Every car has at one, but yet it’s one of the most misunderstood areas of a car’s performance. We are of course talking about diffs, or differentials to give their full name. There are a number of types of diff available, each one having its own unique characteristics. Some will be suited to road cars, some to race cars, and some to off-roaders. Also, diffs in front-wheel-drive, rear-wheel-drive, and 4×4 cars will all need to behave differently to give optimum performance. And there’s also the ‘electronic’ diffs which utilise on-board computer systems to work in conjunction with mechanical components to deliver improved performance.

So, let’s take a closer at the different types available, get our heads around how they work, and try to understand which one is best for you…


Read the full feature in the October 2019 issue…



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