






⚙️ Shift to the future with Red Line’s elite gear oil – because your ride deserves the best!
Red Line 50104 is a full synthetic 75W85 GL-5 gear oil designed specifically for hypoid limited slip differentials. It features advanced friction modifiers for clutch-type LSDs, ensuring smooth operation without shifting issues. Compatible with many late-model luxury and performance vehicles, this oil offers superior thermal stability, wear protection, and quieter, more efficient driving.






| ASIN | B000J3G8KE |
| Best Sellers Rank | #2,061 in Automotive ( See Top 100 in Automotive ) #3 in Gear Oils |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 1,115 Reviews |
| Global Trade Identification Number | 00083522501040 |
| Included Components | 75W85 GL-5, Full Synthetic Gear Oil |
| Item Form | Oil |
| Item Height | 4 inches |
| Item Type Name | ENGINE OIL |
| Item Weight | 2 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Synthetic |
| Package Information | Bottle |
| Recommended Uses For Product | Vehicle |
| UPC | 083522501040 |
| Unit Count | 32.0 Fluid Ounces |
| Viscosity | 75W85 |
| Warranty Description | LIMITED WARRANTY |
S**S
Great price and good quality
Works great Toyota Tacoma 2018
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.
W**E
Great Quality
I purchased this to replace the rear differential fluid on my 2020 explorer and there’s definitely a noticeable difference in the performance. I will be using this again!
C**A
Great stuff looks high quality
Changed differential fluid 15’ tundra , feels better and more responsive after fluid change
W**D
Deferencial oil.
Great old for your deferencial.
P**6
Great Oil!
Meets toyota quality specs, but wish it came with a squeeze bottle. However I will take the quality oil and fill the diffs with a syringe than use the other major brand gear oils. Put in your 3rd gen tacoma and use with faith!
C**R
Great
Used for front and rear differential of my 2020 WK2/Grand Cherokee Trailhawk. No issues. Replace Red Lone fluid after 30k miles and it’s still pretty clean.
S**R
Suggest you try it!
Highly recommend the Redline products! Save money , and every bit as good as the Toyota brand fluid!
Trustpilot
1 month ago
3 weeks ago