YesShould I use HPL differential life 75w-90 w/limited slip additive for all my diffs?
referring to cars in my sig.
Yes, the friction modifiers in the gear oil will help lower temperatures, so it's useful even if you don't have a limited slip diff.Should I use HPL differential life 75w-90 w/limited slip additive for all my diffs
Nope.should I call them and order some without the limited slip additive
We have lots of experience with the differentials in pre 2003 Dodge Cummins 3500s. You want a 75w-140 to try to save the differential if you tow heavy, but you won't keep it from eventually chewing itself up. The 2003+ RAMs have the American Axle 14 bolt differential, which is tough as nails and 75w-90 is fine in those.Only reason I ask is a 90 is kind of light for towing, especially in that '97 Dodge.
My 2500 specs XXW90 from the factory. :/Do you tow heavy with anything? Only reason I ask is a 90 is kind of light for towing, especially in that '97 Dodge.
D70 or D80. 75w90 is fine.We have lots of experience with the differentials in pre 2003 Dodge Cummins 3500s. You want a 75w-140 to try to save the differential if you tow heavy, but you won't keep it from eventually chewing itself up. The 2003+ RAMs have the American Axle 14 bolt differential, which is tough as nails and 75w-90 is fine in those.
When I did all the oil changes on my 19 ram 1500 5.7 I bought the ram additive but was told by amsoil it was already in it.View attachment 197410View attachment 197411
So in my `97 Ram, add slip lock additive also? or is that just specific to the above `19 Ram 1500 5.7?
I My 2500 specs XXW90 from the factory. :/ [/QUOTE] And 5W-30 too..... So why the 0W-40 M1? It's pretty common to up a grade when heavy towing. [ATTACH type="full said:197598[/ATTACH]
And 5W-30 too.....
So why the 0W-40 M1?
It's pretty common to up a grade when heavy towing.
View attachment 197598
Motul Gear 300 comes with 2 flavors, 1 is transmission fluid with GL4/GL5 rating with no LS additive, and the other one is GL5 rating for differential with LS additive.There have been a lot of threads on gear lubes lately; in all honesty for probably 99% of people anything off the Mil-spec J2360 list that @dnewton3 has referenced several times is more than enough, and guarantees a good lube if it’s on the approved list.
With some differentials, especially Torsen, there have been discussions about the no LS/ however much a given lube has LS/ and also some diffs actually need more of the LS additive than comes in the lubes.
It’s been years since I’ve owned anything that needed LS additive; the Motul Gear 300 doesn’t have it IIRC because it’s a transmission fluid and diff lube… the HPL I bought does have it but it doesn’t matter since my truck has an E-locker. I don’t think it’s a big issue if the LS is added unless a given application specifically excludes its use.
Yep, never used the LS. Gear 300 went in all my Subaru diffs and manual trans alike.Motul Gear 300 comes with 2 flavors, 1 is transmission fluid with GL4/GL5 rating with no LS additive, and the other one is GL5 rating for differential with LS additive.