Synthetics at 60k maintenance

[mcseth2]

I will probably switch to full synthetics on my 60k (2006 4wd) service for transfer case, differential, and transmission. I still use Dino oil in the crankcase, but may switch over then as well.

Does anyone have a recomendation on viscosity for each of these? I will probably use Mobil one or AMSOIL for Brands.

Thanks for the recomendations if you can give them.

[Andy4]

the differential may already have synthetic from toyota ('04 did). if you change diff and have a posi rear, i've read that you will need an additive.
I use 5w30 mobil 1, and changed transfer case to syn before the winter and could feel the difference starting out cold.
not sure if all greases are syn., but syn should hold up better in ball joints and universals in drive shaft. something to look in to.
transmission fluid is already syn (right ?).

[mcseth2]

Now thinking of just staying with regular oils. Seems that there is no real benefit as long as you maintain the vehicle as recomended. I am overthinking this whole thing.

[JBH1989]

Oh there is a benefit. Synthetic handles heat much better than conventional oil, so if you do a lot of stop and go or high speed driving, the synthetic oil will not break down like dino oil will.