Drivetrain Differentials and Rear-End Components

Yukon Gear & Axle

Yukon Dropout Assembly for Ford 9" Diff w/Trac-Lok LSD, 31 Spline, 3.70 Ratio

$1,606.89

SKU: Y001 YDAF9-370SVO-31

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: YDAF9-370SVO-31

Yukon dropout assemblies are built by expert Yukon technicians and come complete, properly shimmed and backlashed to spec. All you do is install the third member into your diff housing, bolt on the diff cover, add fluid, and roll. This unit features a nodular iron case which improves rigidity and power handling, reducing deflection for consistent gear contact and a long service life. This assembly is upgraded with a Trac-Loc limited slip differential that improves torque bias and traction for maximum performance.

Features:

  • Fits Ford 9" differential
  • Complete, fully assembled dropout
  • 3.70 gear ratio
  • 31 spline
  • Upgraded with Trac-Lok clutch-type limited slip differential
  • Does not include yoke

Yukon dropout assemblies are built by expert Yukon techs, come fully shimmed, backlashed to spec, and ready to install. This unit is upgraded with a Trac-Loc clutch-type limited slip differential for maximum performance and reliability.

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

This Yukon dropout assembly is a complete, pre-assembled unit built by expert Yukon technicians. It is fully shimmed, backlashed, and ready for installation in a Ford 9" differential. It features a nodular iron case for enhanced rigidity, power handling, and reduced deflection, promoting consistent gear contact and extended service life. The assembly is upgraded with a Trac-Lok clutch-type limited-slip differential (LSD) for improved torque bias and traction. It has a 3.70 gear ratio and is designed for 31-spline axles. Yoke is not included.

Fitment

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Specifications

BrandYukon Gear & Axle
Part NumberY001 YDAF9-370SVO-31

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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