For use on certain limited-slip differentials to reduce chatter and hypoid gear noise levels. Use according to owner guide recommendations.
- For use on certain limited-slip differentials to reduce chatter and hypoid gear noise levels
- Use according to owner guide recommendations
- Formulated for automotive use
- Added to lubricants to reduce the surface friction of the lubricated parts















1olddawg –
Maybe I’m weird. I think it smells great. Kind of like used transmission oil, or the smell of diesel smoke. I had the front/rear differentials serviced. Soon after, my truck developed a shudder from the rear differential under load. After adding the modifier the shudder slowly disappeared . I put the used funnel in our barn where my wife does bouquet prepping. A few days later I noticed the funnel had been moved outside. 😂
Amazon Customer –
Helped reduce rear-end noise in my Ford Sport Trac!
KiFFeN –
Only complaint is the smell, that is to be expected.
Amazon Customer –
Price was good , product works like it made to.
Shannon Richards –
The temp of my transmission steadily stayed around 180-190. Now that I have had this in my transmission for a month I’m running about 160. Works great.
Mike J. –
I recently changed the fluid in my 8.8 limited slip differential with Mobile1 oil for limited slip applications (the bottle said “LS”). However, my diff still chattered around slow turns and in parking lots. I couldn’t figure out why my truck felt so weird. I even wondered if my drive shaft u-joints were going bad.Anyway, I finally realized I needed a friction modifier. I added 1 bottle to my diff. Within 10 minutes of driving my truck felt like butter. This stuff is amazing.As others say, it stinks. Its nothing crazy…mostly just smells like old gear oil. But definitely keep the box from Amazon out of your house, wear gloves and don’t spill. This stuff is magic in a bottle.
Willie S –
Confident because it’s motorcraft
gregg –
This is recommended by Ford Motor Company. Super easy to add during the differential flush.