Performance Transmission Oil Cooler Kit with Radiator DSG DQ500 / DQ381

DSG DQ250 Transmission Upgrade Oil Cooler Set with Radiator

Top upgrade for stock DSG DQ500 and DQ381 and enhanced transmissions as well as for improved cars using this transmission.

What does a DSG oil cooler do?

An oil cooler is an auxiliary cooling system installed in the gearbox oil circuit. Its purpose is to reduce and stabilize transmission oil temperature, especially under high load or performance use.

1) Lower operating oil temperature

Under aggressive driving, high torque, or track use, DSG oil temperature rises rapidly.

The oil cooler keeps temperatures lower and more consistent

Reduces thermal stress on internal components

2) Extended oil and component lifespan

High oil temperatures cause:

Faster oil degradation

Loss of lubrication properties

Increased wear on clutches, bearings, and gears

3) More consistent gear shifts

DQ500 and DQ381 gearboxes rely heavily on oil temperature and hydraulic pressure for shift control.

Stable oil temperature results in:
✔ More precise and repeatable shifts
✔ Reduced shift hesitation or irregular behavior
✔ Improved TCU control accuracy

With an oil cooler:
✔ Oil maintains its viscosity longer
✔ Reduced wear on clutch packs and bearings
✔ Longer service intervals and improved reliability

4) Reduced risk of overheating under high load

In conditions such as:

Track driving

Repeated hard launches

High ambient temperatures

High-torque tuned engines

An oil cooler prevents excessive heat buildup, reducing the risk of limp mode or thermal protection activation.

5) Improved reliability for tuned and high-power applications

In performance and modified vehicles:
✔ Higher torque generates more clutch heat
✔ Oil cooling becomes critical for durability
✔ Significantly improves gearbox reliability under sustained load

6) Improved performance consistency

Lower and controlled oil temperatures provide:

Stable hydraulic pressure

Predictable clutch engagement

Consistent shift quality lap after lap or pull after pull

This does not increase power, but maintains performance without degradation.

The Kit includes:

• Oil Cooler Adapter Plate
  
• Oil Radiator
  
• Fittings
  
• Hose