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Item #:
27960814
SAE 75W-90 Full Synthetic Gear Oil API GL-5 MT-1 Limited Slip Differential Fluid - 1 Gallon - All-Weather Extreme Pressure Protection
Item #:
27960814
TTD 197
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What Stands Out
High-Performance Formula
Ultra1Plus features a synthetic formula that ensures superior lubrication under extreme conditions, reducing wear and tear compared to conventional oils, thus extending the lifespan of your gear systems.
API GL-5 Rated
Meets API GL-5 standards, ensuring compatibility with a wide range of vehicles. This rating guarantees optimal protection for hypoid gear applications, providing peace of mind for drivers seeking reliability.
Temperature Stability
Designed to perform in both high and low temperatures, Ultra1Plus maintains viscosity for consistent performance. This feature ensures optimal gear operation in diverse environments, enhancing vehicle reliability and efficiency.
Product Details
| Brand Name | ULTRA 1PLUS |
| Recommended Uses For Product | Front and rear differentials, hypoid gear sets, light truck drivetrains, SUV maintenance, 4x4 off-road vehicles, heavy-duty towing applications, high-performance transaxles, limited-slip differentials (LSD), gearbox protection, extreme pressure environments, cold weather shifting, high-temperature racing conditions, automotive gear maintenance, fleet vehicle service, agricultural equipment gearboxes. |
| Item Form | Oil |
| Manufacturer | Ultralub |
| Unit Count | 128.0 Fluid Ounces |
| UPC | 810050654135 |
| Number of Items | 1 |
| Part Number | UFS7590GL4G |
| Model Number | SAE 75W-90 Synthetic Gear Oil API GL-5 |
| Item Type Name | Gear Oil |
| Container Type | US Gallon |
| Viscosity | 75W-90 SAE Grade |
| Flash Point | 205 Degrees Celsius |
| SAE J300 Viscosity Grade | 75W-90 |
| Liquid Volume | 1 Gallons |
| Item Weight | 7.5 Pounds (3.4 kg) |
| Material | Synthetic |
| Brand | ULTRA 1PLUS |
| Package Information | US Gallon |
Who Should Buy?
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High Performance Vehicles
Ideal for performance cars requiring high-quality gear oil that withstands extreme conditions and enhances durability.
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Heavy-Duty Applications
Suitable for trucks and SUVs involved in heavy towing, providing seamless gear operation and reducing wear.
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Temperature Variability
Excellent for use in environments with extreme temperature fluctuations, offering consistent performance and protection.
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Standard Passenger Cars
May not be necessary for standard vehicles with less demanding gear oil requirements, potentially leading to overspending.
Product Description
SAE 75W-90 Full Synthetic Gear Oil API GL-5 MT-1 Limited Slip Differential Fluid - 1 Gallon - All-Weather Extreme Pressure Protection
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is ULTRA 1PLUS SAE 75W-90 Synthetic Limited Slip Gear Oil?
Answer: ULTRA 1PLUS SAE 75W-90 Synthetic Limited Slip Gear Oil is a high-performance gear oil designed to enhance the operation of limited-slip differentials. It is engineered to meet the specifications of API GL-5, ensuring superior lubrication under extreme conditions. This synthetic formulation not only provides excellent protection against wear and corrosion but also delivers improved thermal stability for consistent performance. Ideal for automotive enthusiasts and those using vehicles in demanding environments, this gear oil helps maintain smooth gear transitions, reduces friction, and prolongs the lifespan of differential components. -
Question:
What is the viscosity rating of this gear oil?
Answer: The ULTRA 1PLUS operates at a viscosity rating of 75W-90. This means the oil performs well in both cold and warm temperatures, ensuring a smooth flow during low-temperature startup and providing strong lubrication at higher operating temperatures. The '75W' designation indicates its winter grade, showing it remains fluid in colder climates, while '90' denotes its high-temperature viscosity. For users who frequently drive in variable temperature conditions or who use their vehicles for towing or off-roading, this balance provides reliability and protection where it matters most. -
Question:
Is ULTRA 1PLUS suitable for all vehicles?
Answer: While ULTRA 1PLUS SAE 75W-90 is a versatile gear oil, it is specifically designed for vehicles requiring API GL-5 specifications. It is suitable for most passenger cars, sports cars, and light trucks that utilize limited-slip differentials. However, it’s essential to consult your vehicle’s owner manual for compatibility. For users dealing with high-performance vehicles or modified systems, this gear oil is particularly beneficial as it helps to maintain optimal performance and stability in demanding situations. -
Question:
How does synthetic gear oil differ from conventional gear oil?
Answer: Synthetic gear oil, like ULTRA 1PLUS, is formulated using advanced chemical compounds that offer enhanced protective properties compared to conventional oils. Synthetics provide superior lubrication, better resistance to breakdown under heat, and improved fluidity at low temperatures. This means less wear on gear components and better overall performance. For example, drivers pushing their vehicles to the limit, such as during racing or heavy towing, will appreciate the added durability and performance consistency that synthetic gear oils deliver. -
Question:
Can I mix ULTRA 1PLUS with other types of gear oils?
