1978 VW Westfalia Rear Suspension Parts: A Complete Guide

If you own a 1978 Volkswagen Westfalia, the rear suspension is a critical system for both ride quality and load capacity. Over time, bushings wear, shocks leak, and springs sag, especially with the added weight of camper amenities. This guide covers the essential rear suspension components for your Westfalia, what to look for during replacement, and how to choose parts that restore or improve handling.

Understanding the 1978 VW Westfalia Rear Suspension

The 1978 Westfalia, based on the VW Type 2 (T2) platform, uses a rear swing axle with trailing arms, coil springs, and shock absorbers. Unlike modern vehicles, the rear suspension is independent but relatively simple. Key components include:

• Coil springs (rear)
• Shock absorbers
• Trailing arm bushings
• Axle boots and CV joints (part of the suspension system layout)
• Rear sway bar (if equipped)
• Spring plates and adjusters

Many 1978 Westfalia owners are restoring or upgrading their vans, and the rear suspension is a common area needing attention due to age and mileage.

Rear Coil Springs: Stock vs. Upgraded

Stock rear coil springs for the 1978 Westfalia are designed for the original vehicle weight, but after decades, they often sag, causing a lowered stance and poor ride. When replacing, you have two main options:

OEM Replacement Springs

OEM-style springs match the factory ride height and spring rate. These are ideal if you keep the Westfalia stock and do not carry heavy loads. They offer a comfortable ride and are direct bolt-in. Be sure to purchase springs specifically for the 1978 model year, as early Bay Window springs differ slightly.

Heavy-Duty or Lift Springs

Many owners upgrade to heavy-duty springs to compensate for the added weight of a pop-top, cabinets, and gear. Heavy-duty springs have a higher spring rate and may raise the rear about 1–2 inches, improving ground clearance and reducing bottoming out. If you plan to use your Westfalia for camping with full gear, these are a practical upgrade. Lift springs are also available if you want more clearance for off-road use, but they can stiffen the ride considerably.

When choosing springs, check the diameter and number of coils. T2 springs are typically around 12 mm wire diameter, but aftermarket options vary. Measure your current sag and consult with a supplier who knows Westfalia specifics.

Shock Absorbers for the 1978 Westfalia

Shocks control rebound and compression. After 40+ years, original shocks are likely worn out. Replacing them is one of the easiest and most impactful upgrades.

Standard Gas Shocks

Standard replacement shocks like Sachs or Monroe are affordable and restore factory-like dampening. They are fine for daily driving and occasional camping. Make sure they are spec’d for the rear of a 1978 Type 2, not the earlier split-window bus (different mount spacing).

Heavy-Duty or Adjustable Shocks

For a Westfalia, heavy-duty shocks (e.g., Bilstein B6 or Koni) are often recommended. They provide better control when loaded and reduce sway. Adjustable shocks let you fine-tune the dampening for different loads. While more expensive, they can dramatically improve handling on winding roads.

Pro tip: Replace both shocks at the same time, and consider adding a rear sway bar if your van doesn’t have one.

Trailing Arm Bushings: A Common Wear Point

The rear trailing arms pivot on rubber bushings. Over time, these crack and cause imprecise handling, clunking noises, and uneven tire wear.

Rubber Bushings

OEM-style rubber bushings are cheap and easy to install. They provide a quiet, compliant ride but may last only 30,000–50,000 miles. If your van is mostly a weekend cruiser, rubber is fine.

Polyurethane Bushings

Polyurethane bushings are stiffer and more durable. They reduce play and improve steering response, but they transmit more road noise and vibration. Many Westfalia owners prefer them for longer service life and better control, especially with heavy loads. However, polyurethane needs proper lubrication to prevent squeaking.

When replacing bushings, also inspect the trailing arm pivot bolts and sleeves for rust or wear. These are often overlooked and can fail if corroded.

Spring Plates and Adjusters

The spring plates support the coil springs and allow adjustment of ride height via threaded adjusters. On the 1978 model, the spring plate is a stamped steel part that can rust or crack.

If you find that even with new springs the ride height is off, check the spring plates. They may be bent or the adjusters seized. Replacement spring plates are available, and aftermarket units sometimes offer more adjustment range. When installing, use anti-seize on the adjuster threads to prevent future corrosion.

Axle Boots and CV Joints

While not strictly suspension, the rear axle boots protect the CV joints, which are part of the drivetrain but close to the suspension. Check the rubber boots for tears. If they are damaged, dirt enters the joint and can cause failure. Replace boots and repack CV joints as needed. This is a good time to inspect the CV joint for wear.

Rear Sway Bar: Should You Add One?

Many 1978 Westfalia vans did not come with a rear sway bar. Adding one can reduce body roll significantly, especially in crosswinds or corners. Aftermarket sway bars (e.g., from companies like Anti-Sway Bars) are available. Installation involves drilling a few holes and mounting brackets. It’s a worthwhile upgrade if you drive highway speeds often.

Part Compatibility and Interchange

Be aware that some parts are intentionally shared with other VW Type 2 vehicles (1968–1979). However, the 1978 Westfalia has specific load capacities. When ordering, use your VIN or model year to confirm. Rear springs for a standard 1978 VW bus will physically fit but may not support the Westfalia’s weight. Always specify Westfalia or camper when buying.

Practical Buying Tips

• Buy from reputable VW bus parts suppliers (not marketplaces) that specialize in Type 2 parts. They can confirm fitment.
• If replacing coil springs, replace the isolators (rubber pads) at the top and bottom of the springs.
• Consider a complete rear suspension rebuild kit that includes bushings, shocks, and springs for convenience.
• Set your ride height before alignment; the rear suspension geometry is sensitive to height changes.
• If you install lift springs, also check the transmission angle—excessive lift can cause vibration.

Final Recommendation

For most 1978 VW Westfalia owners, the best approach is a balanced upgrade: use heavy-duty springs and shocks to handle the camper weight, replace trailing arm bushings with polyurethane for durability, and add a rear sway bar for safety. This combination restores ride quality, prevents sag, and improves handling without being overly stiff. Always inspect all mounting points and hardware for rust or damage before installing new parts.

Whether you are restoring a classic or building a daily driver, taking the time to sort out the rear suspension will make your Westfalia safer and more enjoyable on the road.