Hi,

I have a DANA 80 with Limited Slip Differential that I’m draining/changing fluid in.

How many oz. of additive do I need for a complete oil change please?

Thanks Leaky

All the products I've used typically already comes as a pre-measured dose. Unless you happen to use gear oil with the additive already.

 

I use Cat friction modifier and add a bit then run it. I add more if it's still chirping, mine does need a little more but it is 100% better than with none.

Thing to remember is if you're not using recommended additive you won't know how much so be cautious, you can always add but you can't remove

I get a small bottle of the mopar additive, its probably a 4oz bottle

3.2L which includes 0.05L of friction modifier   

Also, please note that last paragraph...

On 6/12/2019 at 2:52 PM, IBMobile said:

I grabbed a bottle from O'Reillys and added it to the mix just in case.  Don't remember how many ounces it was but it was small and around $10 for it.

I got to do this to my work rig. rear diff takes about 4.5 qts of oil..... so how much additive? I'm old guy so liters belong up in Canada not down here. 

22 minutes ago, JAG1 said:

so how much additive?

It calls for a "container" of friction modifier and the container is 4 oz. but there are larger containers available.     You can purchase it at these fine retailers.

https://www.amazon.com/Genuine-Mopar-4318060AC-Limited-Addit of ive/dp/B000TTEX8W

 

https://www.oreillyauto.com/detail/b/lubegard-4125/chemicals---fluids-16461/maintenance-chemicals-16867/grease---lube-16582/gear-oil---additives-16905/gear-oil---additives-19589/235bd5f02420/lubegard-mixture-limited-slip-friction-modifier/42851/4409964/2000/dodge/ram-2500?pos=1

 

https://www.autozone.com/greases-and-gear-oil/gear-oil-additive/k-w-products-7-oz-posi-trac-gear-oil-additive/17352_0_0

If I had a limited slip. I think I'd be tempted to fill it full of at4 or tractor transmission fluid. Just to see how it feels 

I'm thankful to have a standard open diff in both trucks. No special fluids needed. 80w-90 GL-5 fluid.

39 minutes ago, Evan said:

If I had a limited slip. I think I'd be tempted to fill it full of at4 or tractor transmission fluid. Just to see how it feels 

I'm glad yer not my Doctor, Evan  

3 minutes ago, Mopar1973Man said:

I'm thankful to have a standard open diff in both trucks. No special fluids needed. 80w-90 GL-5 fluid.

It's not hard to add 4 ounces in there and sure is nice being able to pull out the concrete pump when he got stuck  They were amazed.

Edited September 15, 20195 yr by JAG1

2 minutes ago, JAG1 said:

I'm glad yer not my Doctor, Evan  

 

Maybe you should being he would be the best kind of Doc. Being he's not going to follow the conventional methods. I would rather trying something different than constantly following OEM specs... Thumbs up to you Evan!

Edited September 15, 20195 yr by Mopar1973Man

3 minutes ago, Mopar1973Man said:

 

Maybe you should being he would be the best kind of Doc. Being he's not going to follow the conventional methods. I would rather trying something different than constantly following OEM specs... Thumbs up to you Evan!

I know.... I was just meant it to be light hearted not stirring the pot as I'm terrible cook anyway.

Edited September 15, 20195 yr by JAG1

Got your goat... Even being serious too. 

1 hour ago, Mopar1973Man said:

Got your goat... Even being serious too. 

Rascal Head 

Hey, 'Mopar1973Man', While I got your attention..... do you listen for chatter on the tires to road or to the clutches inside the differential if there isn't enough additive?

 

Thank you

 

On 6/9/2019 at 5:02 PM, Leaky88 said:

Hi,

I have a DANA 80 with Limited Slip Differential that I’m draining/changing fluid in.

How many oz. of additive do I need for a complete oil change please?

Thanks Leaky

I put 4 ounces in the gear oil like IBMobile said to do. Mine takes 4 and a half qts. Seems to be smooth no chattering, but still need to make some tight turns when I've got time.

 

 

Edited September 17, 20195 yr by JAG1

I put tractor transmission fluid in everything. That's what's in my entire truck well not the motor or brakes. Not sure what's in the power steering 

 

It's made for heavy duty wet clutches. Though it may not work in dana at that doesn't have fluid pressure. 

 

Would be worth a try you could tell right away with truck jacked up. If both tires go forward when you turn one it's working or would at least appear to be with no load. 

 

I always wanted to convert to hubs and run full Detroit locker in the front and leave the rear 80 open. Great street manners and option to lock one or both front hubs as needed.