Radiators

Porsche Transmission Cooling Radiators | Maintain Optimal Gearbox Temperatures for Performance & Longevity

Transmission cooling radiators play a vital role in regulating gearbox temperature and protecting your Porsche’s transmission from heat damage. By cooling the transmission fluid as it circulates through the system, these radiators ensure smooth gear shifting, consistent performance, and extended component life — especially during spirited driving or track use.

At Design911, we supply high-quality transmission cooling radiators designed to meet or exceed original engineering standards. Each unit features precision-welded cores, durable end tanks, and efficient heat-dissipating construction to maintain stable operating temperatures under all driving conditions.

Whether you’re replacing a leaking radiator or upgrading your Porsche for enhanced cooling performance, our transmission radiators provide the reliability and precision your drivetrain deserves.

What Do Transmission Cooling Radiators Do?

The transmission radiator cools the fluid that lubricates and powers your gearbox, preventing overheating and ensuring consistent operation.

Core Functions:

Regulates transmission oil temperature to prevent overheating. Dissipates heat through a high-efficiency fin and tube system. Maintains correct fluid viscosity for smooth gear shifting. Protects internal gearbox seals, bearings, and clutch packs. Supports long-term transmission health and reliability.

Without an effective cooling radiator, transmission temperatures can spike — leading to fluid breakdown, harsh shifts, and potential gearbox failure.

Why Do Transmission Radiators Fail or Leak?

Transmission radiators endure constant pressure, vibration, and thermal cycling. Over time, these stresses can lead to leaks, corrosion, or reduced cooling efficiency.

Common Causes of Failure Include:

• Corrosion or pitting in the core or end tanks.
• Cracks from vibration, debris impact, or overpressure.
• Blocked coolant or oil passages restricting flow.
• Internal contamination from gearbox debris or degraded fluid.
• Gasket or fitting wear leading to fluid leaks.

Symptoms of a failing transmission radiator include overheating, visible leaks, gearbox warning lights, or discoloured transmission fluid.

Why Replace Your Porsche Transmission Cooling Radiator?

Replacing a damaged or inefficient transmission radiator prevents overheating, improves gearshift smoothness, and ensures reliable performance. Upgraded units offer enhanced cooling capacity — ideal for performance driving or motorsport use.

Key Benefits:

• Restores effective transmission cooling and heat control.
• Prevents overheating and fluid breakdown.
• Improves shifting consistency and drivetrain reliability.
• Extends gearbox and transmission component lifespan.
• Available for Porsche 911, Cayman, Boxster, Panamera, and PDK models.
• Ideal for servicing, rebuilds, and performance upgrades.

Routine inspection and timely replacement of transmission cooling radiators can prevent costly transmission repairs and maintain optimal driving performance.

Highlights

• Precision-engineered Porsche transmission cooling radiators.
• Efficient heat dissipation for manual, Tiptronic, and PDK gearboxes.
• Durable aluminium construction for superior reliability.
• Perfect for performance, road, or restoration applications.
• Prevents overheating and extends transmission life.
• Direct-fit replacement compatible with a wide range of Porsche models.