Amsoil rear-end fluid

[horhay]

So I'm thinking of adding Amsoil rear end fluid, but I have a couple of questions:

Is it the "severe duty" stuff I want? Do I need to add the GM additive to it? Where's a good place to buy it?

[Ronemac]

one time i was just looking on the net and i found a page were rear end fluid was tested. the best was torco sgo synthelc with tarco typ g ls additive . i will try try this next time i change mine

[wickedWS6]

bump..where is a good place to buy the amsoil severe and do you have to buy an additive

[Tman]

NOTE: AMSOIL Synthetic Gear Lubes do not require the use of this additive. However , not all differentials respond the same and if chatter is noticed, the addition of AMSOIL Slip-Lock will eliminate it. For chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.

I am curious why do you want to utilize the "severe duty" vice the normal 75-90 ?

[FirstGT]

I just buy it directly from the website. I believe the 'severe duty' just has some extra protection for hard use. I use it in my Jeep, but I off-road with it so I wanted it for that reason.