Rear Suspension Axle Strut - Spring Plate. Porsche 964 RS 1992-1994

Rear Suspension Axle Strut - Spring Plate.
Restore the handling precision and stability of your Porsche 964 with this direct-fit rear axle strut spring plate. This component serves as the mounting interface for the rear suspension strut/torsion bar assembly, designed to manage rear load transfer and geometry under cornering, acceleration and braking. This plate helps hold alignment, minimise unwanted movement and preserve the integrity of your rear suspension. Ideal for restoration, performance upgrades, or any chassis refresh where rear-end precision is paramount.
Sold Each.

Fits:

• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93

Diagram Ref No 7

What This Product Does:

• As the rear axle strut spring plate, it functions as a pivot and mounting point for the rear suspension strut or torsion bar system. It carries and distributes loads from the suspension into the chassis.
• The “spring plate” terminology signifies that this plate has some built-in flex or mount compliance (often via rubber bushings, spherical bearings or polyurethane supports) to allow controlled articulation while maintaining alignment.
• It helps maintain correct rear suspension geometry (camber, toe, ride height) under dynamic loads (cornering, acceleration, braking). Worn or deformed plates allow unwanted movement, which degrades handling precision.
• In performance or upgraded setups, improved spring plates offer stiffer bearings or spherical joints to reduce unwanted deflection and maintain sharper handling.

Symptoms & Signs Of Wear Or Failure:

• Rear end feels loose or imprecise in corners — the axle may shift slightly or alignment may alter under load.
  
• Clunking or knocking noises from the rear suspension when hitting bumps or during load transitions, as the plate or its bushings allow movement.
  
• Uneven tire wear on the rear tyres due to geometry shifting.
  
• The car may have difficulty holding correct ride height or alignment settings after suspension work.
• Increased vibration or harshness as the original flexible mount wears out and transfers more shock into the chassis.
• Visible deterioration: cracked rubber bushings, fatigue in the plate, corrosion, or play in the mount. Many aftermarket sites note that “original steel spring plates can oxidise … bushings and bearings degrade … lead to unpredictable and imprecise handling.

Why Replacement Matters:

• Over time, the original suspension mount plates and bushings are subject to fatigue, corrosion, rubber deterioration and wear. For a car that’s decades old, the mounting points may no longer behave as designed.
• Replacing these spring plate/axle strut mounts restores factory-level stability and alignment integrity — critical for handling, especially in performance driving.
  
• Upgraded versions allow for less deflection, more precise geometry, and better feedback — beneficial if you’ve modified suspension, lowered the car, added wider tyres, or use the car for spirited driving or track work.
  
• A new plate helps maintain reliable load transfer, prevents unwanted movement in the suspension, and protects against secondary wear in other components (arms, bearings, bushings) due to misalignment.
  
• In short, it’s a foundational part of the rear suspension that if neglected, undermines the rest of your chassis and alignment effort.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9643310

The product you are viewing cross references to these numbers