About this item

• Product Overview

  SEVERE GEAR is designed for those who demand the best. Engineered with high film strength for high-load demands. Reduces friction and provides the ultimate protection against wear. Excels in extreme temperatures. Helps maintain efficiency and outperforms conventional gear oils. Excellent for all cars and trucks, but especially well-suited for towing, hauling, racing, commercial use or other severe duty.

  See the product data sheet for full details.

  EXCELS IN TEMPERATURE EXTREMES

  • Delivers excellent performance in hot and cold temperature extremes.
  • Resists breakdown from high heat, preventing acids and carbon/varnish formation.
  • Wax-free construction improves cold-flow properties, improving fuel economy and cold-weather shifting.

  ---

  MAXIMUM WEAR PROTECTION

  • Specifically engineered for maximum performance in severe-duty applications.
  • Maintains viscosity for long-lasting protection against metal-to-metal contact.
  • Proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
  • Helps prevent "thermal runaway," a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions.
  • Inhibits rapid lubricant degradation and component damage, helping equipment run better and last longer.

  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

  See the product data sheet for full details.

  Download Transcript >

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 1,189 reviews

  Based on 1,189 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Good quality rear differential fluid
    By  RICHARD,  a  Verified Buyer  from  Florida   on  September 18, 2026

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    AMSOIL products are the best y I y can buy. Been a advocate user for 40 yrs. The squeeze bottle application is a guaranteed no mess use.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Front differential
    By  CHARLES,  a  Verified Buyer  from  Liberty Missouri   on  September 17, 2026

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    This oil surpasses manufacturer specs. I'm picky so I use Amzoil
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 4 star rating
    Rear differential oil
    By  CHARLES,  a  Verified Buyer  from  Liberty Missouri   on  September 17, 2026

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    This product surpasses the manufacturer specs. It will work well in my Chevrolet 3500
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Gear Insurance
    By  GERARDO,  a  Verified Buyer  from  Florida   on  September 17, 2026

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    This is well put together, gear oil is the longevity of the load. It’s insurance for the long haul. Again!! Keep the same formula, don’t mess up what you have going strong.
    Was this review helpful?

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  • 5 star rating
    Easy to use
    By  STEVEN,  a  Verified Buyer  from  South Carolina   on  September 15, 2026

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    First time I used the squeeze bags, made filling both differentials a breeze. My truck now runs solely on AMSOIL products.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

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    I am very pleased with the results gained by the use of this great product in both front and rear differentials and give it my highest recommendation!
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Good as it gets
    By  SCOTT,  a  Verified Buyer  on  September 13, 2026

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    Love this stuff this is the second truck I used this gear oil I am pleased with the performance
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    SAE75W-140 Severe Gear Oil
    By  WILLIAM,  a  Verified Buyer  from  Delaware  on  September 08, 2026

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    My 15yo grandson recently purchased a 2000 Jeep Wrangler as his project vehicle in anticipation of getting his driver's license when he turns 16. He and I are methodically performing maintenance and changing all fluids to AMSOIL products throught out the vehicle. I believe this will be the best approach to giving him a head start as I hope he follows my lead in the future by continuously buying AMSOIL products.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    OEM alternative and then some
    By  RAFAEL,  a  Verified Buyer  from  Texas  on  September 05, 2026

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    Used amsoil on my diffs both front and rear with additive in rear only and haven’t experienced any funny business. By the way amsoil meets and exceeds oem.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  GARY,  a  Verified Buyer  on  August 23, 2026

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    I have used a lot of different oils and I'll have to say amsoil is the best in Quality and price.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)

• Highlights

  • Advanced protection against wear
  • Controls thermal runaway
  • Protects against rust and corrosion
  • Helps reduce operating temperatures
  • Long oil, seal & equipment life
  • Contains friction modifiers for limited-slip applications
• Returns

  We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.

• Payments

  We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.

• Product Overview

  SEVERE GEAR is designed for those who demand the best. Engineered with high film strength for high-load demands. Reduces friction and provides the ultimate protection against wear. Excels in extreme temperatures. Helps maintain efficiency and outperforms conventional gear oils. Excellent for all cars and trucks, but especially well-suited for towing, hauling, racing, commercial use or other severe duty.

  See the product data sheet for full details.

  EXCELS IN TEMPERATURE EXTREMES

  • Delivers excellent performance in hot and cold temperature extremes.
  • Resists breakdown from high heat, preventing acids and carbon/varnish formation.
  • Wax-free construction improves cold-flow properties, improving fuel economy and cold-weather shifting.

  ---

  MAXIMUM WEAR PROTECTION

  • Specifically engineered for maximum performance in severe-duty applications.
  • Maintains viscosity for long-lasting protection against metal-to-metal contact.
  • Proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
  • Helps prevent "thermal runaway," a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions.
  • Inhibits rapid lubricant degradation and component damage, helping equipment run better and last longer.

  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

  See the product data sheet for full details.

  Download Transcript >

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 1,189 reviews

  Based on 1,189 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Good quality rear differential fluid
    By  RICHARD,  a  Verified Buyer  from  Florida   on  September 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    AMSOIL products are the best y I y can buy. Been a advocate user for 40 yrs. The squeeze bottle application is a guaranteed no mess use.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Front differential
    By  CHARLES,  a  Verified Buyer  from  Liberty Missouri   on  September 17, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This oil surpasses manufacturer specs. I'm picky so I use Amzoil
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 4 star rating
    Rear differential oil
    By  CHARLES,  a  Verified Buyer  from  Liberty Missouri   on  September 17, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This product surpasses the manufacturer specs. It will work well in my Chevrolet 3500
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Gear Insurance
    By  GERARDO,  a  Verified Buyer  from  Florida   on  September 17, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This is well put together, gear oil is the longevity of the load. It’s insurance for the long haul. Again!! Keep the same formula, don’t mess up what you have going strong.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Easy to use
    By  STEVEN,  a  Verified Buyer  from  South Carolina   on  September 15, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    First time I used the squeeze bags, made filling both differentials a breeze. My truck now runs solely on AMSOIL products.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    The very finest
    By  MILAN,  a  Verified Buyer  from  Brighton, MI  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I am very pleased with the results gained by the use of this great product in both front and rear differentials and give it my highest recommendation!
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Good as it gets
    By  SCOTT,  a  Verified Buyer  on  September 13, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Love this stuff this is the second truck I used this gear oil I am pleased with the performance
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    SAE75W-140 Severe Gear Oil
    By  WILLIAM,  a  Verified Buyer  from  Delaware  on  September 08, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 15yo grandson recently purchased a 2000 Jeep Wrangler as his project vehicle in anticipation of getting his driver's license when he turns 16. He and I are methodically performing maintenance and changing all fluids to AMSOIL products throught out the vehicle. I believe this will be the best approach to giving him a head start as I hope he follows my lead in the future by continuously buying AMSOIL products.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    OEM alternative and then some
    By  RAFAEL,  a  Verified Buyer  from  Texas  on  September 05, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Used amsoil on my diffs both front and rear with additive in rear only and haven’t experienced any funny business. By the way amsoil meets and exceeds oem.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  GARY,  a  Verified Buyer  on  August 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have used a lot of different oils and I'll have to say amsoil is the best in Quality and price.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)