Yukon Gear Steel Spool For Dana 80 w/ 35 Spline Axles / 4.10+ YP FSD80-4-35

Yukon Gear Steel Spool — Dana 80, 35-Spline (4.10 & Up) Part #: YP FSD80-4-35

If you need absolute, no-compromise traction from your rear axle, this Yukon full steel spool is built for the job. Made for Dana 80 rear housings with 35-spline axle shafts and 4.10 gear ratios (and higher), it replaces the differential carrier with a solid spool so both wheels turn together — perfect for drag cars, rock rigs, mud trucks and other high-torque builds.

This spool is precision-machined from heat-treated steel for long life under heavy loads. It comes in a bare steel finish, features 12 mounting holes, and is a performance-grade part meant to stand up to hard use. Because it permanently locks the axles, it’s intended for off-road or competition use rather than everyday street driving.

Key details

• Fitment: Dana 80 rear axle
• Spline: 35 splines
• Gear compatibility: 4.10 and up
• Material: Heat-treated steel (performance grade)
• Mounting holes: 12
• Finish: Bare steel
• California Prop 65: Not applicable

Why choose it

• Delivers predictable, maximum traction by locking both rear wheels together
• Built to withstand high horsepower and heavy towing or off-road punishment
• Far stronger and simpler than many limited-slip or worn OEM carriers

Notes 

This is a full spool (permanent lock). It’s an excellent choice for competition and serious off-road use but will affect turning behavior on pavement and increase drivetrain stress if used daily. If you want, I can also draft a short installation note or a simple fitment checklist for your product listing.