Yukon YG F9.75-355-11 Ring & Pinion 3.55 for 2011-Up Ford 9.75 31-Spline Rear

Vehicle Fitment

• 2011-2023 Ford F-150 (RWD/4WD, All Engines, Ford 9.75" Rear Differential)
• 2010-2014 Ford F-150 Raptor (4WD, 6.2L V8, Ford 9.75" Rear Differential)
• 2011-2019 Ford Expedition (RWD/4WD, 3.5L EcoBoost V6 / 5.4L V8, Ford 9.75" Rear Differential - equipped trims only)
• 2011-2019 Ford Expedition EL / Max (RWD/4WD, 3.5L EcoBoost V6 / 5.4L V8, Ford 9.75" Rear Differential - equipped trims only)
• 2003-2014 Ford E-150 (Ford 9.75" Rear Differential)
• 2015-2017 Ford Transit-150 / Transit-250 / Transit-350 (Ford 9.75" Rear Differential)
• 2006-2014 Lincoln Mark LT (RWD/4WD, Ford 9.75" Rear Differential)
• 2011-2019 Lincoln Navigator (RWD/4WD, Ford 9.75" Rear Differential - equipped trims only)

Fitment Notes

• Designed specifically for 2011 and newer Ford 9.75" rear differentials - this is NOT the same as the pre-2011 version; internal bearing dimensions changed in 2011
• This gear set can also be installed in 2010-and-older Ford 9.75" applications with a conversion bearing kit and crush sleeve - verify compatibility before ordering
• The Ford 9.75" rear differential is not standard across all F-150 and Expedition trims - confirm your axle size (12-bolt cover = 9.75"; 10-bolt cover = 8.8") before purchasing
• Not compatible with the Ford 8.8" or 10.5" Sterling rear differentials
• Professional installation required - proper gear setup demands specialized tools and precise preload and backlash measurements

Features

• High-grade steel construction in both ring and pinion for superior strength under towing, hauling, and off-road conditions
• Precision-engineered gear tooth surface finish reduces friction and heat during sustained high-torque operation
• Built to OEM dimensional tolerances for the 2011-and-up Ford 9.75" housing for accurate, consistent fit
• Advanced heat-treating process hardens gear surfaces for improved wear resistance and long-term shear strength
• Validated through two in-house Yukon quality labs for dimensional accuracy and metallurgical integrity
• 3.55 ratio provides a strong balance of towing torque and daily highway driveability - ideal for mild tire upgrades
• Quiet operation achieved through precision tooth geometry and tight manufacturing tolerances
• Backed by Yukon's Y.E.S. Plan - lifetime no-questions-asked coverage for as long as you own the vehicle

Specifications

• Part Number: YG F9.75-355-11
• Gear Ratio: 3.55
• Ring Gear Diameter: 9.75"
• Ring Gear Bolt Count: 12
• Pinion Spline Count: 31
• Differential Application: Ford 9.75" Rear (2011 and Newer Design)
• Axle Type: Semi-Float
• Position: Rear Axle

Included Components

• 1x Ring Gear
• 1x Pinion Gear

Product Description

The Yukon YG F9.75-355-11 is a high-performance ring and pinion gear set engineered specifically for the 2011-and-newer Ford 9.75" rear differential. Ford revised the internal bearing design on the 9.75" axle starting with the 2011 model year, making this gear set non-interchangeable with pre-2011 versions without a conversion bearing kit. The 3.55 ratio is a popular re-gear choice for F-150, Expedition, and Navigator owners who have upsized their tires or are looking to restore powertrain response and towing efficiency lost from running a numerically lower factory ratio.

Yukon engineers this gear set using high-grade steel with a precision-finished tooth profile that minimizes friction and heat during extended high-load driving. Each set is manufactured to OEM dimensional specs for a reliable, accurate fit within the 2011-up Ford 9.75" housing. Note that the Ford 9.75" rear differential is not fitted to every F-150 or Expedition variant - the 9.75" uses a 12-bolt cover, while the smaller 8.8" uses a 10-bolt cover. Always confirm your axle size by counting cover bolts or measuring the ring gear before ordering.

This gear set fits the 2011-2023 Ford F-150 (all engines, RWD/4WD), F-150 Raptor, Ford Expedition and Expedition Max/EL, E-150, Transit-150/250/350 (2015-2017), Lincoln Mark LT, and Lincoln Navigator on equipped trims. It can also be used in 2010-and-older Ford 9.75" vehicles with the appropriate conversion bearing kit and crush sleeve. Professional installation with specialized differential setup tools is strongly recommended. Pair with a compatible Yukon master overhaul kit for a complete rebuild.