Thing is, each axle is removed separately. There is no "time savings" by doing both, well except for the fact that the car is in the shop just once. If the CV booties are old & worn, handling the axles may cause them to fail right away or shortly thereafter. Old boots are fragile. I've learned that lesson the hard way! Ching-Ho, is this something you could do yourself? The parts are cheap, and it's a pretty straigh-forward job.