Understanding Limited Slip Differentials and Auburn Gear

For performance enthusiasts, off-road adventurers, and weekend racers alike, upgrading to a limited slip differential (LSD) like those offered by Auburn Gear represents one of the most impactful modifications you can make to your vehicle. An LSD intelligently manages torque distribution between the drive wheels, allowing a controlled amount of slip before fully locking. This dramatically improves traction when accelerating out of corners, climbing loose terrain, or driving in wet or snowy conditions.

Unlike a standard open differential, which sends power to the wheel with the least resistance, an Auburn LSD ensures that power is delivered to the wheel with the most grip. This is achieved through a cone-type limited slip design, known for its smooth engagement and long service life. Auburn Gear has been a trusted name in driveline components for decades, delivering products that balance street manners with track-ready performance. This article provides a deep dive into installation best practices, a realistic cost breakdown, and everything you need to know before making the switch.

How an Auburn Limited Slip Differential Works

At its core, an Auburn LSD uses a series of spring-loaded cones that press against the side gears. When wheel speed differs between the left and right axles (such as during a turn), the cones are forced together or apart, creating friction that resists the speed difference. This design is particularly forgiving for daily-driven vehicles because it engages progressively — not abruptly like some clutch-style LSDs — and provides consistent performance without requiring special break-in procedures or friction modifiers in many applications.

The benefits of this technology extend beyond simple traction. By reducing wheel spin, an Auburn LSD minimizes tire wear, improves stability under braking into corners, and allows the driver to apply power earlier coming out of a turn. For off-road use, it prevents a spinning wheel from digging a hole while the opposite wheel sits idle, making it an essential upgrade for Jeeps, trucks, and SUVs.

Why Choose Auburn Gear Over Competitors?

Auburn Gear differentiates itself through a few key advantages:

  • Sealed cone design – No need for frequent rebuilds or specialty clutches; the cones are self-contained and wear gradually.
  • Preload without backlash – Provides immediate torque transfer without the “clunk” or backlash common in some lockers.
  • USA-made quality – Manufactured in Auburn, Indiana, with strict quality control standards.
  • Wide application coverage – Available for popular axles such as GM 10-bolt, Ford 8.8, Dana 44, Dana 60, and many others.

While clutch-style LSDs (like those from Eaton or Yukon) offer different characteristics, the Auburn cone design is especially well-suited for street performance and occasional off-roading where smooth operation is a priority.

Preparing for Installation: Tools, Parts, and Workspace

Proper preparation is critical for a successful installation. Attempting the job without the right tools or a clean workspace can lead to damaged components or improper setup. Below is a comprehensive checklist.

Required Tools

  • Socket set (metric and SAE) with extensions
  • Torque wrench capable of 0-250 ft-lb
  • Pry bars and a bearing puller
  • Dial indicator with magnetic base (for measuring backlash)
  • Bearing race driver set or a suitable press
  • Gasket scraper and brake cleaner
  • Jack and jack stands (minimum 2-ton capacity)
  • Inch-pound torque wrench for pinion preload (if reusing original pinion)

Parts You Will Need

  • Auburn limited slip differential (specific to your axle model)
  • Installation kit: includes shims, bearings, seals, and sometimes a new pinion nut
  • Gear oil – typically 80W-90 or 75W-140 depending on application (check Auburn’s recommendation)
  • RTV silicone gasket maker or a differential cover gasket
  • Thread locker (Loctite 271 or equivalent) for ring gear bolts
  • Axle seals (if replacing while disassembled)

Workspace Considerations

You need a level concrete floor, adequate lighting, and enough room to move around both sides of the vehicle. If you do not have access to a hydraulic press or a dial indicator, many local machine shops can install the bearings onto the differential case for a modest fee. Also, plan to spend 4-8 hours for a first-time installer; experienced mechanics can complete the job in 2-3 hours.

Step-by-Step Installation Guide

The following steps assume you are replacing an open differential with an Auburn LSD in a typical solid-axle or independent rear axle vehicle. Always consult the official Auburn installation manual for your specific model.

1. Safely Lift and Secure the Vehicle

Jack up the rear of the vehicle (or front if installing a front LSD) and place it securely on jack stands. Remove both wheels to allow access to the axle shafts and differential housing. For rear axles, also disconnect the driveshaft at the pinion flange.

2. Remove Axle Shafts and Differential Cover

Unbolt the axle shafts from the axle tubes (or remove the C-clips if applicable) and slide them out. Be careful not to damage the axle seals. Next, drain the differential fluid by removing the fill and drain plugs. If there is no drain plug, remove the differential cover and let the fluid drain into a pan. Clean the cover and mating surface thoroughly.

3. Remove the Original Differential Case

This requires removing the carrier bearing caps (mark them left/right before removal), prying the old differential case out, and setting it aside. You may need to use a special spreader tool or a soft-faced mallet. Keep the bearing cups with their respective caps.

4. Set Up the New Auburn LSD

Install the ring gear onto the Auburn differential case using new ring gear bolts and thread locker. Torque the bolts to the factory specification (typically 70-90 ft-lb). Then, press on the new carrier bearings using a bearing driver or old bearing race. If you do not have a press, take the differential to a machine shop for bearing installation.

