Source: http://us.gran-turismo.com/us/news/00_8161749.html

Not long at all since the last update it seems PD is getting back on track with their once a month content updates. I'm getting excited about GT again.

Vision Gran Turismo

The “Volkswagen GTI Roadster Vision Gran Turismo” has been released. Experience the dynamic all wheel drive supercar that inherits the DNA of the Volkswagen sports GTI philosophy.

After the update has been installed, the car can be purchased from the [Vision GT] option within the [CARS] section in "My Home". Alternatively, it is also possible to obtain the car by completing a lap (regardless of the lap time) in the new Seasonal Event, available only for a limited time.

The “Volkswagen Vision GT” racing gear has been added to the [Special Outfit] of [Racing Gear]. This can also be acquired through the limited time seasonal event.

Red Bull Ring

The full course and short track layouts of the Red Bull Ring has been added as new tracks to the game.

This is an ultra high speed circuit with long flat out sections, but there are tricky tight corners in between. How you handle these tight turns will greatly affect your final lap times. In 2014, Formula 1 racing returned to this track after an 11 year hiatus; the circuit truly brings together the best of the old and the new.

Additional Cars:

The following cars have been added to the [Dealerships]. You can also access the cars easily from the [Recommended Cars] section:

- GT-R NISMO GT3 Nissan GT Academy Team RJN ‘13

- Lexus IS F CCS-R ‘11

- Toyota TS030 Hybrid ‘12

Update of the Physics Simulation Model

The physics simulation model of “Gran Turismo 6” has been updated. Its main improvements are as follows:

(1) Dynamics of the car on surfaces with cornerstones and bumps

(2) Effect of tire geometry changes (mainly the Camber Angle)

(3) Controllability of some rear heavy cars

The default settings of tuning parts have also been adjusted to match this update.

Adjustments to cars:

On the various Mitsubishi Lancer Evolution X models, the [Active Steering] in [Driving Options] is now enabled.

Additional Offline Features and Adjustment

- [Datalogger] can now be called out from the Quick Menu of Time Trial events. However, please note that some of the features will be limited when used in this manner. Please refer to the online manual for more details.

- A [Reset to Default] option that returns car settings to their initial state has been added.

Start signals are now enabled on tracks with signals.

Additional Online Features and Adjustments

- A window that notifies the start of events, and countdowns for course voting has been added to the lower right of the open lobby.

-The upload timings for rankings have been changed for both Drift Rankings and Section Time Trials