue with the transmission in the 2008 Chevrolet Impala SS is a failing transmission pressure control solenoid, which causes erratic and hard shifting. If this seems to be your problem (confirm with a diagnostic trouble code P0748, P0776, P0796, or P0961-P0971), the good news is that they only run between $25 and $60 to replace yourself -- a mechanic's labor will be extra. Another common problem is a hard shifting transmission caused by overheating or low transmission fluid, the latter of which typically causing the former. To mitigate against this, you'll want to ensure that you're changing out your transmission fluid every 30,000 to 60,000 miles, and checking your levels in between. Low fluid can often cause you much more expensive problems, so it's best to be vigilant.