Axles are going to be off shortly to address leaking cv boots. Is is a good idea to replace the rear final drive seal? Does the transmission fluid need to be drained to replace the seal?

Thanks,
Tod

Unless they are leaking, I would leave them alone. You will need to drain the oil. This is a good time to do an oil change.

Yes. Not completely. Make sure the section of axle shaft that contacts the seal is clean & corrosion free.

You don't have to drain the trans. If you fear leaks, jack one side up higher than the other, do that side, then do the same for the other one. Make sure the stub isn't pitted, clean it well. Oil the outside of the seal, as well as the inside, and install it. If they're not leaking, I wouldn't bother the change them.

The Cap'n

Thanks guys. Good suggestion Capt'n with the working side raised. Thinking while I'm in there type of thing.