Oil for sals diff

[mfc]

Changing out the oil in my sals rear.
It has a Detroit locker and high tough axles.... 85w 140 or just 80w90(penrite)???
I’ve had 85/140 in it but is there any benefits ( bearings are oil fed)<—- maxidrive mod
Regards mark

[Red90]

80W90

[towe0609]

Penrite 80w90 gear oil is what I use in both of my Sals - 1 standard diff, 1 with a True Trac.

[Vern]

Sals runs hot, pretty sure rick recommended 85/140 for it.

[mfc]

That’s what I’d heard Vern , though it dosent get much abuse nowdays

[towe0609]

Which oil to use - Salisbury with ARB? (https://www.aulro.com/afvb/technical-chatter/178493-oil-use-salisbury-arb-post1952371.html#post1952371)

Which oil to use - Salisbury with ARB? (https://www.aulro.com/afvb/technical-chatter/178493-oil-use-salisbury-arb-post1965902.html#post1965902)

Salisbury oil quantity (https://www.aulro.com/afvb/technical-chatter/70619-salisbury-oil-quantity-post887031.html#post887031)

Advice seems to be based on diffs with cast covers with poorer heat shedding ability

[mfc]

With no cast cover I think I’ll go back to 80w 90..... same oil through the whole driveline.... big difference between a Detroit unlocker and an arb Locker ... no specifics or warranty violations on the Ashcroft in the front

[Blknight.aus]

80/90 mineral is my goto

also ran

85/140 synth
sae 50 eaton gearbox oil
20/50 engine oil
15/40 engine oil

[incisor]

mob that rebuilt my salisbury recommended 85/140 in qld

and 80/90 in rover diffs

i follow his advice..

[mfc]

80/90 mineral is my goto

also ran

85/140 synth
sae 50 eaton gearbox oil
20/50 engine oil
15/40 engine oil
Thanks Dave ....seems to me that having the same oil throughout the drive train is a better way to go...I’m not towing and if it’s over 35c I’m not driving for hours lol
Interesting that the oil use in an emergency is so broad
Regards mark