Best differential fluid for my new Tundra?

I have an '06 Tundra that I bought new that now has about 9k miles on
it. Great truck, love it. I intend to change the differential fluids
at 10k miles and am planning on switching to synthetic. I'm already
using Mobil One engine oil. Anyway, is there a clear-cut "best"
sythetic gear oil or should I just get some Mobil One and not worry?

-jeff

On 3 Oct 2006 22:01:53 -0700, "Jeff Olsen" <handywired@earthlink.net>
wrote:
[color=blue]
>I have an '06 Tundra that I bought new that now has about 9k miles on
>it. Great truck, love it. I intend to change the differential fluids
>at 10k miles and am planning on switching to synthetic. I'm already
>using Mobil One engine oil. Anyway, is there a clear-cut "best"
>sythetic gear oil or should I just get some Mobil One and not worry?
>
>-jeff[/color]
I put Royal Purple Max Gear 75W90 in all the boxes on my 2000 3500
4x4, I would have used Mobil 1, but it wasn't rated high enough for
the load.

Jeff Olsen wrote:[color=blue]
> I have an '06 Tundra that I bought new that now has about 9k miles on
> it. Great truck, love it. I intend to change the differential fluids
> at 10k miles and am planning on switching to synthetic. I'm already
> using Mobil One engine oil. Anyway, is there a clear-cut "best"
> sythetic gear oil or should I just get some Mobil One and not worry?
>
> -jeff
>[/color]
Mobil 1 gear oil is excellent as are many others. There are no load
ratings published for gear oils except that they meet the GL-5 spec
for hypoid gearing and that the viscosity is suitable. Royal Purple
is good, but the company is terrible about distributing objective
info about their products...find a product data sheet???


Ken