I will not say immediately, but I wouldn’t be making any long hauls. People drive all over the place with leaking axle seals and never notice or ever replace them. It’s the brakes I’d worry about the most and since you’ll be pulling the axles I’d plan on putting new e-brake shoes, brake pads and rotors on it while they are off. Replacement is not hard nor are they expensive for a DANA 44, it’s a matter of having someone with a press to press the bearings back on. I’ve done them on multiple Jeeps. Personally I think the smell of the diff fluid is my least favorite part!!!