It fixed the bearing noise I had when it was in neutral and the clutch was not pressed in. The most work is removing the transmission from the vehicle. I think 3 or 4 of the bearings are easily accessible when you split the case. I wasn't motivated or confident in my skills to disassemble it further.
I did have other whines that I have now determined to be the rear pinion bearing. I replaced the third member and all axle bearings and seals while I was at it. It's smooth and quiet now.
