ANTI SPIN DIF

[Ram4me]

I have a 2020 RAM 1500 5.7, with a anti spin 3.92 rear differential. Do I need the friction modifier added when I change the fluid.? I was told if the system kicks in electronicly, I don't need it. If it kicks in mechanically I do. Anti spin from what I understand activates electronically. Can someone tell me for sure?

 

[kdoublep]

You need it if you have anti spin. I have the same rear end.

I did amsoil severe gear 75w 140 in the rear with 4 oz mopar modifier even though Amsoil says it has it.

 

[BostonBLS]

Can you post exactly what you bought and quantities? I have to do the same.

 

[Rick3478]

I have a 2020 RAM 1500 5.7, with a anti spin 3.92 rear differential. Do I need the friction modifier added when I change the fluid.? I was told if the system kicks in electronicly, I don't need it. If it kicks in mechanically I do. Anti spin from what I understand activates electronically. Can someone tell me for sure?

Anti-spin AKA limited slip has friction clutches, and needs friction modifier. The e-locker has a dog clutch that is activated electrically, and takes straight heavy gear oil.

Not to be confused with traction control, which applies brakes under computer control based on wheel speed sensor inputs to accomplish similar goals.

 

[kdoublep]

For rear diff 3.92 anti spin
I purchased 3 bags Amsoil 75W 140 Severe Gear which contains Friction modifier however I added a full 4 oz bottle of mopar modifier as well which I got off Amazon.

Drained old stuff. Added bottle of modifier then added gear oil. Plugged her up and went for a cruise. Quiet as a church mouse.

Going to do front diff and transfer case at 75K. I'm at 68K now.

 

[silver billet]

Amsoil also sells a friction modifier lube which you can use instead of the mopar stuff.

https://www.amsoil.com/p/amsoil-slip-lock-differential-additive-adatb/

 

[kapinallinen2]

I have a 2020 RAM 1500 5.7, with a anti spin 3.92 rear differential. Do I need the friction modifier added when I change the fluid.? I was told if the system kicks in electronicly, I don't need it. If it kicks in mechanically I do. Anti spin from what I understand activates electronically. Can someone tell me for sure?

I can tell you for sure that if you have this.

You do not need friction modifier.

 

[1BADRAMLIMITED]

For rear diff 3.92 anti spin
I purchased 3 bags Amsoil 75W 140 Severe Gear which contains Friction modifier however I added a full 4 oz bottle of mopar modifier as well which I got off Amazon.

Drained old stuff. Added bottle of modifier then added gear oil. Plugged her up and went for a cruise. Quiet as a church mouse.

Going to do front diff and transfer case at 75K. I'm at 68K now.

Did u use the full 3 bags or???

 

[kdoublep]

Did u use the full 3 bags or???

Just over 2 bags. 4oz of it was modifier.

 

[Mountain Whiskey]

I have a 2020 RAM 1500 5.7, with a anti spin 3.92 rear differential. Do I need the friction modifier added when I change the fluid.? I was told if the system kicks in electronicly, I don't need it. If it kicks in mechanically I do. Anti spin from what I understand activates electronically. Can someone tell me for sure?

It depends on if tou have "Anti Spin" aka LSD or electronic locking diff. Nothing "kicks in". Electronic locking "kicks in" when you push the button going under 25 mph. LSD is mechanical spring loaded clutches always engaged.

 

[kapinallinen2]

It depends on if tou have "Anti Spin" aka LSD or electronic locking diff. Nothing "kicks in". Electronic locking "kicks in" when you push the button going under 25 mph. LSD is mechanical spring loaded clutches always engaged.

No springs with the current limited slip set up, relies on the spider gears providing thrust against the clutch packs under acceleration.
Supposedly gets better gas mileage.

 

[Mountain Whiskey]

No springs with the current limited slip set up, relies on the spider gears providing thrust against the clutch packs under acceleration.
Supposedly gets better gas mileage.

Thanks, didn't know that!

 

[red396]

i think you guys might be wrong.anti spin rear does not have a clutch pack like the limited slip rear has .anti spin rear is a torsen differential.which uses worm gears.look up you tube anti spin diff

 

[TheWaterman83]

The Rebel has the e-locker, as was mentioned. If you have the e-locker, no you don't need it. If you have the auto-slip diff, then yes, you do. And what is in AmsOil and other commercial gear oils is not enough. You'll get chattering. You will need to add the Mopar additive.

 

[kapinallinen2]

anti spin rear is a torsen differential.

Not in a 1500 5th gen. RAM.
It would be nice if it was.

 

[Mountain Whiskey]

i think you guys might be wrong.anti spin rear does not have a clutch pack like the limited slip rear has .anti spin rear is a torsen differential.which uses worm gears.look up you tube anti spin diff

If this was the case, why would it call for friction modifier?

 

[HSKR R/T]

i think you guys might be wrong.anti spin rear does not have a clutch pack like the limited slip rear has .anti spin rear is a torsen differential.which uses worm gears.look up you tube anti spin diff

I think you are mistaken about what type of rear end these 1500s have

 

[kapinallinen2]

“NOTE:

Limited Slip Differential (LSD) equipped vehicles should be road tested by making 10 to 12 slow figure-eight turns. This maneuver will pump the lubricant through the clutch discs to eliminate a possible chatter noise complaint”

 

[Rambroh]

You need it if you have anti spin. I have the same rear end.

I did amsoil severe gear 75w 140 in the rear with 4 oz mopar modifier even though Amsoil says it has it.
View attachment 176507

I have a 2019, 1500 with 3.12 rear and manual says to add 5 ounces of friction modifier additive. I am going to use the Amsoil 75–140 so do I really have to worry about 1 ounce of the modifier since the bottle comes in 4 ounces and considering Amsoil already contains a modifier? Any downside to using heavier oil vs 75-90 per manual?

 

[Mountain Whiskey]

I have a 2019, 1500 with 3.12 rear and manual says to add 5 ounces of friction modifier additive. I am going to use the Amsoil 75–140 so do I really have to worry about 1 ounce of the modifier since the bottle comes in 4 ounces and considering Amsoil already contains a modifier? Any downside to using heavier oil vs 75-90 per manual?

I think it recommends the heavier oil for severe duty. For the friction modifier, you probably need it. You can always drive it without and see if you have any chattering on sharp turns.