--- product_id: 409792479 title: "80301 Limited Slip Friction Modifier - 4 oz." brand: "red line" price: "357 Lei" currency: RON in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.ro/products/409792479-80301-limited-slip-friction-modifier-4-oz store_origin: RO region: Romania --- # Tunes limited-slip differentials Optimized for 75W90 gear oils 4 oz precision dosing 80301 Limited Slip Friction Modifier - 4 oz. **Brand:** red line **Price:** 357 Lei **Availability:** ✅ In Stock ## Summary > ⚙️ Unlock your ride’s hidden grip with Red Line finesse! ## Quick Answers - **What is this?** 80301 Limited Slip Friction Modifier - 4 oz. by red line - **How much does it cost?** 357 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/409792479-80301-limited-slip-friction-modifier-4-oz) ## 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 - • **Corrosion Defense:** Synthetic formula protects your drivetrain from wear - • **Effortless Application:** Ready-to-use liquid, no assembly required - • **Universal Compatibility:** Seamlessly blends with any gear oil, no hassle - • **Precision Performance Boost:** 4 oz bottle designed for exact additive control - • **Tailored Limited-Slip Tuning:** Fine-tune your differential for peak traction ## Overview Red Line 80301 Limited Slip Friction Modifier is a synthetic 4 oz liquid additive engineered to replace standard limited-slip additives. Compatible with all 75W90 gear oils, it fine-tunes limited-slip differentials while preventing corrosion, ensuring enhanced traction and drivetrain longevity without any assembly. ## Description Limited-slip or Positraction units use plates or clutches to provide the proper amount of lock-up to the differential. Slippery lubricants are required to prevent chatter but too much slipperiness causes excess wheel spin reducing traction.For perfect traction use Red Line 75W90NS and add the Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive until the chatter disappears.Satisfies performance requirements of GM 1052358 Ford M2C118-A 19B546-MA Chrysler 4318060 and most imports.Recommended Dosage:Use 4% for prevention of limited slip chatter in broken-in units (typical one 4 oz. bottle) or 4 to 8% for the break-in of new differentials.Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive will significantly reduce the friction during break-in of differentials. High temperatures encountered in break-incan destroy the hardening of the gear teeth causing rapid wear of the softened gears. This additive can reduce the break-in temperatures by as much as 50 F improving break-in conditions. Compatible with petroleum or synthetic gear oils. Red Line Gear Oils already contain this additive (except the NS).In non limited-slip racing differentials and quick change units using the Red Line ShockProof Gear Oils an additional 3 to 6% Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive is recommended. Compatible with both petroleum and synthetic gear oils Reduces break-in temps as much as 50 F Add 1oz at a time to clutch-type limited slip or posi-traction units to eliminate chatter Fully-synthetic formulas created from polyol ester base stocks offer excellent lubrication under extreme conditions High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears Superior shear stability and reduced oxidation compared to o Review: Good product, perfect for limited slip Review: 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 ## Features - Replaces the limited-slip additives - Can be added to any gear oil - Ideal to tune a limited-slip unit ## Technical Specifications | Specification | Value | |---------------|-------| | Material | Synthetic | | Brand | Red Line | | Package Information | Bottle | | Liquid Volume | 4 Fluid Ounces | | Recommended Uses For Product | Limited-slip differentials, Differential break-in | | Viscosity | 75W90 | | Specific Uses For Product | Prevent Corrosion | | Item Form | Liquid | | Global Trade Identification Number | 00083522803014 | | Manufacturer | Red Line | | UPC | 083522803014 | | Number of Items | 1 | | Product Dimensions | 5.97 x 5.72 x 11.94 cm; 110 g | | Item model number | 80301 | | Manufacturer Part Number | 80301 | | OEM Part Number | 80301 | | Colour | Red | | Assembly Required | No | | Item Weight | 110 g | ## Product Details - **Material:** Synthetic - **Brand:** Red Line - **Package Information:** Bottle - **Liquid Volume:** 4 Fluid Ounces - **Recommended Uses For Product:** Limited-slip differentials, Differential break-in ## Images ![80301 Limited Slip Friction Modifier - 4 oz. - Image 1](https://m.media-amazon.com/images/I/71auZeP6jKL.jpg) ![80301 Limited Slip Friction Modifier - 4 oz. - Image 2](https://m.media-amazon.com/images/I/81TPVqxAqeL.jpg) ![80301 Limited Slip Friction Modifier - 4 oz. - Image 3](https://m.media-amazon.com/images/I/810gACQMFNL.jpg) ![80301 Limited Slip Friction Modifier - 4 oz. - Image 4](https://m.media-amazon.com/images/I/81owXIUH2ML.jpg) ![80301 Limited Slip Friction Modifier - 4 oz. - Image 5](https://m.media-amazon.com/images/I/81KJh4T38wL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Good product, perfect for limited slip *by K***E on 26 October 2024* ### ⭐⭐⭐⭐⭐ Muy bueno *by C***I on 1 October 2024* 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 ### ⭐⭐⭐⭐⭐ Worked a treat! *by J***. on 13 July 2022* ## 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.ro/products/409792479-80301-limited-slip-friction-modifier-4-oz](https://www.desertcart.ro/products/409792479-80301-limited-slip-friction-modifier-4-oz) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-07-15*