Gear oil choice

[Honky Kong jr]

so it's time to put oil in my front and back rears. I'm gonna beat on this thing pretty hard. I have a 12 bolt back with a clutch type posi and a 10 bolt Eaton 30 spline clutch type posi in the front. I know they both need the additive but looking for a recommendation on weight. 80/90,85/90 or 85/140. @crazy4offroad you seem to be the gear guy and use your truck as this one is gonna be used.

 

[crazy4offroad]

80/90 is fine, I just look for what's on sale, or order it through Advance Auto and get a big discount using discount codes you can find online, and select store pickup. However that makes you start looking at what else you might need to pick up, and you end up with a $100 order of miscellaneous stuff.

 

[Honky Kong jr]

80/90 is fine, I just look for what's on sale, or order it through Advance Auto and get a big discount using discount codes you can find online, and select store pickup. However that makes you start looking at what else you might need to pick up, and you end up with a $100 order of miscellaneous stuff.

Cool thanks I have 20 off 50 from my calipers and I need brake fluid and posi stuff that should do it.

 

[crazy4offroad]

A quick search found this, 30% off $50 order...
SCW4172
Cart still has to be worth at least $50 after discount code applied, that's how they get ya.

 

[Honky Kong jr]

Yeah they ain't in it to lose money the pricks lol

 

[smoothandlow84]

I use 80/90 Royal Purple. Its not the cheapest, but it has outlasted other conventional brands. It drastically quiets down my differertial. I also only use Royal Purple on my Toyota crawler as well...gearbox, transfer case, and both diffs.

 

[Honky Kong jr]

A quick search found this, 30% off $50 order...
SCW4172
Cart still has to be worth at least $50 after discount code applied, that's how they get ya.

Well a gallon of 80/90,2 tubes of posi juice, 2quarts of brake fluid and a lighter for 32 bucks after 20 off 50 lol the lighter was to meet the required total lol