The Yukon Gear Dura Grip (YDGF8.8-31-1) is a high-performance positraction limited slip differential (LSD) designed for select 1975-2017 Ford, Lincoln, Mercury, and Mazda vehicles equipped with the 8.8-inch rear end and 31-spline axles. This unit provides smooth yet aggressive traction, effectively eliminating the "one-wheel-peel" common in open differentials while maintaining better street drivability and lower noise than a mechanical locker. Whether you are building a street car, a tow rig, or an off-road project, the Dura Grip provides the confidence of 2-wheel traction across varied terrain.

Built for long-term durability and high-torque applications, the Dura Grip features a high-strength nodular iron case and forged 4320 chromoly spider gears. Internal composite clutches offer a long service life and predictable engagement. Unlike many factory limited-slip units, the Dura Grip is fully rebuildable, ensuring you can maintain peak performance without replacing the entire carrier.

• Manufacturer Part Number: YDGF8.8-31-1
• Differential Fitment: Ford 8.8-inch
• Axle Spline Count: 31-Spline
• Gear Ratio Compatibility: Fits all ratios
• Spider Gear Material: Forged 4320 chromoly
• Case Material: High-strength nodular iron
• Clutch Type: Internal composite clutches
• Maintenance: Fully rebuildable design
• Origin: Assembled in the USA

Fits select 1975-2011 Ford, Lincoln, and Mercury vehicles with the Ford 8.8-inch rear end and 28-spline axles.

The Yukon Dura Grip is a premium positraction limited slip differential designed to provide smooth, dependable traction across various terrains. Whether you are upgrading a street car or a light-duty truck, the Dura Grip delivers an aggressive lock-up when you need it without the harshness of a mechanical locker. This unit is engineered for longevity and is fully rebuildable, ensuring your drivetrain remains serviceable for the long haul.

Construction features a high-strength nodular iron case to resist deflection under load and internal 4320 chromoly spider gears for maximum tooth strength. The system utilizes high-quality composite clutches for consistent performance and chatter-free operation. Every unit undergoes rigorous testing and is assembled in the USA.

• Manufacturer Part Number: YDGF8.8-28-1
• Fits Ford 8.8" rear differentials with 28-spline axles
• Compatible with all gear ratios
• Internal Gears: Forged 4320 chromoly
• Case Material: High-strength nodular iron
• Clutch Style: Composite clutches
• Design: Fully rebuildable internal components
• Assembled in the USA

Fits select 2007-2018 Dodge and Ram 2500/3500 trucks (68RFE transmission).

The BD Diesel Stage 4 Master Build-It Rebuild Kit provides the same heavy-duty components used in BD’s own high-performance transmissions. This comprehensive kit is engineered to solve common 68RFE failure points by increasing clutch capacity and hydraulic apply pressure. It includes durable QT100 pressure plates that allow for increased clutch counts while reducing deflection and distortion within the clutch drum. For maximum rigidity, the kit features stiffer billet intermediate and Overdrive/Reverse reaction plates.

The included ProTect68 Pressure Control module dynamically adjusts hydraulic apply pressures based on engine load and turbo boost, delivering up to 250 psi at full throttle—an 80% increase over the stock unit. This increase in pressure, combined with a 17% increase in Overdrive clutch capacity and a 20% increase in Underdrive capacity, ensures reliable torque holding for towing and performance applications.

• Manufacturer Part Number: 1062025
• Delivers up to 250 psi clutch apply pressure
• Custom bonded gasket valve body separator plate to stop internal cross leaks
• Raybestos friction materials for 2C, 4C, Overdrive, and Reverse clutches
• Heavy-duty accumulator plate to prevent blowout
• Upgraded heavy-duty one-way clutch/sprag
• Includes billet 4C spring retaining ring and pump cover
• Complete overhaul gasket kit with solenoid pack connector and output shaft seals
• Pan and spin-on filters included
• 12-Month / 12,000-Mile Warranty

Fits 2004-2021 Subaru WRX STI and Impreza WRX STI models.

The ACT T2S-S07 Mod-Twin 225 XT Rigid Street Kit is engineered for high-output AWD applications that demand massive torque capacity without the harsh engagement typically found in race clutches. This modular twin-disc system doubles the organic friction surface area to handle up to 875 ft/lbs of torque while maintaining a smooth pedal feel and positive engagement. The heart of this kit is the rigid Mono-Drive hub, precision-machined from chrome-moly steel and heat-treated to ensure a continuous spline contact, which protects your transmission's input shaft and enables lightning-fast shifts.

