90w or 75w-90?

[Desert4Runner]

I searched for the answer to my question and didn't find it. It's hard to imagine this hasn't been discussed, so I apologize in advance if it has and I missed it.

I have an '07 4 wheel drive V8. The owner's manual says to use straight 90w gear oil in the front and rear diffs and to use 75w-90 in the transfer case. The multiweight oil was easy to find, but I can't find the straight weight 90w. I have two questions:

1) Does it make a difference if I use the multiweight in the fr/rear diffs?

2) If it does, where do you folks get the straight 90w?
​

Thanks for any info.

 

[GMZ]

I searched for the answer to my question and didn't find it. It's hard to imagine this hasn't been discussed, so I apologize in advance if it has and I missed it.

I have an '07 4 wheel drive V8. The owner's manual says to use straight 90w gear oil in the front and rear diffs and to use 75w-90 in the transfer case. The multiweight oil was easy to find, but I can't find the straight weight 90w. I have two questions:

1) Does it make a difference if I use the multiweight in the fr/rear diffs?

2) If it does, where do you folks get the straight 90w?
​

Thanks for any info.

The consensus is that 75W-90 is gtg. I myself put in Amsoil Sever Gear 75W-90 in all 3 diffs on both of my 4x4 4R's.

 

[CJ3Flyr]

The consensus is that 75W-90 is gtg. I myself put in Amsoil Sever Gear 75W-90 in all 3 diffs on both of my 4x4 4R's.

x2:cheers:

 

[SportRunner]

x3....:thumb3:

 

[xnapajx]

Here is some more information on 90w diff oil from s2000 forum. I also need to change diff & tranfer case oil in my 05 4Runner. But i'll probably just get Mobile 1 75-90W as it is easier to find.

http://www.s2ki.com/forums/index.php?showtopic=185775&st=0

 

[Desert4Runner]

I went ahead and put in Mobil 1 75W 90, so we'll see what happens. No doubt, it will be just fine.