90w or 80-90W for Tranny - T'case ?

[Spike Strip]

FSM calls for straight 90w in the gear boxes but I can't find 90w anywhere...

It's going into a New H55, and I'd like to use Dino for break in, then Redline MT90 after...

What are you all running? 80-90w or 75-90w? or ...?

 

[cruiser_guy]

I don't think it matters that much. If you are primarily in warm climates, like the San Fernando Valley, I'd go with the heavier of your choices.

 

[Front Range 4x4]

The shop that installed mine says 80-90W and stay with it rather than synthetic

 

[Elbert]

use the 80-90W... that's what I was told when I had the same question.

 

[Spike Strip]

Cool. Thanks!

 

[NocalFJ60]

80-90W here in both axles, transmission, and tc.

 

[cruiser_guy]

I'd like to know why he did not recommend synthetic. I think there is a slight but noticeable improvement in mileage when using synthetic.

 

[cruiser88]

I'd like to know why he did not recommend synthetic. I think there is a slight but noticeable improvement in mileage when using synthetic.

I prefer synthetic but if i am in the water alot which I am....it can get expensive.