AMSOIL SEVERE GEAR 100% Synthetic Extreme-Pressure Gear Lube 75W-140
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SEVERE GEAR 75W-140 Synthetic EP Gear Lube
AMSOIL SEVERE GEAR 75W-140 delivers maximum film strength for the most demanding differential and gear applications. With the highest viscosity in the SEVERE GEAR lineup, it provides superior protection under extreme loads, heavy towing and the harshest operating conditions.
Key Benefits
- Maximum film strength for the most demanding applications
- Highest viscosity index (186) in the SEVERE GEAR lineup
- Controls thermal runaway under high-stress conditions
- Advanced protection against wear, pitting and scoring
- Protects against rust and corrosion
- Helps reduce operating temperatures
- 100,000-mile normal service life in cars, SUVs and light trucks
- Flexible Easy-Pack for clean, fast installation
Maximum Protection
SEVERE GEAR 75W-140 features a viscosity index of 186 — the highest in the lineup — maintaining its protective film across the widest temperature range. It helps prevent thermal runaway, inhibiting rapid lubricant degradation and component damage under high-stress conditions.
Service life: 100,000 miles normal service or 50,000 miles severe service in cars, SUVs and light trucks.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 25.9 |
| Kinematic Viscosity @ 40°C, cSt | 172.1 |
| Viscosity Index | 186 |
| Brookfield Viscosity, cP | 109,000 @ -40°C |
| Flash Point | 216°C (420.8°F) |
| Pour Point | -43°C (-45°F) |
| Copper Corrosion @ 121°C, 3 hr | 1b |
| Foam Stability (Seq. I, II, III), ml | 0/0, 20/0, 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
- Maximum film strength for the most demanding applications
- Highest viscosity index (186) in the SEVERE GEAR lineup
- Controls thermal runaway under high-stress conditions
- Advanced protection against wear, pitting and scoring
- Protects against rust and corrosion
- Helps reduce operating temperatures
- 100,000-mile normal service life in cars, SUVs and light trucks
- 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 maximum protection for your most demanding gear applications. As your Independent AMSOIL Dealer, we provide expert guidance and competitive pricing on all AMSOIL products.
Independent AMSOIL Dealer #1858536
Shipping & Returns
Fast, Reliable Shipping
- Free standard ground shipping on orders of $100 ($130 in Canada) or more.
- Orders under the threshold ship for a flat $9.99 ($12.99 in Canada) freight charge.
- In-stock items typically delivered in two to three business days.
- U.S. and Canada only — no shipments to PO Boxes.
30-Day Return Policy
- Return unopened, currently marketed products within 30 days for a full refund (minus freight).
- Exchange unopened products within 90 days with no restocking fee.
- Special-order items are non-returnable.
- Returns are handled directly by AMSOIL.
Frequently Asked Questions
Use 75W-140 when your application requires the maximum film strength available, such as heavy towing, racing, or when the OEM specifies a 75W-140 grade. It provides the thickest protective film in the SEVERE GEAR lineup.
Yes. SEVERE GEAR 75W-140 is specifically formulated for the most demanding applications including heavy towing, hauling, racing and commercial use. Its maximum film strength protects differentials under extreme loads.
Customer Reviews
See all 1,117 reviewsGear Oil
Been using nothing but AMSOIL products for my vehicle and I must say very impressed and happy with my purchase I believe I’m all their products and so should you to protect your vehicles. I just recently bought this gear oil and I love it.
Superior quality compared to other synthetic gear lubes
I've been using Amsoil Severe Gear for years in all my equipment including my previous HTM 850 HP Boat. I used 75W-110 in my Bravo 1 OD and never had a problem. Sure you can find various brands of synthetic oil going to chain stores or auto parts stores but none offer the proven protection of Amsoil products IMHO.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.