About this item

• Product Overview

  Use in API GL-5, hypoid gear applications that require higher-viscosity oil, including off-road race trucks, rock racers and crawlers, competition tractors, funny cars, dragsters and heavy equipment. Where limited-slip performance is required, use AMSOIL Slip Lock^® limited-slip additive.

  See the product data sheet for details.

  PROTECTS AGAINST WEAR

  • Extra-heavy treatment of additives and shear-stable, heavy synthetic base oils promote increased film strength for maximum wear protection.
  • Cushions metal surfaces and absorbs impact of moving parts.
  • Proprietary extreme-pressure additives form an iron-sulfide barrier on gear surfaces for the ultimate line of defense against wear, pitting and scoring.

  PROVIDES FAST PROTECTION

  • Does not contain waxes that solidify in the cold inherent to conventional oils, meaning it provides excellent fluidity despite its high viscosity to quickly reach gears and bearings at startup.
  • Superior fluidity reduces viscous drag and energy loss, helping drivers put maximum power to the ground.

  CLINGS TENACIOUSLY TO PARTS

  • Specifically engineered for high-horsepower, high-torque conditions where centrifugal gear lube sling-off is encountered.
  • Tenacious formulation clings to gears and bearings for maximum protection during shock loading, high G-forces and when ring and pinion gears are run at steep angles.
  • Provides excellent reliability and helps extend gear life.

  See the product data sheet for details.

  *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.

• Technical Specifications

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  SDS (French)

  
  
  

• Product Reviews

  5 star rating

  Based on 10 reviews

  Based on 10 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Fixed leaking shaft seal using correct oil
    By  THOMAS,  a  Verified Buyer  from  TN  on  August 07, 2026

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    Acquired a brushhog to use with my tractor. While using it I noticed a smell of oil. and after checking fluid level noticed it was down more than it should be. Looked under it and noticed the oil from the center shaft. Needing to finish cutting I put some 90 weight in and continued on. Tried to find a shaft seal to replace it and found that the particular gearbox was designed to run 250 weight. When the SAE250 Severe Gear I ordered came in I filled it up and started working. 5 days of cutting and no leak from the shaft. Amazing what happens when you use the correct oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Tough and thick stuff
    By  FABIEN,  a  Verified Buyer  on  January 09, 2026

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    Does what it needs to do. Good for extreme duty.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    SAE 250
    By  DUANE,  a  Verified Buyer  from  Oklahoma  on  April 23, 2023

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    used this in a 2016 TRD 4x4 Tundra 5.7 Supercharged 100,000 miles on the motor There are a number of other things I have done to the Engine,Exhaust, suppression. I have used other Amsoil product in the gear box on my 2016 Tundra with no problem. I just wanted to try the new SAE 250 I also used this product in my transfer case. The one thing I noticed is both front & Rear differential along with the Transfer case are a lot quitter. And by the way anything the gear grease touch it won't come off. Thank you Amsoil
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Good Stuff
    By  Paul,  a  Verified Buyer  from  Arkansas  on  April 07, 2022

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    I've used Amsoil Severe Gear in race cars for a long time and have never had a failure due to lubrication (and believe that this product has actually made differentials last longer than standard lubes would have). So, when the differential in my Kia Sorento began humming a tune I figured that Severe Gear might help make the costly repair a little further off in the future. It's been a couple of months now and the noise had dramatically diminished. I'm confident that my differential's life has been extended...maybe even saved.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Excellent for slingshot autodrive
    By  BRETT,  a  Verified Buyer  on  November 04, 2021

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    Works really great
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Severe gear SAE 250 review
    By  RICK,  a  Verified Buyer  from  Florida  on  April 02, 2021

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    I bought this to use in my paramotor gearbox and it really has made a huge difference. This is an amazing oil IMHO.
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Best oil for off road racing!
    By  TMR Customs Inc.,  a  Verified Buyer  from  Newmarket Ontario Canada  on  October 23, 2020

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    We switched to this oil at the recommendation of other pro off road racers. We've got confidence it'll extend the life of our ring and pinions under racing conditions!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great product
    By  Pepe,  a  Verified Buyer  from  Millet Alberta  on  October 27, 2018

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    Excellent product. Did exactly what I needed
    Bottom Line

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

    YES (1) NO (1)
  • 5 star rating
    Going to buy again
    By  Martin,  a  Verified Buyer  from  Hollister  on  October 10, 2017

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    Great stuff helps my harley shift smooth
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    Works great in my application.
    By  Bob K.,  a  Verified Buyer  from  Pa.  on  August 29, 2016

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    I am using this in my 79 Corvette differential. This is a Drag Race Car and I accelerate very quickly from the line. I am noticing no noise or excessive wear so far. Would highly recommend this product.
    Bottom Line

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

    YES (3) NO (0)

• Highlights

  • Premium-grade, extreme-pressure gear lube engineered specifically for high-load demands.
  • Shear stable in extreme temperatures.
  • Provides cushion between metal surfaces that absorbs impact to prevent pitting, scoring and wear.
  • Excellent for severe racing applications subject to shock loading, steep angles, high pinions, G-forces and lubricant sling-off.

