Like I said, if you've got the time, then get new gaskets. But many people here have re-used the gaskets, some several times, without any problems. They're nothing like the crusher washer on the oil pan drain plug. It's basically a heavy duty washer that you'd actually have to put some serious effort into bending.

EDIT: Found the part number: 11026-4N200
https://g35driver.com/forums/4650424-post35.html

 

thanks again.

 

If I don't have the time/experience, how much should I expect to pay to have the dealer replace the fluids for the F/R differential and transfer case? Thanks.