Yukon Gear Dura Grip For Ford 7.5in

Yukon DuraGrip Positraction Limited-Slip Differential for Ford 7.5in, 28 Spline

The YDGF7.5-28 is a clutch-type positraction limited-slip differential built for Ford 7.5-inch rear axles with 28-spline axle shafts. The YDGF7.5-28 Dura Grip fits an enormous range of Ford, Mercury, Lincoln, and Mazda vehicles from 1978 through 2011, including Mustang, Ranger, Aerostar, Bronco II, Thunderbird, and Grand Marquis models. Built from a high-strength nodular iron case with forged 4320 chromoly spider gears and composite clutches, the YDGF7.5-28 delivers smooth progressive traction without the harshness of a locker. It is completely rebuildable and assembled in the USA, making it a long-term solution for street, strip, and light trail use.

Features and Benefits

• High-Strength Nodular Iron Case - Resists cracking and distortion under the torsional loads of hard acceleration and cornering, outlasting cast iron alternatives.
• Forged 4320 Chromoly Spider Gears - Premium alloy steel spider gears machined for precise tooth form, delivering maximum strength and quiet operation in the Ford 7.5in housing.
• Composite Clutch Packs - Raybestos-grade composite friction material provides smooth clutch engagement, eliminating the chatter common in metallic clutch limited-slip differentials.
• Completely Rebuildable - All internal components including clutch packs and preload springs are serviceable, extending the service life of the YDGF7.5-28 indefinitely.
• Fits All Gear Ratios - Unlike some limited-slip carriers that require different units for different gear ratios, the YDGF7.5-28 accommodates all available gear ratios for the Ford 7.5in differential.
• USA Assembly - Each unit is inspected and assembled in the USA to verify proper clutch pack preload and spider gear clearance before shipment.
• One-Year Warranty - Covered against manufacturer defects with Yukon's standard warranty.

Vehicle Fitment

Specifications

What is Included

• One assembled YDGF7.5-28 DuraGrip limited-slip differential carrier unit
• Pre-installed composite clutch packs and preload springs
• Yukon Limited Slip Additive recommendation information
• Installation instructions

Frequently Asked Questions

• Q: What differential does the YDGF7.5-28 fit?
  A: The Ford 7.5-inch rear axle with 28-spline axle shafts. Verify your spline count before ordering as 26-spline versions are not compatible.
• Q: Does the YDGF7.5-28 fit all gear ratios?
  A: Yes. Unlike some carriers that are ratio-specific, the Dura Grip fits all available gear ratios for the Ford 7.5in differential.
• Q: What gear oil should I use?
  A: Yukon recommends high-grade GL-5 non-synthetic gear oil with two bottles of limited slip additive. Synthetic oil may cause chattering in composite clutch units.
• Q: How do I know if my Mustang has the 7.5in or 8.8in axle?
  A: 1979 to 1985 V8 Mustangs typically have the 7.5in rear. 1986 and later V8 and V6 models generally use the larger 8.8in. Check the axle tag or measure the ring gear.
• Q: Can the YDGF7.5-28 be rebuilt when the clutches wear?
  A: Yes. Yukon offers rebuild kits with replacement clutch packs to restore full positraction performance without replacing the entire unit.
• Q: Does this differential comply with the Magnuson-Moss Warranty Act?
  A: Yes. Written warranty terms are supplied with the product in accordance with the Magnuson-Moss Warranty Act. No specific installer is required to maintain coverage.
• Q: Does this replace OEM Traction-Lok units?
  A: Yes, the YDGF7.5-28 is a direct replacement for original Ford Traction-Lok limited-slip carriers in 7.5in axles with 28-spline shafts.
• Q: Are carrier bearings included?
  A: Carrier bearings are not included with the YDGF7.5-28. Reuse serviceable original bearings or order Yukon carrier bearing sets separately.

Installation Overview

1. Drain the differential fluid and remove the differential cover and axle shafts.
2. Remove the original carrier assembly, noting bearing cap orientation and shim locations.
3. Transfer carrier bearings and races to the YDGF7.5-28 using a bearing press; do not hammer bearings directly.
4. Install the ring gear onto the carrier using thread-locking compound and torque ring gear bolts to specification.
5. Reinstall the carrier assembly with original shims as a baseline, then adjust for proper backlash (0.008 to 0.012 inch typical).
6. Verify gear contact pattern with marking compound before finalizing shim selection.
7. Torque carrier bearing caps to specification and reinstall the differential cover with sealant.
8. Fill the axle with the proper quantity of gear oil mixed with limited slip additive and verify for leaks.

California Proposition 65 Warning: This product can expose you to chemicals including lead and its compounds, which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov.