AMSOIL SEVERE GEAR 100% Synthetic Extreme-Pressure Gear Lube 75W-90
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SEVERE GEAR 75W-90 Synthetic EP Gear Lube
AMSOIL SEVERE GEAR 75W-90 is the most popular viscosity in the SEVERE GEAR lineup, covering the broadest range of differential and manual transmission applications. It maintains its viscosity for long-lasting protection against metal-to-metal contact under the most demanding conditions including towing, hauling and off-road use.
Key Benefits
- Advanced protection against wear, pitting and scoring
- Controls thermal runaway under high-stress conditions
- Protects against rust and corrosion
- Helps reduce operating temperatures
- Maximum efficiency with wax-free cold-flow properties
- 100,000-mile normal service life in cars, SUVs and light trucks
- Up to 250,000 miles in heavy-duty Class 8 line haul
- Flexible Easy-Pack for clean, fast installation
Severe-Duty Performance
SEVERE GEAR helps prevent thermal runaway — a phenomenon caused by a lubricant's inability to control friction and increased heat under high-stress conditions. Its wax-free construction improves cold-flow properties, improving fuel economy and cold-weather shifting.
Service life: 100,000 miles normal service or 50,000 miles severe service in cars, SUVs and light trucks. Up to 250,000 miles in heavy-duty Class 8 line haul.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 16.0 |
| Kinematic Viscosity @ 40°C, cSt | 97.8 |
| Viscosity Index | 175 |
| Brookfield Viscosity, cP | 61,940 @ -40°C |
| Flash Point | 222°C (431.6°F) |
| Pour Point | -43°C (-45°F) |
| Copper Corrosion @ 121°C, 3 hr | 1b |
| Foam Stability (Seq. I, II, III), ml | 0/0, 10/0, 0/0 |
Industry Certifications & OEM Approvals
API
- GL-5, MT-1
Military
- MIL-PRF-2105E
Dana
- SHAES 234 (Formerly Eaton PS-037)
Mack
- GO-J
Applications & Specifications
Use in differentials, manual transmissions and other gear applications requiring: API GL-5, MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037), Mack GO-J or other GL-5 based specifications from Ford, GM and Chrysler. Can also be used in axles where an API GL-4 lubricant is recommended.
Pros and Cons
Pros
- Advanced protection against wear, pitting and scoring
- Controls thermal runaway under high-stress conditions
- Protects against rust and corrosion
- Helps reduce operating temperatures
- Maximum efficiency with wax-free cold-flow properties
- 100,000-mile normal service life in cars, SUVs and light trucks
- Up to 250,000 miles in heavy-duty Class 8 line haul
- Flexible Easy-Pack for clean, fast installation
Cons
- Premium Investment: Higher initial cost compared to conventional or "shelf-brand" synthetic oils.
- Limited Local Retail: Primarily available through authorized dealers and specialized synthetic outlets. National Synthetics is a local stocking dealer. Call 1-678-944-8816 to confirm in-stock items for same-day local pickup.
Order Through Your Independent AMSOIL Dealer
Get severe-duty protection for your differential and drivetrain. As your Independent AMSOIL Dealer, we provide expert guidance and competitive pricing on all AMSOIL products.
Independent AMSOIL Dealer #1858536
Frequently Asked Questions
Yes. SEVERE GEAR is specifically formulated for severe applications including towing, hauling, steep-hill driving, commercial use, plowing, racing and off-road use. It controls thermal runaway to protect gears under extreme loads.
In cars, SUVs and light trucks: 100,000 miles normal service or 50,000 miles severe service. Heavy-duty Class 8 line haul: up to 250,000 miles or three years. Vocational/delivery: up to 120,000 miles or three years.
Yes. AMSOIL SEVERE GEAR 75W-90 can also be used in axles where an API GL-4 lubricant is recommended.
Customer Reviews
See all 1,107 reviewsRear diff oil
Great oil products at very good price
Great product!
I used this for my Tacoma, and honestly, I bought this because I heard good things about this brand. It was pretty feasible to empty it out. I don’t exactly feel a difference, but I will write a review later when I have to change my differential oil again. I did come across a problem with one of the packs. I believe it was just a defect, but one of them kept on leaking when I tried to empty out the oil. I changed the cap with one of the other packets but it kept leaking. I ended up wasting a lot of oil of that packet. I haven’t changed but front differential oil due to a stripped bolt, but hopefully I’ll have enough once I change it.
Upgrade from Anything
I am about to embark on a cross country journey with my wife to camp, hike and 4Wheel the U.S. and I knew there was only one brand I wanted to trust from past experience so I came to Amsoil and luckily I found this which has a better viscosity and I know I will be good--- with a few more changes during my few hundred k travels.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.