4.30 Rear Diff Common?

Until recently, I thought I had a 4.10 rear diff like most do. I checked the spec build available on toyota.com on the truck and it says 4.30 for the rear diff. Is this common or is this a mistake on the Toyota website?

What is recommended for this diff in gear oil weight as I have searched on here and nothing comes up under the 4.30.

 

I think you could get a 5.7 with 4.10's in the early years if you ordered it without the tow package. Could be wrong about that, but I recall the pattern being: 5.7 w/tow - 4.30; 5.7 w/o tow - 4.10; 4.6 w/tow - 4.10; 4.6 w/o tow - 3.91.

But it's rare to find a 5.7 without the tow package, and I believe around either the mid-cycle refresh in '14, or phasing out the 4.7 in '11, pretty much all 5.7's get 4.30 gears.

 

Yes, I have a 15' 5.7L. Thanks. For some reason I thought the normal was 4.10.

 

Thank you

 

No problem. Forgot to answer your second question: 75w90 is most often recommended for the front and rear diffs (there is some debate about 75w90 vs straight 75w oil for the transfer case for ‘14 and newer). I use a good quality synthetic and change it per the recommended schedule in the manual.

 

So, 75W140 shouldn't be an option in this diff? In the world of Fords, they went from 85w90 for fuel efficiency purposes and most mechanics recommend 75W140 in those diffs now, as it used to be. I am actually about to do an oil change in the T250 and going to Ford 75W140 with friction modifier in it. Wondering if Toyota was strong-armed into this also by the EPA overlords to do the same.

Valvoline flexfill 75w90 I was looking at for the truck but saw that 75w140 was also available.

 

I don't think you would ruin the diff running either weight. I've asked independent oil blenders/distributors for their opinion on proper oil for the tundra differential - every one that I've asked has recommended 75w90. Many of them run it in their 2500 pickups instead of 75w140. My truck isn't light; it's always hauling stuff in the bed and often hitched up to a trailer. Knowing that, they still recommend 75w90 and see no benefit to running a heavier oil. I'll be at 200k next week with original bearings throughout. But that's just my experience with 75w90.

 

I run 85w140 Lucas per ECGS recommendation. Been 20k miles without any issues. Ran the same in my GX460 on 35s.

 

Do you offroad? I haul firewood about 7-8 times a year, but also load up with wood chips, and soil(occasionally). Would this push me into severe duty? I plan to move rurally as I currently live in a huge cshitty, and will probably tow and haul more when I get a trailer.
I plan to also get a GX460 as a family truck.

 

Nothing too crazy but I do enjoy logging roads, beach driving and snow runs. Maybe a few times in the summer I’ll hit some rocky trails.

I also tow heavy and run 37s so needed something that clings to the gears better so that’s why I went with ecgs.