Answers to all your Gear & Axle questions.
TECHNICAL RESOURCES
Differential Repair – Technical & Installation Help
Differential Repair topics including How to Identify your Differential, Select the ideal Ring and Pinion gear ratio, Install or Repair your Differential, Check your gear pattern and more!
Find a Dealer
Find the application and ratio you need? Locate a Sierra Gear & Axle Distributor near you.
Gear Calculator
Doing a gear ratio change but not sure what you want? Try our Differential Gear Calculator.