






⚙️ Unlock smooth power and silence the chatter — your differential’s new best friend!
Red Line 80301 Limited Slip Friction Modifier is a premium 4 oz. additive engineered to optimize limited-slip differentials by reducing chatter, improving mileage, and extending oil life. Its high viscosity-index formula ensures consistent performance across temperature variations and is compatible with both synthetic and petroleum gear oils. Trusted since 1979, it’s the go-to solution for professionals seeking superior drivetrain efficiency and protection.






| ASIN | B000CPCBGE |
| Best Sellers Rank | #64,159 in Automotive ( See Top 100 in Automotive ) #267 in Oil & Fluid Additives |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 282 Reviews |
| Global Trade Identification Number | 00083522803014 |
| Item Form | Oil |
| Liquid Volume | 4 Fluid Ounces |
| Liquid volume | 4 Fluid Ounces |
| Lower Temperature Rating | 10 Degrees Celsius |
| Manufacturer | Red Line |
| Material | Polytetrafluoroethylene (PTFE) |
| Package information | Bottle |
| Recommended Uses For Product | Automotive |
| Recommended uses for product | Automotive |
| Specific Uses For Product | Limited-Slip Differentials |
| UPC | 083522803014 |
| Unit Count | 4 Milliliters |
| Upper Temperature Rating | 400 Degrees Fahrenheit |
| Viscosity | High |
K**E
Good product, perfect for limited slip
Added to grand cherokee rear differential, worked as expected.
C**I
Muy bueno
Este modificador de frucción me ha ido fantástico en el diferencial autoblocante trac lok de mi grand cherokee zj. Se han acabado los ruídos que tenía porque se enganchaban.los discos. Aunque tenía aceite 75W140 especial para autoblocante, no hacía bien su función. Saqué 110ml de aceite y lo sustituí por este botecito, y mano de santo. Si tienes ruídos o crujidos raros en el autoblocante, no dudes en ponerlo, serás feliz
J**.
Worked a treat!
I fitted a limited slip differential gearbox to my mini which creaked and moaned and groaned when turning slowly. Added half a bottle of this to the oil in the gearbox and the problem was gone instantly.
J**N
Add 1 Ounce then do several figure 8's in a parking lot.
Worked like a charm but you have to spend 20 minutes doing figure 8's at slow speed. Solved the drag sound.
M**D
Erfüllt seinen Zweck - Redline 80301
Habe den Zusatz beim Ölwechsel meinem Limited Slip Differential beigemischt wie vorgegeben. Die Menge der (überraschend kleinen) Flasche enstpricht genau der vorgeschriebenen Menge (118ml). Konnte bislang keine Probleme feststellen, es erfüllt seinen Zweck.
Trustpilot
2 weeks ago
2 weeks ago