• Manufacturer Part Number: T2S-S07
• Torque Capacity: 875 ft/lbs
• Clutch Type: Mod-Twin 225 XT Rigid Street
• Materials: Steel-backed organic friction plates and chrome-moly hub
• Construction: 4-stage heat-treated diaphragm spring and CNC-machined components
• Rebuildable: Fully modular design allows for individual component replacement

This comprehensive kit includes a dynamically balanced flywheel, pressure plate cover, diaphragm spring, organic friction plates, rigid Mono-Drive hub, floater, ACT's patented Monoloc Collar, release bearing, alignment tool, and pilot bearing.

Fits select 2004-2021 Subaru Impreza WRX STI and WRX STI models.

The ACT T2S-S05 Mod-Twin 225 XT Sprung Street Kit is engineered for high-powered, All-Wheel Drive street applications that require massive torque capacity without sacrificing drivability. By utilizing a modular design with double the organic friction surface area, this kit provides a stable friction coefficient and excellent heat capacity for long-term durability. The exclusive four-stage heat-treating process applied to the diaphragm spring ensures a consistent, light pedal feel, while the patented Monoloc Collar ensures the release bearing remains securely in place during high-RPM operation.

The heart of this system is the ultra-durable Mono-Drive hub. This sprung assembly is designed to reduce driveline shock and dampen torsional vibrations, protecting your input shaft and transmission. Fully rebuildable, the Mod-Twin series allows for individual component replacement, making it a sustainable long-term solution for modified STI builds.

• Torque Capacity: 875 ft/lbs
• Hub Style: Sprung Mono-Drive
• Disc Material: Organic friction surfaces with steel-backed plates
• Included Hardware: CNC-machined flywheel, pressure plate, diaphragm spring, friction plates, Mono-Drive hub, floater, Monoloc collar, release bearing, alignment tool, and pilot bearing (if required)
• Manufacturer Part Number: T2S-S05

The Yukon Dura Grip (MPN: YDGF7.5-28) is a clutch-style positraction limited slip differential that provides smooth yet aggressive traction for select 1978-2011 Ford, Lincoln, Mercury, and Mazda vehicles. Engineered for long-term serviceability, this unit is fully rebuildable and designed to deliver reliable performance across a variety of terrains.

Constructed with a high-strength nodular iron case, the Dura Grip features internal spider gears forged from 4320 chromoly. These gears are precision-cut for maximum tooth strength and durability under load. The internal assembly utilizes composite clutches to manage torque transfer effectively while maintaining streetable manners. This unit is compatible with all gear ratios for the Ford 7.5-inch housing and is designed specifically for 28-spline axles.

• Fits Ford 7.5" differential housings with 28-spline axles
• Compatible with all gear ratios
• High-strength nodular iron case construction
• Forged 4320 chromoly spider gears for increased durability
• Composite clutches for smooth, consistent engagement
• Fully rebuildable design for extended service life
• Assembled in the USA
• Manufacturer Part Number: YDGF7.5-28

The Yukon Gear Dura Grip (MPN YDGF10.25-35-1) is a positraction limited slip differential engineered to provide smooth yet aggressive traction for Ford 10.25" and 10.5" rear ends. Designed for durability in demanding terrains, this 4-pinion LSD utilizes high-strength materials to ensure consistent power delivery and a long service life.

Fits select 1985-2019 Ford F-150, F-250, F-350, E-250, E-350, and Excursion models equipped with 35-spline axles. This unit is designed specifically for full-float applications and is not compatible with C-clip axles. The Dura Grip is fully rebuildable, making it a sustainable choice for long-term performance.

• Fits Ford 10.25" and 10.5" differentials with 35-spline axles
• Forged 4320 chromoly spider gears for maximum tooth strength
• High-strength nodular iron case construction
• Composite clutches for smooth, chatter-free engagement
• Compatible with all gear ratios
• Internal 4-pinion design for superior load distribution
• Proudly assembled in the USA
• Manufacturer Part Number: YDGF10.25-35-1

Fits select 1981-2012 Dodge D250, D350, Ram 2500, Ram 3500, W250, W350, and Ford E-350 Econoline / Super Duty models.

The Yukon Gear Dura Grip is a high-performance positraction limited slip differential (LSD) engineered for aggressive traction and smooth operation across diverse terrains. Designed for the Dana Spicer 70 rear axle, this unit replaces an open or worn-out differential to provide the grip necessary for heavy-duty towing, off-roading, and street performance.

This 4-pinion LSD is built with a high-strength nodular iron case and features forged 4320 chromoly spider gears for superior durability under high-torque loads. The internal composite clutches deliver consistent engagement and are fully rebuildable, ensuring a long service life. This unit is compatible with 32-spline axles and is designed for 4.10 and down gear ratios (numerically lower), including compatibility with thick gears.

