Time to replace my tranny, xfer case and diff lubes.

I'm currently using Redline MT-90 in my tranny, and Redline 75/90 gear oil in the diffs and xfer case. Is this still the way to go?

Also, what is the best online source for these lubes?

Rig is an 88 4runner w/22RE and a transplanted R151F transmission.

TIA, riverrat.