1Vehicle Fitment: Transmission servo piston kit is replacement for Chevy 2+4 Band, replacement for Hummer H3 H3T V8 5.3L 2006?2010, replacement for Rainer L6 4.2L V8 5.3L 2004?2007, etc. 2Oem Number: Servo piston kit replace part number are K77895, 700R4, 4L60, 4L60E. Please double check the Oem part number of your item before ordering. 3Powerful Function: Excellent servo piston kit for fixing flare shift problem and more seamless gear changes, giving you reliable use performance. 4Improved Efficiency: A full range of transmission servo piston parts significantly improves the vehicle's shift efficiency and makes driving more enjoyable. 5High Performance: The upgraded design and professional performance can significantly extend the life of the transmission, practical and stable.