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⚙️ Shift smarter, drive smoother — don’t get left behind!
Red Line MT-90 75W-90 GL-4 Manual Transmission Lubricant is a premium gear oil designed to protect and extend the life of your transmission’s synchros. Its specialized formula ensures quicker, smoother shifts even in cold conditions, while being safe for brass synchros by avoiding harmful reactive sulfurs. Trusted since 1979, this pack of three 1-quart bottles delivers high-performance lubrication that meets GL-1, GL-3, and GL-4 standards, making it a top choice for discerning drivers seeking reliability and longevity.






| ASIN | B0CXPXWGY5 |
| Best Sellers Rank | #2,087 in Automotive ( See Top 100 in Automotive ) #5 in Gear Oils |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.9 4.9 out of 5 stars (5,036) |
| Item Form | Fluids,Oil |
| Item Type Name | ACCESSORIES |
| Item Weight | 5.1 Pounds |
| Liquid Volume | 96 Fluid Ounces |
| Manufacturer | Yukon Gear & Axle |
| Material | Brass |
| Model Number | 50304 |
| Number of Items | 3 |
| Part Number | 50304 |
| Recommended Uses For Product | Lubricant,Lube |
| SAE J300 Viscosity Grade | 75W-90 |
| Unit Count | 96.0 Fluid Ounces |
| Upper Temperature Rating | 300 Degrees Fahrenheit |
| Viscosity | 75W90 |
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