Changed the differential fluid of my dedicated Lemons track car, after finally being able to crack open the fill and drain plug, by lifting the car with a floor jack, put a breaker bar in place resting against the floor, and then dropping the car fast and hard on the ground….what rednecks like me do when we don’t have the proper impact air wrench, heh heh.
I don’t think anyone ever changed the differential fluid for the past 26 years and 153k miles. It came out almost black.