If you own a 2005 Forest River Cardinal 33 LE fifth wheel, you know it's a sturdy rig. But after nearly two decades, the suspension components wear out. Sagging springs, cracked bushings, or broken shackles can turn a road trip into a nightmare. This guide covers the specific suspension parts for the 2005 Cardinal 33 LE, how to identify them, and what to look for when replacing them.
Understanding the Suspension System on a 2005 Forest River Cardinal 33 LE
Most 2005 Cardinal 33 LE models use a leaf spring suspension with equalizers and shackles. The axle rating is typically 7,000 lbs per axle, but always confirm your specific unit. The suspension components include:
- Leaf springs
- Shackles and hangers
- Equalizers
- Spring bushings and wet bolts
- U-bolts and plates
These parts are not interchangeable with every RV. The Cardinal 33 LE is a heavy fifth wheel (around 12,000–14,000 lbs GVWR) and uses heavy-duty components.
Leaf Springs for the Cardinal 33 LE
The leaf springs on the 2005 model are usually 6-leaf or 7-leaf springs, 1.75 inches wide, with a specific curvature (arch) and length. Common part numbers from manufacturers like Lippert or Dexter can cross-reference. Measure your existing springs: eye-to-eye length (typically 26–30 inches) and the number of leaves. A typical replacement for the 33 LE is a 7-leaf, 26.5-inch spring rated at 3,500 lbs each (for dual-axle setups).
Shackles, Hangers, and Equalizers
These metal brackets and links are prone to rust and fatigue. The shackles on the 33 LE often use a 4-inch center-to-center bolt spacing. Hangers are welded to the frame and may require cutting/grinding if damaged. Equalizers balance load between axles; the 33 LE uses a 6-inch equalizer (bolt spacing 6 inches center to center). Always measure before ordering.
Identifying the Correct Suspension Parts for Your 2005 Cardinal 33 LE
Don't rely solely on the model year. The actual suspension may differ based on the build date or optional upgrades. The best approach is to:
- Locate the axle manufacturer label (Dexter, Lippert, Al-Ko).
- Check the spring code stamped on the spring pack (e.g., "7L3.5K26").
- Photograph the entire suspension and measure bolt sizes, spring width, and bolt spacing.
If you cannot find markings, remove one spring and take it to a trailer supply shop for matching.
Common Wear Points on the 33 LE Suspension
Frequent issues include:
- Dry or cracked bushings: The bronze or plastic bushings inside spring eyes and equalizers wear out, causing clunking.
- Bent or rusted shackles: Corrosion can weaken shackles, especially in northern states.
- Sagging leaf springs: Permanent loss of arch, lowering the trailer and reducing tire clearance.
- Worn wet bolts: The lubrication system (if equipped) can fail, leading to dry bolt wear.
Upgrading to wet bolt kits is a popular improvement for this model.
Where to Buy Forest River Cardinal Suspension Parts (Non-Marketplace)
Since we avoid naming marketplaces, focus on direct manufacturers and specialty RV parts dealers. Reputable sources include:
- Dexter Axle Company: They supply many OEM parts; order direct or through dealers.
- Lippert Components (LCI): Another OEM supplier for Forest River; they have a parts hotline.
- RV parts wholesalers like eTrailer, RV Upgrades, or your local RV dealer.
- Trailer spring shops: Local heavy truck spring shops can manufacture custom leaf springs.
Always confirm stock and availability – suspension parts for a 20-year-old model may be special order.
Step-by-Step Replacement Tips
Replacing suspension parts on a fifth wheel requires jacking and supporting the frame. Never work under a trailer supported only by jacks. Use jack stands rated for the axle weight.
- Chock wheels and level the trailer.
- Jack up the frame just enough to take weight off the springs.
- Remove the wheels and tires to access the suspension.
- Unbolt shackles and equalizers – penetrating oil helps.
- Remove U-bolts (typically 1/2-inch diameter) and the spring pack.
- Install new springs with new bushings, shackles, and bolts. Use anti-seize on threads.
- Tighten U-bolts to spec – usually 100–120 ft-lbs for 1/2-inch U-bolts, but verify.
Torque specifications are critical. Over-tightening can strip threads; under-tightening can cause spring shift.
Upgrading to Wet Bolts
If your 2005 Cardinal still uses dry bolts, consider a wet bolt kit. These have lubrication channels and zerk fittings, allowing you to grease the suspension. Kits include all spring eye bolts, equalizer bolts, and shackle bolts with bushings. This reduces wear and extends component life.
Final Recommendations for 2005 Forest River Cardinal 33 LE Suspension Parts
For a safe and reliable ride, replace the following as a set:
- Leaf springs: Match the load rating (usually 3,500 lbs per spring). Brand: Dexter or Lippert.
- Shackles and hangers: Use heavy-duty steel, not cast. Measure bolt spacing.
- Equalizers: 6-inch type with bronze bushings.
- Wet bolt kit: Upgrades all pivot points.
- U-bolt kit: Includes new nuts and plates.
Skip generic "universal" parts. Stick to OEM specifications for the 2005 Cardinal 33 LE. If you are not mechanical, hire a certified RV technician. Improper installation can lead to suspension failure on the road.
By replacing these components, your Cardinal will tow smoothly and safely for many more miles. Always inspect the suspension before long trips and after rough roads.