AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube - Quart Easy-Pack Pouch

AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube is a premium full synthetic gear oil engineered for differentials, manual transmissions, and drivetrain components operating under high load, extreme temperatures, and severe-duty conditions. AMSOIL positions it for towing, hauling, racing, commercial use, off-road use, rapid acceleration, stop-and-go operation, and high ambient temperatures.

Designed to reduce friction, protect against wear, and maintain performance under heavy stress, SEVERE GEAR® 75W-90 delivers strong film strength, helps control thermal runaway, protects against rust and corrosion, and helps reduce operating temperatures. AMSOIL also says it contains friction modifiers for limited-slip applications.

Built for severe-duty street, off-road, and performance use, this gear lube is ideal for customers who want a premium 75W-90 for demanding drivetrain service.

Performance tier

Top tier – severe duty / street / performance

Developed for heavy-load, high-heat, and severe-duty applications where drivetrain protection, wear control, and temperature stability are critical.

Variants

75w-90 – quart easy-pack pouch
Best for cleaner, faster installs with less mess
Ideal for transmission and differential service where fill access is tight

Features

100% synthetic gear lube
Advanced protection against wear
Controls thermal runaway
Protects against rust and corrosion
Helps reduce operating temperatures
Long oil, seal, and equipment life
Contains friction modifiers for limited-slip applications
Flexible easy-pack for clean, fast installation 

Fitment

Manual transmissions
Differentials
Limited-slip differential applications
Street, racing, and severe-duty drivetrain use

Compatible with applications requiring 75w-90 gear lube and specifications including API GL-5, MT-1, MIL-PRF-2105E, Dana SHAES 234, and Mack GO-J. AMSOIL also says it can be used in axles where an API GL-4 lubricant is recommended and is compatible with most limited-slip differentials.

Specifications

Type: 100% synthetic gear lube
Viscosity: 75w-90
Product code: SVGPK-EA
Available size in this listing: quart easy-pack pouch
Volume: 1 U.S. quart / 946 mL
Kinematic viscosity @ 100°C: 16.0 cSt
Kinematic viscosity @ 40°C: 97.8 cSt
Viscosity index: 175
Brookfield viscosity: 61,940 cP @ -40°C
Flash point: 222°C / 431.6°F
Pour point: -43°C / -45°F
Copper corrosion: 1b
Brand: AMSOIL 

For differential service life, AMSOIL says to follow the owner’s manual or OEM guidance to determine normal or severe service.

Note

AMSOIL says mixing this gear oil with other oils will shorten oil life and reduce performance benefits. For applications that require additional limited-slip friction modifier, AMSOIL recommends Slip Lock®.

Not sure what to run? message us and we’ll recommend the right setup for your build

Recommended pairings

AMSOIL DOMINATOR® racing oil
AMSOIL Signature Series motor oil
AMSOIL Slip Lock®
AMSOIL brake fluid