--- product_id: 52367861 title: "Redline 80301 Limited Slip Friction Modifier - 4 Ounce" brand: "red line" price: "VT9836" currency: VUV in_stock: false reviews_count: 10 category: "Red Line" url: https://www.desertcart.vu/products/52367861-redline-80301-limited-slip-friction-modifier-4-ounce store_origin: VU region: Vanuatu --- # Improves mileage & extends drain intervals Precision friction modifier for chatter-free turns High viscosity-index for stable performance Redline 80301 Limited Slip Friction Modifier - 4 Ounce **Brand:** red line **Price:** VT9836 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Unlock silent power and smoother rides with every turn! ## Quick Answers - **What is this?** Redline 80301 Limited Slip Friction Modifier - 4 Ounce by red line - **How much does it cost?** VT9836 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/52367861-redline-80301-limited-slip-friction-modifier-4-ounce) ## Best For - red line enthusiasts ## Why This Product - Trusted red line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Compatibility:** Works seamlessly with both synthetic and petroleum gear oils—no compromises. - • **Trusted Legacy Since 1979:** Red Line’s proven formula outperforms and protects better than any competitor. - • **Thermally Stable Viscosity:** Maintains consistent film thickness from 10°C to 400°F for reliable protection. - • **Precision Dosing for Smooth, Silent Turns:** Add 1oz increments to eliminate limited-slip chatter instantly. - • **Engineered for Peak Differential Efficiency:** Maximize mileage and minimize wear with advanced friction control. ## Overview Redline 80301 Limited Slip Friction Modifier is a high-performance additive designed to enhance differential efficiency by reducing chatter and wear. Compatible with all gear oils, it stabilizes viscosity across extreme temperatures and extends oil life, delivering smoother, quieter limited-slip differentials trusted by professionals since 1979. ## Description Red Line differential friction modifier and break-in additives can be added to any gear oil to replace the limited-slip additives. They are ideal to tune a limited-slip unit. Review: 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. Review: Brillant stuff will buy again - Bought this as I have a Drexler plated diff and I’ve purchased various top brand gearbox oils but still had slight noise and chatter going round very tight corners. So I put in normal 75w 85 oil in and added a ounce at a time until noise and chatter had gone, I can say it has no noise what so ever and this is a brilliant product. ## Features - ENGINEERED - to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear - DIRECTION - Add 1oz at a time to clutch-type limited slip or posi-traction units to eliminate chatter - HIGH VISCOSITY-INDEX - to provide relatively constant viscosity and film thickness with varying temperature change, exceed API GL-5 specifications - COMPATIBLE WITH - both petroleum and synthetic gear oils - WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000CPCBGE | | Best Sellers Rank | 12,387 in Automotive ( See Top 100 in Automotive ) 6 in Agricultural Vehicle Oils & Fluids | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.6 out of 5 stars 284 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 | | Package information | Bottle | | Recommended Uses For Product | Automotive | | Recommended uses for product | Automotive | | Specific Uses For Product | Limited-slip differential friction modification and break-in | | UPC | 083522803014 | | Unit Count | 4.0 millilitre | | Upper Temperature Rating | 400 Degrees Fahrenheit | | Viscosity | High | ## Product Details - **Brand:** Red Line - **Liquid volume:** 4 Fluid Ounces - **Material:** Polytetrafluoroethylene - **Package information:** Bottle - **Recommended uses for product:** Automotive ## Images ![Redline 80301 Limited Slip Friction Modifier - 4 Ounce - Image 1](https://m.media-amazon.com/images/I/71auZeP6jKL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Would the 95 Isuzu 4x4 front differential benefit from this additive? I know the rear limited slip diff does!** A: No, unless it's a limited slip after market and specifies such. On the rear positive, too much would cause slippage between the plates. Just ad enough to stop the clanging. Too much would lesson the Limited slip . **Q: Can this be used in redlline dct fluid that is used in a manual tranmission with lsd?** A: It was purchased for my son. I didn't use it. My son is a car mechanic, so I think it is a good product. **Q: Would this help a 95 Isuzu front 4x4 differential? ...that chatters around corners on pavement?** A: Check your u-joints but if there ok. Let me know if it worked. Differential Gear oil is supposed to be replaced on a regular Preventative maintenance Schedule. I don’t know what the mileage is on your car is but it couldn’t hurt “unless your vehicle is not a LSD Diff.” Thanks! **Q: do I need that for my 99 chevy express 1500 V8 with amsoil 80W90 together?** A: My chevy Silverado 2500HD ran better after adding a 4oz. can of Redline with the rear gear oil. There is also an additive for the transfer case GM put in during a service. I would double check before putting that in the transfer case. Keep on reading, you'll find the answer. Good Luck ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked a treat! *by J***. on 13 July 2022* 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. ### ⭐⭐⭐⭐⭐ Brillant stuff will buy again *by G***E on 28 June 2020* Bought this as I have a Drexler plated diff and I’ve purchased various top brand gearbox oils but still had slight noise and chatter going round very tight corners. So I put in normal 75w 85 oil in and added a ounce at a time until noise and chatter had gone, I can say it has no noise what so ever and this is a brilliant product. ### ⭐⭐⭐⭐⭐ works well *by A***R on 4 September 2020* worked well stopped my lsd knocking ## Frequently Bought Together - Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Sealey AK54 550ml Oil Suction Syringe, Multicoloured --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/52367861-redline-80301-limited-slip-friction-modifier-4-ounce](https://www.desertcart.vu/products/52367861-redline-80301-limited-slip-friction-modifier-4-ounce) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-06-03*