Gear oil comnparision

[buck91]

Reading the recent thread about Mobil gear oil got me thinking... I'm a short 30,000 miles away from my self-scheduled "early" dif/transfer/trans fluids change (most are factory spec'd at 150k I'm planning on going for 100k change). What is the difference between some of the higher-mid range gear oils out there? Specifically off the top of my head I would be looking at the following in 75w90 for the front and 74w140 for the rear:

Motorcraft
Mobil 1
Amsoil Severe Gear
Valvoline Synpower

Open to others, but these are readily available locally. The way I figure, the reality of it is there will be little to no actual performance or longevity difference in a 1/2 ton pickup. Right?

I can also probably get stuff like Delvac pretty easy, but haven't shopped for it before.

 

[dlundblad]

I've never seen MC gear oil before, so from experience, I'll vote for Valvoline. It'll be cheaper too.

Not knocking M1, but does it have an LSD additive? I assume that's what the LS stands for, but all it says is it performs well with limited slip.

https://mobiloil.com/en/gear-lubricants/mobil-1-synthetic-gear-lube-ls

If you have your own additive or open diffs, it won't matter though.

 

[Donald]

I went for Amsoil SVG as I can depend that they will make a very high quality gear oil. I add Mopar friction modifier if called for.

 

[Lyman]

Been running Ford trucks for many years. Mobil 1 is my choice. Truck will be good for another 100k

 

[TallPaul]

Redline Gear Oil

 

[seanf]

I like Redline gear oils, its local to me and priced 50 cents a litre more than the Castrol Syntec gear oil NAPA sells and I'm sure far superior.