When shift solenoids A and B wear out or fail electrically, the automatic transmission loses the ability to command clean upshifts between first, second and third gear, and the result shows up as harsh bangs, long flares or a transmission stuck in one range. This two-piece set addresses exactly that failure point by replacing both the 1-2 and the 2-3 shift solenoids together, so the repair covers the full shift sequence in one transaction instead of chasing the problem one solenoid at a time.The set is built for the 4L60E, 4L65E and 4L70E family from 1994 and up. Each solenoid is OEM specification, meaning the resistance, port sizing and connector fit match what the valve body expects. Installing one solenoid that is out of spec while the other is correct can still produce erratic shift behavior, which is the practical reason to replace both A and B at the same time.The box contains two pieces and nothing else: one 1-2 shift solenoid and one 2-3 shift solenoid. There are no friction discs, no steels, no filter, no gasket set and no additional seals in this package. Technicians who are doing a full overhaul will need those components sourced separately. This set is intended specifically for the solenoid swap, whether that is a stand-alone repair or part of a larger job.Before placing the order, read the transmission identification tag on the unit and confirm it carries the 4L60E, 4L65E or 4L70E designation, and that the application year is 1994 or later. The set ships at 1 lb, so it travels light, but the fit confirmation is the step that matters most. Restores clean 1-2 and 2-3 shift commands, preventing delayed, harsh or missed gear changes caused by worn or failed shift solenoids A and B. This set does NOT include filter, gaskets, seals, friction discs, steels or any other rebuild components. Verify what else your job requires before ordering. Two OEM-specification shift solenoids built to the same electrical and mechanical tolerances as the original units, covering both the A and B positions in a single order. Set contains exactly 2 pieces: one 1-2 shift solenoid and one 2-3 shift solenoid, both OEM type. Total package weight is 1 lb. Before purchasing, confirm the transmission code on the unit itself is 4L60E, 4L65E or 4L70E and that the vehicle model year falls within the 1994-and-up application range.