• Manufacturer Part Number: YDGD70-3-32
• Fits Dana Spicer 70 with 32-spline axles
• Compatible with 4.10 and down gear ratios (also fits thick gears)
• 4-pinion design for optimized strength and load distribution
• Forged 4320 chromoly spider gears for maximum tooth strength
• High-strength nodular iron case construction
• Fully rebuildable design with durable composite clutches
• Assembled in the USA

Fits select 1953-2006 Chevrolet, Dodge, Ford, GMC, and Jeep vehicles equipped with Dana 44 axles and 30-spline shafts (5.9L). This Yukon Dura Grip limited slip differential (LSD) provides smooth yet aggressive traction, delivering the performance and predictability needed for both street and off-road environments. Engineered for durability and longevity, this unit is fully rebuildable and designed for a precise fit.

The Dura Grip is constructed with a high-strength nodular iron case and features forged 4320 chromoly spider gears for maximum resistance to tooth breakage in high-torque applications. Internal composite clutches ensure consistent engagement and long service life. Whether you are replacing a worn factory unit or upgrading for better trail performance, the Dura Grip offers a robust solution for vehicles with 3.92 and numerically higher gear ratios.

• Manufacturer Part Number: YDGD44-4-30-1
• Axle Model: Dana Spicer 44
• Spline Count: 30
• Carrier Range: 3.92 and Up
• Case Material: High-strength nodular iron
• Internal Gears: Forged 4320 chromoly spider gears
• Clutch Type: Composite clutches
• Design: Fully rebuildable and assembled in the USA

Fits select 1953-2011 Chevrolet, Dodge, Ford, GMC, and Jeep models (5.9L). The Yukon Dura Grip is a clutch-style positraction limited slip differential designed to provide smooth yet aggressive traction across varied terrain. Built for durability and performance, this unit features a high-strength nodular iron case and internal components forged from 4320 chromoly steel to handle the stresses of street and off-road use.

This rebuildable differential uses composite clutches for a long service life and predictable engagement. It is designed for Dana Spicer 44 housings utilizing 30-spline axle shafts and is compatible with carrier-specific gear ratios of 3.73 and numerically lower (including thick gears).

• Manufacturer Part Number: YDGD44-3-30-1
• Fits Dana Spicer 44 with 30-spline axles
• Compatible with 3.73 and down gear ratios (also fits thick gears)
• Constructed with high-strength nodular iron case
• Forged 4320 chromoly spider gears for maximum tooth strength
• Equipped with high-friction composite clutches
• Fully rebuildable design
• Proudly assembled in the USA

Fits 2010-2025 Dodge Ram 1500 and Ram 1500 Classic models equipped with the Chrysler 9.25" ZF rear differential and 31-spline axles.

The Yukon Dura Grip is a clutch-style positraction limited slip differential designed to provide smooth yet aggressive traction. Whether you are navigating off-road terrain or looking for better street performance, the Dura Grip delivers power to both wheels without the harsh engagement of a mechanical locker. This unit is engineered for long-term durability, utilizing a high-strength nodular iron case and forged 4320 chromoly spider gears for maximum tooth strength. The composite clutches ensure a long service life and the entire unit is fully rebuildable, making it a sustainable performance upgrade for your drivetrain.

• Fits Chrysler 9.25" ZF rear differentials with 31-spline axles
• Compatible with all gear ratios
• High-strength nodular iron case for housing rigidity
• Forged 4320 chromoly spider gears for ultimate durability
• Internal composite clutches for smooth, reliable limited-slip operation
• Fully rebuildable design
• Assembled in the USA
• Manufacturer Part Number: YDGC9.25ZF-31-1

Fits select 1997-2012 Chrysler, Dodge, Jeep, and Ram vehicles equipped with 8.25-inch rear axles, 29-spline shafts, and 2.56-up gear ratios. The Yukon Dura Grip (YDGC8.25-29-1) is a clutch-style positraction limited slip differential designed for consistent traction and predictable engagement across diverse driving conditions. Built for long-term serviceability, this unit is fully rebuildable and engineered to withstand higher torque loads than standard OE components.

• High-Strength Construction: Features a nodular iron case for housing rigidity and forged 4320 chromoly spider gears for maximum tooth strength.
• Composite Clutches: Utilizes high-friction composite clutch packs to deliver smooth torque transfer while maintaining aggressive grip.
• Technical Specifications: Designed for the Chrysler 8.25" differential with a 29-spline count; compatible with all gear ratios 2.56 and numerically higher.
• Serviceability: Internal components are fully replaceable, allowing for easy maintenance and restoration of performance over time.
• Manufacturer Part Number: YDGC8.25-29-1