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The Four Most Common Types of Differentials and What You Need to Know About Them

Many fans and enthusiasts talk about or hear pro drivers and their engineers discuss the "diff" or "differential." It's a part of the car that is NOT easily changed and adjusted by the average high performance track day driver, but knowing how the different types of diffs behave can help you understand the handling of your car and what you can do to improve it.

WR: 2014 Ford Focus ST

This week we find ourselves behind the wheel of another factory-built hot hatch. Much like the Fiesta we featured in September, the Focus also gets a thorough high performance reworking for ST duty from Ford’s engineers.

Rumor: The Naturally Aspirated Porsche 911’s Days Are Numbered

The latest buzz around the sports car water cooler is that a refreshed Porsche 911 lineup, due in autumn of 2015, will signal the end of natural aspiration in the Carrera and Carrera S 911s, with a switch to smaller displacement and turbocharging in the name of addressing ever-tightening fuel economy and emissions standards.

Classic: Japanese Grand Touring Championships / SuperGT

Calsonic blue, Autobacs orange, Takata green. Show any Millennial gearhead these racing liveries and they'll recognize them faster than a Baby Boomer can scream "Gulf!

TMI AutoTech Offers US-Exclusive Turbocharged Ariel Atom 3S

The Ariel Atom has been distorting faces here in the US since 2008 by way of TMI Auto Tech, the Ariel Atom’s exclusive manufacture in the States since 2008.

WRR TV: Tire Failure or Red Mist?

Ride along with Dean Martin in the #50 Picture Cars East/Rehagen Racing Ford Mustang Boss 302S during Race 2 at Sonoma Raceway during the Pirelli World Challenge GTS race on Sunday August 24th.

Preview: Ariel Atom 3S

The Ariel Atom has been distorting faces here in the US since 2008 by way of TMI Auto Tech, the Ariel Atom’s exclusive manufacture in the States since 2008.

Classic: Alfa Romeo Tipo 33

A small team of Alfa Romeo engineers began developing the Tipo 33 racer in 1964. Largely controlled by the Italian government, Milan-based Alfa was eager to return to the track after a nearly 15-year long absence.

Driven: 2015 Cadillac CTS Vsport

With competition from the likes of the BMW 5-Series, the Mercedes-Benz E-Class, and the Audi A6, it’s clear that Cadillac faced an uphill battle when they brought the CTS into the midsized sport sedan fray back in 2002.

Update: Porsche to Bring Diesel-Powered Macan Stateside

Andre Oosthuizen, vice president of marketing for Porsche Cars North America, has confirmed that the oil-burning version of Porsche’s newest five-door will be making its way to the US within the next year or so.

Rumors: 2015 BMW M2 Rendered, Specs Detailed

While the new M3 sedan and M4 coupe are highly capable on the racetrack and adept at handling daily driver duties, over the years, the steady increase in both physical size and price tags of those cars have caused some hemming and hawing from BMW fans who long for the simpler days of the 2002 and the E30 M3.

Speed Secrets Quick Tip: Why Smooth is Fast

Ross has always talked about how smoothness leads to faster speeds, and in this Speed Secrets Quick Tip, he explains why.

Local Motors Currently Building a Crowdsourced Sports Car

Perhaps best known for the Rally Fighter, a Road Warrior-esque V8-powered high speed offroader, Local Motors recently set their sights on designing a new street legal, track-focused sports car.

The Most Significant Car Launch Of The Century: The Tesla Model S Autopilot

Like it or not, the automobile is about to change permanently and dramatically. That change will be built upon the transition from driver-operated to driverless cars.

Ferrari Brings Exclusive Limited-Quantity Roadster to the US with the F60 America

Honoring the 60th anniversary of Ferrari’s North American presence, the Italian automaker has decided to celebrate the occasion by producing a very limited quantity of new open top V12 powered, front engine supercars which will be known as the F60 America.

WR TV: 2015 Alfa Romeo 4C Track Package

In may have been just a few weeks ago that we were behind the wheel of a 4C, but when someone once again handed us the keys to one of the best handling cars on sale – one that’s even sharper and more visceral than the standard 4C – you better believe we jumped at the chance to get behind the wheel.

Update: New Tesla Model S Is Semi-Autonomous, P85D is World’s Fastest Accelerating Sedan

With every lofty claim made and delivered upon, Tesla Motors CEO Elon Musk inches closer to becoming a modern day Howard Hughes (sans the socially crippling OCD).

Rumors: Next Audi R8 to Get Alternative Fuel Powerplants, Lose Manual Gearbox

Audi research and development board member Ulrich Hackenberg had some choice details to share with the UK’s Car magazine, explaining in no uncertain terms that not only will the new R8 share its platform with the Lamborghini Huracán, it will also be available with a choice of gas, hybrid and full el

Preview: 2015 Porsche 911 GTS

Back in March, Porsche announced it was reviving the GTS badge on the Boxster and Cayman models, the first to wear the emblem since the 1963 Carrera 904.

WR TV: 2014 RAM Power Wagon

RAM has a somewhat unique niche with the RAM 2500-based Power Wagon. Less of a bespoke high speed offroader – Mopar has the RAM Runner for that kind of work – the Power Wagon is designed to be something of a heavy duty jack of all trades.