5. Install the Auburn Differential Into the Housing

Place the new assembly into the differential housing, ensuring the bearings seat properly in the bearing saddles. Install the bearing caps (with the correct orientation) and hand-tighten the cap bolts. At this point, you need to check backlash and preload. Using a dial indicator, measure the clearance between the ring and pinion gears. Adjust by swapping shims from one side of the carrier to the other. Typical backlash is 0.006–0.012 inches. Re-torque the cap bolts to the housing manufacturer’s specification (often 60-80 ft-lb).

6. Check Gear Pattern and Finalize

Apply marking compound (Prussian blue or equivalent) to the ring gear teeth and rotate the pinion to observe the contact pattern. Adjust if necessary. Once pattern is acceptable, install axle shafts, new axle seals, and the differential cover with a fresh gasket or RTV. Refill with the recommended gear oil (some Auburn LSDs accept conventional gear oil; others may require a specific additive – verify with Auburn’s official website).

7. Reassembly and Test Drive

Reattach the driveshaft, wheels, and lower the vehicle. Take a short test drive, performing figure-eight maneuvers to work the LSD cones. Listen for unusual noises and recheck fluid level after the first heat cycle.

Cost Breakdown: What You’ll Actually Spend

The total cost of installing an Auburn Limited Slip Differential varies based on your vehicle, whether you do the work yourself, and the condition of your existing differential. Below is a realistic breakdown.

Auburn LSD Unit

$450 – $1,200 depending on the axle model. For common axles like the GM 10-bolt, prices start around $500. For rare or heavy-duty applications (Dana 60, Ford 9-inch), expect $900–$1,200. Check retailers like Summit Racing for current pricing.

Installation Kit (Bearings, Shims, Seals, Bolts)

$80 – $150 – Most Auburn LSDs do not include an installation kit; you must buy one separately. A quality kit ensures you have the correct shims and new carrier bearings.

Gear Oil and Additives

$30 – $60 – A typical rear axle takes 2–3 quarts of gear oil. Synthetic oil costs more but provides better protection. Some Auburn models require a limited-slip friction modifier ($10–$20), though many newer units do not.

Labor (if not doing yourself)

$300 – $700 – Shop rates range from $100–$150 per hour. A professional installation takes 2–4 hours, plus diagnostic time if there are underlying issues like worn pinion bearings. Expect $400–$600 for a straightforward install.

Potential Additional Repairs

If the pinion bearings or seals are leaking, or if the ring and pinion gear set is worn, you may need a gear rebuild. A new ring and pinion set adds $200–$500 plus additional labor. Budget an extra $100–$200 for axle seals if they are original.

Total Estimated Cost

  • DIY including all parts: $600 – $1,400
  • Professional installation (no other repairs): $900 – $1,900
  • Professional installation with gear replacement: $1,500 – $2,500

Common Pitfalls and Expert Tips

  • Always set backlash carefully. Too tight will cause overheating and wear; too loose creates noise and accelerated gear wear.
  • Use a quality marking compound to verify the gear contact pattern. A poor pattern indicates incorrect shim or pinion depth adjustment.
  • Do not reuse old carrier bearings – they are removed during disassembly and should be replaced to ensure accurate preload.
  • Torque all bolts to spec. Ring gear bolts loosen over time if undertorqued; carrier cap bolts affect bearing preload.
  • Follow Auburn Gear’s break-in recommendations – generally 500 miles of normal driving without aggressive turning or towing.

Is an Auburn LSD Right for Your Build?

Auburn Limited Slip Differentials excel in street performance, autocross, light off-roading, and even drift applications. They are not designed for rock crawling where a full locker might be preferred, but they offer a huge improvement over open diffs. If your goals include better acceleration from corners, more predictable handling, and reduced wheel spin, the Auburn LSD is an excellent investment. For detailed fitment information, consult the Auburn Gear technical documents.

Frequently Asked Questions

Can I install an Auburn LSD myself with basic mechanical skills?

Yes, but you need a dial indicator, bearing press (or shop access), and the patience to set backlash correctly. If you have never worked on a differential, consider having a professional handle the setup while you handle the removal and reinstallation of the housing.

Does an Auburn LSD require special maintenance?

No. Change the gear oil every 30,000–50,000 miles or per the vehicle manufacturer’s schedule. The cone design is sealed and wear is minimal under normal use.

Will an Auburn LSD fit my stock axle?

In most cases, yes, as long as the axle spline count and ring gear diameter match. Auburn provides specific part numbers for each application. Always confirm before purchasing.

Conclusion

Installing an Auburn Limited Slip Differential is one of the most rewarding upgrades for improving your vehicle’s traction, handling, and overall driving confidence. By understanding the cost components and following the proper installation steps, you can avoid common mistakes and enjoy years of reliable performance. Whether you choose the DIY route or hire a professional, the investment in higher-quality components like those from Auburn Gear pays off every time you accelerate out of a turn or navigate a slippery trail. Plan your budget, gather your tools, and take your vehicle’s drivetrain to the next level.