Answer: It is generally not recommended to mix ULTRA 1PLUS with other types of gear oils, especially those with different base oils or additives. Mixing can dilute the performance benefits and could lead to issues such as reduced lubrication properties or increased wear. For optimal performance, it’s best to completely drain existing oil before refilling with ULTRA 1PLUS. For users who want to ensure the longevity and efficiency of their gear systems, starting fresh with a single high-quality lubricant is best. -
Question:
What are the benefits of using a limited-slip gear oil?
Answer: Limited-slip gear oils, such as ULTRA 1PLUS, are designed to ensure that power is distributed evenly among the wheels, which is crucial in maintaining traction during slippery or uneven driving conditions. This capability helps to enhance vehicle stability and control, particularly during acceleration. For performance enthusiasts, having a limited-slip differential significantly improves handling dynamics during cornering and high-speed maneuvers. Therefore, using specialized gear oil contributes to both safety and enhanced driving experiences. -
Question:
What applications can benefit from using ULTRA 1PLUS?
Answer: ULTRA 1PLUS is beneficial for a wide range of applications, including passenger vehicles, performance cars, SUVs, and light trucks that utilize limited-slip differentials. It is particularly advantageous for drivers engaged in racing, off-roading, or towing, where the demand on the vehicle's drivetrain is significantly increased. Moreover, users who regularly operate in extreme temperature conditions will appreciate the reliability and performance stability this synthetic oil provides, ensuring optimal functionality in various environments. -
Question:
How often should I change my gear oil using ULTRA 1PLUS?
Answer: The frequency of changing your gear oil with ULTRA 1PLUS depends on several factors, including driving habits, vehicle type, and conditions. For most standard applications, changing gear oil every 30,000 to 50,000 miles is recommended. However, for those who drive aggressively, haul heavy loads, or operate under harsh conditions, more frequent changes may be necessary. Regular inspection and adherence to manufacturer guidelines will help maintain optimal performance and prolong the life of your differential. -
Question:
Where can I buy ULTRA 1PLUS SAE 75W-90 Synthetic Limited Slip Gear Oil?
Answer: You can purchase ULTRA 1PLUS SAE 75W-90 Synthetic Limited Slip Gear Oil at Ubuy. Ubuy offers a convenient platform where you can find a variety of automotive products, including high-quality oils and lubricants, with reliable customer service and a user-friendly shopping experience. Be sure to check the availability and compatibility based on your vehicle's specifications to ensure you get the best product for your needs. -
Question:
What precautions should I take when using gear oil?
Answer: When using ULTRA 1PLUS gear oil, it is essential to follow safety precautions such as wearing gloves and goggles to avoid skin and eye contact. Ensure that you are working in a well-ventilated area, as oil fumes may cause discomfort. Additionally, properly dispose of any old gear oil to avoid environmental contamination. By taking these precautions, you ensure safe handling and help protect your health while maintaining your vehicle's performance.
ULTRA 1PLUS Gear Oils SAE 75W-90 Synthetic Gear Oil API GL-5 Editorial Review
The Ultralab 1Plus SAE 75W-90 GL-5 ultra full synthetic gear oil is a high-quality product that impresses customers with its excellent performance and protection for transmissions and transaxles. This product is synthetic and comes with the limited slip differential additive package ensuring superior protection against wear and tear, even in harsh conditions. Customers can easily mix this oil and use it in different applications, including differential and outboard lower units. It is compatible with other synthetic GL-5 gear oils. Customers who used this product noticed smoother and quieter transmission with an improved overall performance of the vehicles. The product is available in 1-quart pack of 12 or a 5-gallon pail, although a few customers complained about receiving single jugs instead of a 5-gallon pail advertised. Overall, the Ultralab 1Plus SAE 75W-90 GL-5 ultra full synthetic gear oil has received positive reviews from customers, and it appears to be an excellent product worth recommending.
Customer Reviews & Ratings
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Pros
- High-quality and fully synthetic gear oil.
- Comes with limited slip differential additive package.
- Superior protection against wear and tear, even in harsh conditions.
- Compatible with other synthetic GL-5 gear oils.
- Improves overall transmission performance of vehicles.
- Available in 1-quart pack of 12 or 5-gallon pail.
Cons
- A few customers received a different package than what was advertised resulting in additional work like cleaning.
Platform Trust & Buyer Confidence
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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23 July 2026 · via Trustpilot
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Features & Benefits
- Extended gear and bearing life due to minimal deposits.
- Contribution to reduced maintenance cost and longer equipment life.
- Helps to reduce operating costs.
- Contribution to reduced wear and ease of start up.
- Maintains film strength for reliable lubrication.
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