Review on 🔧 Dorman 600-404 4WD Actuator for Jeep Models with Enhanced Compatibility by Jared Poinson

My QD2 Jeep WK rear differential was shaking in the cold, I changed the oil and additive first and no luck. I ordered this and upon removing the old one found it stuck in the closed position. Upon further investigation, this is a common fault with these actuators. Reinstalled and the problem was gone and never came back. For testing I put it on 4LO which locks the front and rear differentials and took a few tight turns, they locked and unlocked as expected.