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: https://youtu.be/giV8ySI1Cz8 ***More 4L60E Videos*** Pump: https://youtu.be/gJ5CdPJoJyg PR Valve (Part 1): https://youtu.be/ELhJlZridIY PR Valve (Part 2): https://youtu.be/dJlUec91kgY PR Valve (Part 3): https://youtu.be/PY1trZeLqTM AFL Valve (Part 1): https://youtu.be/LqBkdegPjNk 1-2 + 2-3 Shift Solenoid (Part 1): https://youtu.be/FaChWmcsAgI Planetary Gearset: https://youtu.be/QjT0CUG73YM Power Flow (OD Gears): https://youtu.be/IfOqbTqKubE Power Flow: (Manual Gears): https://youtu.be/6kfAuXJFYFE Teardown: https://youtu.be/pcTBrf4GQh4 Teardown Time-Lapse: https://youtu.be/WNx5o3RHM_0 Output Shaft Swap (2WD to 4WD Conversion): https://youtu.be/4IDfs0UMne0 RESOURCES: 1) 4L60E Tools: (Paid Links) Electrical Harness Case Connector Tool: https://amzn.to/3uJeqXZ Torx Plus Bit/Socket: https://amzn.to/3l4Ad8X Teflon Seal Ring Installer (Sizing Tool Kit): https://amzn.to/3BWwQZP Shift Shaft Seal Puller/Installer: https://amzn.to/2Oa2sat Universal Transmission Pump Puller: https://amzn.to/3t7uDFH 3-Ton Arbor Press (12 inch working height): https://amzn.to/2Reqmyx Lip Seal Installer: https://amzn.to/2Gz4KI5 Lip Seal Installer (Huge Time/Headache Saver): https://amzn.to/2MxUC8O Pump Alignment Band: https://amzn.to/2J13lNF Universal Clutch Spring Compressor (Use in trans & drums): https://amzn.to/2YHQGn6 Adjustable Clutch Spring Compressor (Use with shop press): https://amzn.to/2W2DAQs Universal Bushing Driver Kit (Larger Sizes): https://amzn.to/2M1aQHn Universal Bushing Driver Kit (Smaller Sizes): https://amzn.to/2Et1ON3 Snap Ring Pliers (Clutch Spring Compressor Snap Ring): https://amzn.to/2GwwixP Snap Ring Plier Set (Pump Circlip Snap Rings): https://amzn.to/2IUxpdu 2) 4L60E Parts: (Paid Links) Over-Sized Pressure Regulator Valve: https://amzn.to/3CbAHm1 0.500" Boost Valve: https://amzn.to/3Af6ccP Bell Housing Bolts (Torx): https://ebay.us/vZLBiN Pan Gasket (Fiber): https://amzn.to/2N4Ykba Filter: Shallow Pan: https://amzn.to/3t7AtH7 Deep Pan: https://amzn.to/30sVoYL Output Shafts: Heavy-Duty: 2WD: https://amzn.to/3dxjw4q. 4WD: https://amzn.to/2NRN9m0 Standard-Duty: 2WD: https://amzn.to/3pKoptk 4WD: https://ebay.us/cDwiJt Rebuild Kit: 93-03: https://amzn.to/3chb3Qw 04-Up: https://amzn.to/2OaYJcL Molded Pistons: https://amzn.to/3chRbNb 2-4 Band: Stock: https://amzn.to/3rvW2ke Hi-Perf: https://amzn.to/2N3JRw2 Sun Shell: Upgrade: https://amzn.to/3cbPmRK Heavy-Duty: https://amzn.to/3rzAEuv 3) Safety-Wear: 😷 (Paid Links) A) Comfortable Safety Glasses: https://amzn.to/2JguhZN B) Work Boots: https://amzn.to/2GD9eP7 C) Nitrile Gloves: https://amzn.to/2Y6XwSN 4) Tools: 🔧 (Paid Links) Craftsman 230-Piece Tool Set: https://amzn.to/2L0AtWv 1/2 Impact Gun (Ingersoll Rand): https://amzn.to/30zUuHA 3/8 Impact Gun (Ingersoll Rand): https://amzn.to/30l5gpm Air Compressor (60 Gallon)(Ingersoll Rand): https://amzn.to/2QkisXt 1/4 Air Hose (Flexzilla): https://amzn.to/2QjJQ7W Pocket Screwdriver: https://amzn.to/2OdoR44 Spring-Loaded Center Punch: https://amzn.to/304x3dx Yellow Paint Pen: https://amzn.to/2LZRQWq Brass Punch: https://amzn.to/2QlSAe1 Bench Vice (Craftsman): https://amzn.to/2LFnKbZ 5) Shop Supplies: ✏️ (Paid Links) Thread Locker: Medium: https://amzn.to/2YLtmFk Heavy: Brake Parts Cleaner: https://amzn.to/2HxQ1Pz DISCLOSURE: 🕵 Links provided are affiliated links with the associated websites. While there is no extra cost to the purchaser, a small portion of the sale goes to support this YouTube channel.