B&M Trick Shift Performance Automatic Transmssion Fluid (ATF) is the easiest way to firm up your transmission's shift performance. Not an additive, this safe and effective blend of extreme pressure agents and foam inhibitors will provide a noticeable shift improvement when you replace your existing automatic transmission fluid with Trick Shift. Ideal for street use and high load applications such as racing, off-road, towing and heavy duty fleet use. Trick Shift may be mixed with other types of ATF but works best by itself. With B&M Trick Shift you can literally ''pour in performance''. Meets or exceeds Type F requirements.