Ford E350 Rear differential fluid change

I wanted to get the fluid changed and had been procrastinating. A friend from the Class C forum encouraged me to 1. use a suction device, and 2. refill with 75W-140 Full Synthetic. Since the magnetic plug was clean, the axle was full, and was quiet, I just jumped in and did it. It wasn't just that I didn't want to take the Track Bar off to even get access to the cover bolts... I didn't have a good reason to do it. Between the fuel tank, the exhaust, the shock, the sway bar, storage compartment and mud flap, it was challenging enough to get the quart bottles in place to refill. Glad I didn't have more to do than I went through on this job.