• 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

  Use in API GL-5, hypoid gear applications that require higher-viscosity oil, including off-road race trucks, rock racers and crawlers, competition tractors, funny cars, dragsters and heavy equipment. Where limited-slip performance is required, use AMSOIL Slip Lock^® limited-slip additive.

  See the product data sheet for details.

  PROTECTS AGAINST WEAR

  • Extra-heavy treatment of additives and shear-stable, heavy synthetic base oils promote increased film strength for maximum wear protection.
  • Cushions metal surfaces and absorbs impact of moving parts.
  • Proprietary extreme-pressure additives form an iron-sulfide barrier on gear surfaces for the ultimate line of defense against wear, pitting and scoring.

  PROVIDES FAST PROTECTION

  • Does not contain waxes that solidify in the cold inherent to conventional oils, meaning it provides excellent fluidity despite its high viscosity to quickly reach gears and bearings at startup.
  • Superior fluidity reduces viscous drag and energy loss, helping drivers put maximum power to the ground.

  CLINGS TENACIOUSLY TO PARTS

  • Specifically engineered for high-horsepower, high-torque conditions where centrifugal gear lube sling-off is encountered.
  • Tenacious formulation clings to gears and bearings for maximum protection during shock loading, high G-forces and when ring and pinion gears are run at steep angles.
  • Provides excellent reliability and helps extend gear life.

  See the product data sheet for details.

  *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.

• Technical Specifications

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  SDS (French)

  
  
  

• Product Reviews

  5 star rating

  Based on 10 reviews

  Based on 10 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Fixed leaking shaft seal using correct oil
    By  THOMAS,  a  Verified Buyer  from  TN  on  August 07, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Acquired a brushhog to use with my tractor. While using it I noticed a smell of oil. and after checking fluid level noticed it was down more than it should be. Looked under it and noticed the oil from the center shaft. Needing to finish cutting I put some 90 weight in and continued on. Tried to find a shaft seal to replace it and found that the particular gearbox was designed to run 250 weight. When the SAE250 Severe Gear I ordered came in I filled it up and started working. 5 days of cutting and no leak from the shaft. Amazing what happens when you use the correct oil.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Tough and thick stuff
    By  FABIEN,  a  Verified Buyer  on  January 09, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Does what it needs to do. Good for extreme duty.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    SAE 250
    By  DUANE,  a  Verified Buyer  from  Oklahoma  on  April 23, 2023

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    used this in a 2016 TRD 4x4 Tundra 5.7 Supercharged 100,000 miles on the motor There are a number of other things I have done to the Engine,Exhaust, suppression. I have used other Amsoil product in the gear box on my 2016 Tundra with no problem. I just wanted to try the new SAE 250 I also used this product in my transfer case. The one thing I noticed is both front & Rear differential along with the Transfer case are a lot quitter. And by the way anything the gear grease touch it won't come off. Thank you Amsoil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Good Stuff
    By  Paul,  a  Verified Buyer  from  Arkansas  on  April 07, 2022

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I've used Amsoil Severe Gear in race cars for a long time and have never had a failure due to lubrication (and believe that this product has actually made differentials last longer than standard lubes would have). So, when the differential in my Kia Sorento began humming a tune I figured that Severe Gear might help make the costly repair a little further off in the future. It's been a couple of months now and the noise had dramatically diminished. I'm confident that my differential's life has been extended...maybe even saved.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Excellent for slingshot autodrive
    By  BRETT,  a  Verified Buyer  on  November 04, 2021

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Works really great
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Severe gear SAE 250 review
    By  RICK,  a  Verified Buyer  from  Florida  on  April 02, 2021

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I bought this to use in my paramotor gearbox and it really has made a huge difference. This is an amazing oil IMHO.
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Best oil for off road racing!
    By  TMR Customs Inc.,  a  Verified Buyer  from  Newmarket Ontario Canada  on  October 23, 2020

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    We switched to this oil at the recommendation of other pro off road racers. We've got confidence it'll extend the life of our ring and pinions under racing conditions!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Great product
    By  Pepe,  a  Verified Buyer  from  Millet Alberta  on  October 27, 2018

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Excellent product. Did exactly what I needed
    Bottom Line

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

    YES (1) NO (1)
  • 5 star rating
    Going to buy again
    By  Martin,  a  Verified Buyer  from  Hollister  on  October 10, 2017

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great stuff helps my harley shift smooth
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    Works great in my application.
    By  Bob K.,  a  Verified Buyer  from  Pa.  on  August 29, 2016

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I am using this in my 79 Corvette differential. This is a Drag Race Car and I accelerate very quickly from the line. I am noticing no noise or excessive wear so far. Would highly recommend this product.
    Bottom Line

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

    YES (3) NO (0)