--- product_id: 279005618 title: "58204 Heavy ShockProof Gear Oil - 1 Quart Bottle" brand: "red line" price: "AR$136780" currency: ARS in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.com.ar/products/279005618-58204-heavy-shockproof-gear-oil-1-quart-bottle store_origin: AR region: Argentina --- # Longer drain intervals for extended performance Trusted in top-tier racing differentials Polyol ester synthetic base for extreme lubrication 58204 Heavy ShockProof Gear Oil - 1 Quart Bottle **Brand:** red line **Price:** AR$136780 **Availability:** ✅ In Stock ## Summary > ⚡ Shift into high gear with Red Line’s shockproof power! ## Quick Answers - **What is this?** 58204 Heavy ShockProof Gear Oil - 1 Quart Bottle by red line - **How much does it cost?** AR$136780 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/279005618-58204-heavy-shockproof-gear-oil-1-quart-bottle) ## 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 - • **Extended Service Life:** Designed for longer drain intervals, saving you time and maintenance costs without compromising performance. - • **Trusted Legacy Since 1979:** Red Line’s uncompromising quality ensures your vehicle performs at its peak, race after race. - • **Race-Proven Synthetic Formula:** Engineered from advanced polyol ester base stocks for unmatched lubrication under extreme conditions. - • **Maximized Differential Efficiency:** Boosts mileage and reduces wear, exceeding API GL-5 standards for superior drivetrain protection. - • **Specialized ShockProof Performance:** The go-to gear oil for high-demand racing setups including Sprint, Midget, and NHRA Top Fuel rear ends. ## Overview Red Line 58204 Heavy ShockProof Gear Oil is a fully synthetic, polyol ester-based lubricant designed to deliver exceptional protection and efficiency for high-performance differentials. Exceeding API GL-5 specs, it extends drain intervals and reduces wear, making it a top choice for racing and specialty applications since 1979. ## Description These products on exceptionally high order fulfillment rates, breadth of available products and these are also complete line of Heavy-Duty Shop Products that will bring you years of reliable performance. Review: This is very good for Harley transmissions. Shifts smooth. Easy to find neutral. Review: Questo olio per differenziale è veramente fantastico e mantiene ciò che promette. E' bene ricordare che è un olio per differenziale e non va usato nei cambi con sincronizzatori. Leggere le indicazioni di utilizzo e la scheda tecnica, sono chiare e ben fatte. ## Features - FULLY-SYNTHETIC FORMULAS - created from polyol ester base stocks, offer excellent lubrication under extreme conditions - ENGINEERED TO PROVIDE - the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear, exceed API GL-5 specifications - NOT RECOMMENDED - for most synchro applications due to the product's extreme slipperiness - POPULAR GEAR OIL FOR - Many performance racing applications like Sprint, Midget, Dirt Late Model and Quick Change Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear ends, most popular ShockProof product, many racing and specialty applications - WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000CPI5XW | | Best Sellers Rank | #12,204 in Automotive ( See Top 100 in Automotive ) #262 in Automotive Oils | | Brand | Red Line | | Customer Reviews | 4.8 4.8 out of 5 stars (937) | | Date First Available | 12 August 2012 | | Exterior | Painted | | Item Weight | 771 g | | Item model number | 58204 | | Manufacturer | Red Line | | Manufacturer Part Number | 57-6525 | | Model | Red Line 57-6525 | | OEM Part Number | 58204 | | Product Dimensions | 22.86 x 9.88 x 9.83 cm; 771.11 g | | Viscosity | 75W90 | ## Product Details - **Brand:** Red Line - **Item weight:** 771 g - **Liquid volume:** 32 Fluid Ounces - **Material:** Synthetic - **Package information:** Bottle ## Images ![58204 Heavy ShockProof Gear Oil - 1 Quart Bottle - Image 1](https://m.media-amazon.com/images/I/71GC5ofv8fL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What viscosity is this particular oil?** A: Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90For heavily-loaded racing differentials and transmissions, problem gearboxesMany performance racing applications like Sprint/Midget/Dirt Late Model Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear endsNot recommended for most synchro applications due to the product's extreme slipperiness **Q: What is the viscosity of this? Need a specific number.** A: Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90. This is from the manufacturer's site. **Q: Canged primary chain OIL of my 2002 RoadKing ScreamingEagle I made a MISTAKE! Added REDLINTransFluidw/Shockproof. IS It COMPATABLE** A: I would think not. As the primary runs a 20w 50 and the red line is something like 75 90 it's going to a lot thicker. I would call a local Indy not HD and ask them for sure. **Q: Is this GL5?** A: It exceeds API GL-5 specifications. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***O on 3 January 2026* This is very good for Harley transmissions. Shifts smooth. Easy to find neutral. ### ⭐⭐⭐⭐⭐ Review *by N***C on 6 June 2021* Questo olio per differenziale è veramente fantastico e mantiene ciò che promette. E' bene ricordare che è un olio per differenziale e non va usato nei cambi con sincronizzatori. Leggere le indicazioni di utilizzo e la scheda tecnica, sono chiare e ben fatte. ### ⭐⭐⭐⭐⭐ Review *by 3***0 on 7 March 2020* My 3rd gear synchro was failing and grabbing and gridning getting in to gear, after a bit of reading I decided to try this and it fixed my gearbox and saved me $1000s. ## Frequently Bought Together - Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart - Red Line 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart - K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils, Wrench Off Nut: Fits Select Harley Davidson Motorcycles, KN-171B --- ## 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.com.ar/products/279005618-58204-heavy-shockproof-gear-oil-1-quart-bottle](https://www.desertcart.com.ar/products/279005618-58204-heavy-shockproof-gear-oil-1-quart-bottle) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-19*