BG Transmission Power Flush System is a powerful transmission service machine. It exchanges 100% of the transmission fluid entirely. This is one of the best services you can do to your transmission yet it is the most neglected. So many transmissions fail simply because the fluid was never changed. Older methods of transmission flushes, such as a pan drop, do not remove all of the old fluid. At best it may only remove 50% of the transmission fluid. This is important because the old fluid will contaminate the new fluid, causing it to fail faster than completely flushed automatic transmission fluid. Symptoms you may have from a poorly maintained transmission are. Slipping, hard shifting, chattering noise, and leakage are a few. Don't wait till your transmission to fail to service it. Just like you change your motor oil you should change your transmission oil at its recommended intervals.