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⚙️ Shift to the future of drivetrain performance — don’t get left behind!
Red Line 50104 is a premium 75W85 full synthetic GL-5 gear oil engineered for hypoid limited slip differentials and high-performance applications. It delivers superior thermal stability, friction control, and cold-weather flow, making it ideal for both street and competition use. Compatible with a wide range of vehicles including BMW, Ford, Toyota, and racing transaxles, it enhances drivetrain efficiency, reduces wear, and extends service intervals.
| ASIN | B01LOJT8UI |
| Best Sellers Rank | #2,552 in Automotive ( See Top 100 in Automotive ) #7 in Gear Oils |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Quart |
| Customer Reviews | 4.8 out of 5 stars 1,240 Reviews |
| Included Components | GL-5 Gear Oil |
| Item Form | Oil |
| Item Weight | 6 Pounds |
| Liquid Volume | 4 Quarts |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | 50104 |
| Number of Items | 4 |
| Package Information | Quart |
| Part Number | 50104 |
| Recommended Uses For Product | Automotive |
| Specific Uses For Product | Differential Oil, Final Drive Oil, Gear Oil, Transfer Case Fluid, Manual Transmissions (with caution), Formula Racing Transaxles, High Heat, Extreme Cold, Wet Conditions, Corrosion Prevention, Efficiency Increase |
| UPC | 083522501446 |
| Unit Count | 128.0 Fluid Ounces |
M**M
Great product
Seems great! No issues, and a great alternative to the Toyota oil that sells for $130 a quart!
R**R
Red Line compared to Original gear oil during Servicing
I changed the rear differential fluid in my 2021 Kia Seltos Turbo at 50 K miles. The original oil was clear. Checked and clean the magnet. Small amount of powered filings on magnet, normal condition. Replaced with Redline75W85 GL-5 Full Synthetic Gear Oil. The original fluid had a fish smell to it, possibly regular gear oil. The Redline nearly no smell and the oil felt more slippery on my hand. After fluid install, I drove the car in traffic and the interstate. I felt like I had a little more power and easier acceleration from a Stop. I can tell the rear end is quieter as well. Next I will replace the transmission fluid. Being a dual clutch the Redline MT fluid will hopefully complement the performance increase. It should increase MPG a little. Very Good lubricant.
D**S
Top-tier gear oil.
This is hands down one of the best gear oils I’ve used. Used Red Line in my 2021 Defender 90, 2020 Grand Cherokee Overland and various Ford trucks. The fluid has excellent film strength and the limited-slip additives worked without needing any extra modifier.
J**Y
Great
Great product!
P**S
Toyota Rear Differential Lube
Competitive price and timely delivery
A**R
redline
Great product and fast shipping!
L**E
Works
Hasn’t destroyed the car so far so I guess it works well!
F**H
Good Product!
Good Stuff!
J**N
Rear diff oil
I chose red line as it has the friction modifier already added which was perfect for my Mk3 focus rs. Great product Great delivery time. Very Happy 👌🏻😎🤪
M**B
Super
it is the correct product with all the amazing quality for my Jeep 2017 Grand Cherokee Laredo differential
J**K
Great product
Works well in my bmw and mercedes. Smells terrible but works great.
J**Z
Just What You Need for Axle oil change
Perfect and good price
I**A
Best!
The Best For Me!
Trustpilot
2 months ago
1 week ago