4L60E Master Solenoid Kit 5-Piece 2003-On

Five all-new solenoids for the late 4L60E, 4L65E and 4L70E, 2003 and up. The set is the EPC pressure control solenoid, the 1-2 and 2-3 shift solenoids, the TCC PWM lockup solenoid and the 3-2 downshift control solenoid. These are new units, not cleaned cores, and they use the late-style connectors the 2003-on valve body takes. Check the connector bodies against what is on your valve body before ordering - GM changed the shift solenoid terminal style partway through the 4L60E run and the early parts will not plug in.

The reason to do all five at once is that they all live under the same pan and they all age at the same rate. A 4L60E that has run 150,000 miles on original solenoids has five parts with the same hours on them sitting in the same hot fluid. Replace one, and the next one to quit puts you back under the truck with the pan off. The labor is the pan drop, not the solenoid.

What sends people here: P0748 or an erratic line pressure that makes the unit flare on one shift and bang the next (EPC), P0751 or P0756 shift solenoid performance with a stuck gear or no 4th (1-2 and 2-3), P0742 or P1870 with a shudder or no lockup at cruise (TCC PWM), and a harsh 3-2 downshift or bind coming off throttle (3-2 control). Solenoid codes on a 4L60E are usually electrical or mechanical sticking, not a worn clutch pack, so this is a fix that does not mean pulling the transmission.

On the bench: drain and drop the pan, pull the filter, unplug each solenoid at the internal harness, unbolt the retainers, and swap each one with a fresh O-ring seated square in its bore. Do not reuse the old O-rings. Reinstall the filter and a new pan gasket, torque the pan bolts in a crossing pattern, refill and set level hot in park with the engine running. Ships from the USA.