Got the axles sorted. Refilled the diff/crankcase, went out for a test drive. There is a minimal amount of noise from the rear (tbh it might have made that noise before, I can't remember) and the car feels a lot more stable now. Usually I can't get hooked up until the middle of third gear, now it hooks up early into 2nd gear. Once I get my MM LCA's installed then I can start looking into wider stickier tires so I can actually put some of the car's hp to use.