Trans and gear oil?

[Redland1]

What weight should I be using in my 13 speed Eaton and in the rears?

[Rawze]

My personal opinion is that 50-wt tranny oil is too thin unless you live in northern canada. I have use 80/90 in mine its whole life.
here were the results at 1.4 million miles: http://rawze.com/forums/showthread.php?t...6#pid52116

[Waterloo]

80/90 here too, no issues, runs and shifts smooth. Just take it easy on the cold mornings until she warms up and all is fine.

[Redland1]

Will 75w90 work?

[Waterloo]

It will work, I would not hesitate using it, especially if you have a bunch laying around.

[Redland1]

With GL-5?

[Waterloo]

(04-24-2021 )Redland1 Wrote:  With GL-5?

Do you have emissions on the truck? No emissions, use what you have. As far as the SCR system, if that is operational, I want to say use GL-5, seeing as the Sta-Lube we use in the 871 is GL4 rated. Honestly, I don't think it really matters as long as you do not do extended oil changes. The issue was the soot in regards to the SCR can... I would not be concerned as long as you keep up with the general maintenance and EGR Tuneups.

[Redland1]

(04-24-2021 )Waterloo Wrote:  

(04-24-2021 )Redland1 Wrote:  With GL-5?

Do you have emissions on the truck? No emissions, use what you have. As far as the SCR system, if that is operational, I want to say use GL-5, seeing as the Sta-Lube we use in the 871 is GL4 rated. Honestly, I don't think it really matters as long as you do not do extended oil changes. The issue was the soot in regards to the SCR can... I would not be concerned as long as you keep up with the general maintenance and EGR Tuneups.

It’s an 870 with the EGR still operational (for now).

[tree98]

He's using it in his trans Loo, not in the engine.