Spider-Differential 3278Q381

positive OEM
Meritor
Part# 3278Q381
note
Internal differential gear enabling torque transfer and wheel speed variation.
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Description

The Meritor Genuine Spider Differential Gear (3278Q381) is an internal component within heavy-duty axle differentials that transmits torque to side gears while allowing wheel speed differentiation. It is engineered to maintain gear tooth integrity under high torque and repeated load conditions, supporting smooth power transfer and drivetrain stability in demanding vehicle applications.

Key Specifications

  • Application: Heavy-duty trucks, construction, utility vehicles
  • Function: Torque transmission and wheel speed differentiation
  • Compatibility: Differential carrier model SPR570
  • Construction: High-strength alloy steel, heat treated
  • Features: Precision tooth geometry, reduced contact stress, controlled grain flow
  • Quality: OEM Meritor part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# 3278Q381
Type OEM
Part# variations TDA 3278Q381,
TDA3278Q381
Manufacturer Meritor
Warranty Standard Manufacturer Warranty