If you own a 2008 Polaris Switchback with a 136-inch track, you know the stock skid suspension can feel a bit soft or dated after years of hard riding. Upgrading key components can transform the sled's handling, bump absorption, and overall comfort. This guide covers the most impactful parts to swap—shocks, springs, rails, and more—so you can dial in your Switchback for aggressive trail riding or off-trail play. We'll explain what each upgrade does, compatibility considerations, and installation tips to help you get the most out of your classic sled.
Why Upgrade the Skid Suspension on a 2008 Polaris Switchback 136?
The 2008 Switchback 136 came with a standard IQ rear suspension that was decent for its era, but suspension technology has advanced significantly. Upgrading parts like the rear shock or torsion springs can reduce sag, improve bottoming resistance, and give you a plusher ride over rough terrain. It also lets you tailor the sled to your weight and riding style without buying a whole new sled.
Common Issues with the Stock Suspension
- Harsh bottoming on big hits due to under-damped shock valving.
- Excessive sag from weak torsion springs, especially for heavier riders.
- Poor small-bump compliance leading to trail chatter.
- Limited adjustability – stock rebound damping may not have enough range.
Upgrading addresses these pain points and extends the life of your sled.
Key Upgraded Parts for the 2008 Polaris Switchback 136 Skid
Focus on the components that give the biggest performance return. The skid suspension consists of the front arm shock (often called the rear shock in the skid), rear torsion springs, rear arm shock, and the rails themselves. Here's what to consider upgrading.
Rear Shock (Main Shock)
The stock rear shock is a basic coil-over unit. Replacing it with a high-quality aftermarket shock—like a Walker Evans, Fox, or Elka—provides better damping control, more consistent performance, and often includes adjustable compression and rebound. Look for a shock built for a 136-inch IQ chassis (direct fit without modification). Expect to spend $300–$600 depending on features.
Benefits:
- Improved bottoming resistance by 20-30%
- Better small-bump compliance
- Adjustable to rider weight and terrain
Torsion Springs
Stock torsion springs are often too light for aggressive riding. Upgraded springs (dual-rate or heavier single-rate) reduce sag and keep the skid in the right ride height. Brands like SLP, Zbroz, and others make direct-fit torsion springs for the Switchback 136. They come in different rates; choose based on your weight and riding style. For a 180-220 lb rider, a medium rate (like 160/210 dual-rate) works well.
Benefits:
- Reduced sag by 1-2 inches
- Better traction transfer
- Less bottoming on smooth whoops
Front Arm Shock (If applicable)
Some aftermarket setups include a separate front arm shock, but the 2008 IQ skid typically has a single rear shock driving the front arm via a linkage. Upgrading the entire shock assembly is the priority; swapping only the front arm may not add much value unless you replace the whole skid. However, you can install a different center shock (where applicable) to change ride characteristics.
Rear Rails
Stock rails are steel and can bend over time. Lightweight aluminum rails (like those from Holz or TKI) reduce unsprung weight by several pounds, improving bump compliance and acceleration. They also allow wider wheel kits for better hyfax wear. This is a more involved upgrade but worthwhile for serious riders.
Considerations:
- Aluminum rails require different hyfax (plastic guides) and often new bogie wheels.
- They may change the track tension; always re-check tension after installation.
Wheels and Hyfax
While not part of the skid suspension per se, upgrading bogie wheels to larger diameter (like 4-inch or 5-inch) with better bearings reduces friction and heat. Also, using taller hyfax (e.g., 0.75-inch thick) prolongs wear. These are simple bolt-on upgrades that complement suspension work.
Compatibility and Fitment for 2008 Polaris Switchback 136
Before buying parts, verify they fit the 2008 IQ chassis with a 136-inch track. Most aftermarket components designed for the IQ skid (2006-2010) will work. Key measurements:
- Shock length: about 13-14 inches between centers (collapsed).
- Spring ID: typically 2.5-inch.
- Rail spacing: 11.3 inches center-to-center.
- Track pitch: 2.52-inch.
When in doubt, check manufacturer fitment lists or call their tech support. Some shocks may require slight bracket modifications; always consult instructions.
How to Install Upgraded Skid Suspension Parts
While you can do this in your garage, be prepared for a few hours' work. Basic tools: jack stands, socket set, torque wrench, and possibly a spring compressor for torsion springs.
Step-by-Step Overview
- Remove the skid – Lift the sled, take off the track, and unbolt the skid from the tunnel. Use a jack to support it.
- Disassemble the stock parts – Remove rear shock, torsion springs, and any wheels if replacing rails.
- Install new torsion springs – Compress the springs using a spring compressor and seat them on the spring cups. Ensure they are oriented correctly.
- Install new rear shock – Bolt the shock into the original mounting points. Torque to spec (typically 40-50 lb-ft).
- Reinstall the skid – Lift the skid back, align with tunnel holes, and torque all bolts.
- Reinstall the track – Adjust track tension and alignment per service manual (usually 1.5-2 inches of sag at the mid-point).
- Set sag and damping – With rider weight, adjust torsion spring preload and shock clickers for desired ride height and damping feel.
Tips:
- Use blue Loctite on shock mounting bolts.
- Check hyfax clearance—upgraded shocks may change ride height slightly.
- Test ride and make minor adjustments until it feels right.
Choosing the Right Upgrade Path
Your choice depends on budget and goals:
- Budget upgrade (~$400): Replace only the rear shock with a quality aftermarket unit and add stiffer torsion springs. This gives the most noticeable improvement for minimal cost.
- Performance upgrade (~$800): Add aluminum rails and a full shock kit (front and rear if applicable). Pair with premium torsion springs. Great for aggressive trail riders.
- All-out build (~$1500+): Replace the entire skid with a modern aftermarket unit (like a 2013+ Pro-Ride or a custom IceAge skid). This requires more modifications but yields the best performance.
Final Recommendation
For most riders, the best bang-for-your-buck upgrade for a 2008 Polaris Switchback 136 skid is a quality aftermarket rear shock combined with matched torsion springs. This directly addresses the stock suspension's biggest weaknesses: bottoming and excessive sag. Spend around $500 on a shock like a Fox Float 3 (if air shock preferred) or a Walker Evans coil-over, plus $100 on springs. You'll notice a much smoother ride on trails and less fatigue on long days. If you're heavier (over 220 lbs) or ride aggressively, also consider upgrading to aluminum rails to drop unsprung weight. Always set sag and damping properly after installation. With these upgrades, your 2008 Switchback will feel like a much newer sled—ready for another decade of riding.