4L60E: 1-2 Shift Valve + 1-2 Shift Solenoid (Part 1) Basic Operation

Learn how the 4L60E 1-2 Shift Valve works (and the 1-2 shift solenoid)(Shift Solenoid A). When there are problems with this shift valve and solenoid, it leads to number of 4L60E problems; 1). 4L60E no 1st gear. 2). 4L60E no 2nd gear. 3). 4L60E no 3rd gear. 4). 4L60E no 4th gear. 4). Etc. Before we can address the problem areas, it's important to first understand the basics of how a healthy system works. Buckle up! Note: the 4L60E 1-2 Shift Solenoid is also known as Shift Solenoid A. Help this Channel Grow: ***More 4L60E Videos*** Pump: PR Valve (Part 1): PR Valve (Part 2): PR Valve (Part 3): AFL Valve (Part 1): 1-2 2-3 Shift Solenoid (Part 1): Planetary Gearset: Power Flow (OD Gears): https://youtu