Introduction: Why Tuning Your S550 Tracklock Matters
If you own an S550 tracklock tuning guide, you know how crucial the rear differential is to overall performance. The Tracklock differential helps distribute power efficiently, ensuring better traction and handling. But did you know that tuning your Tracklock can take your Mustang’s performance to the next level?
Whether you’re hitting the drag strip or carving corners on a winding road, a properly tuned Tracklock differential can make all the difference. In this guide, we’ll break down the key aspects of S550 Tracklock tuning in simple, easy-to-follow steps.
Understanding the S550 Tracklock Differential
Before we dive into tuning, let’s quickly cover what the Tracklock differential does.
The Tracklock is a limited-slip differential (LSD) that helps maintain traction by distributing power between the rear wheels. When one wheel loses grip, the LSD transfers torque to the wheel with more traction, improving stability and control.
The stock S550 Tracklock is decent, but with some fine-tuning, it can perform even better—especially if you modify your Mustang for more power or aggressive driving.
Step-by-Step Guide to Tuning Your S550 Tracklock
1. Choosing the Right Gearratio
The stock gear ratio on most S550 Mustangs is around 3.31, 3.55, or 3.73. However, if you want better acceleration, you might consider upgrading to a 4.10 or 4.56 gear ratio. Here’s how different ratios affect performance:
- Lower ratios (e.g., 3.31, 3.55): better fuel efficiency, smoother highway cruising.
- Higher ratios (e.g., 4.10, 4.56): faster acceleration, ideal for drag racing but may reduce top speed.
2. Adjusting the Clutch Pack Preload
The Tracklock differential uses a clutch pack to regulate power transfer. If you want a firmer lock-up (useful for drag racing), you can increase the preload by adding shims. For a more street-friendly setup, reduce preload slightly for smoother engagement.
3. Upgrading to Carbon or Performance Clutch Discs
Stock clutch discs wear out over time, reducing the effectiveness of your LSD. Upgrading to carbon clutch packs can improve longevity and provide a more aggressive lock-up, which is great for high-performance driving.
4. Using the Right Differential Fluid
The right gear oil can make a big difference in how your Tracklock performs. Ford recommends 75W-140 synthetic gear oil, but if you want smoother engagement and longer life, consider an oil with added friction modifiers.
5. Checking and Adjusting Backlash
Backlash refers to the play between the gears inside your differential. Too much backlash can cause clunking noises and power loss, while too little can lead to excessive wear. The ideal range for most setups is 0.008” to 0.012”. You can measure and adjust this with a dial indicator.
6. Fine-Tuning Your Suspension for Better Performance
Your differential works alongside your suspension, so tuning it properly helps maximise your Tracklock’s performance. Consider:
- Stiffer bushings to reduce wheel hop.
- Adjustable control arms for better pinion angle tuning.
- Lowering springs or coilovers for improved weight transfer.
Common Issues & How to Fix Them
1. Excessive Wheel Hop
- Solution: Upgrade bushings, stiffer rear shocks, and better tires.
2. Clutch Packs Wearing Out Prematurely
- Solution: Use higher-quality clutch discs and proper gear oil.
3. Clunking or Whining Noises
- Solution: Check backlash, add friction modifier, and ensure correct torque settings.
Conclusion
S550 tracklock tuning guide differential isn’t just for racers—it’s for anyone who wants better performance, smoother power delivery, and improved traction. By optimising gear ratios, adjusting clutch packs, and using the right fluids, you can unlock the full potential of your Mustang’s rear end.
Take the time to dial in your setup, and you’ll notice a significant difference in how your car handles on the road and track. Happy tuning!
FAQs
Q1: Is tuning my Tracklock differential necessary for daily driving?
Not necessarily, but fine tuning can improve performance and longevity, especially if you drive aggressively.
Q2: Can I upgrade my S550 Tracklock myself?
Yes, if you have mechanical experience. However, for complex adjustments like backlash tuning, professional installation is recommended.
Q3: How often should I change my differential fluid?
Every 30,000 to 50,000 miles, or sooner if you track your car frequently.
Q4: What’s the best gear ratio for a street-driven S550?
A 3.73 or 4.10 gear ratio offers a great balance of acceleration and drivability.
Q5: How do I know if my clutch packs need replacing?
If you notice one-wheel burnouts, excessive wheel spin, or weak engagement, it might be time to replace the clutch packs.
