It’s one of the best up­grades you can make to a mod­ern fast Ford, so let’s see ex­actly what’s in­volved with fit­ting a Quaife ATB dif­fer­en­tial…

Fast Ford - - Contents - Words & Pho­tos JAMIE

What's in­volved with in­stalling a Quaife ATB diff?

If you read our fea­ture last is­sue look­ing at how an Au­to­matic Torque Bi­as­ing diff trans­forms the han­dling of a fast Ford – es­pe­cially cars like the new Mk8 Fi­esta ST and the four-wheeldrive Mk3 Fo­cus RS – then you’ll no doubt want one fit­ted to your car. If you haven’t read the Au­gust is­sue, then grab a copy to see what key mem­bers of the Ford Per­for­mance team, Ja­mal Hameedi and Leo Roeks, and Michael Quaife of Quaife En­gi­neer­ing have to say about the per­for­mance ad­van­tages an ATB dif­fer­en­tial can bring to a fast Ford.

We’re pretty sure you’ll be con­vinced. In fact, we’re so con­fi­dent you’ll want to fit a Quaife ATB that we’ve gone a step fur­ther and teamed up with the guys at moun­tune to show you ex­actly what’s in­volved with hav­ing one fit­ted. The Mk3 Fo­cus RS may have missed out on hav­ing an ATB fit­ted at the fac­tory, but thank­fully you can at least have one retro-fit­ted. And if you have the work done at moun­tune HQ or any moun­tune-ap­proved Ford dealer, it doesn’t af­fect the ve­hi­cle’s base war­ranty.

The ben­e­fits are well pub­li­cised, and af­ter driv­ing an RS Edi­tion model (which does come with an ATB as stan­dard) we were to­tally con­verted. We needed one on our own RS. But it’s not just RS own­ers that can ben­e­fit from an ATB up­grade – any fast Fo­cus or Fi­esta owner should con­sider one.

But enough of the rea­sons to fit one, what’s ac­tu­ally in­volved with in­stalling an ATB? Well, quite a lot as it turns out. It’s def­i­nitely a job best left to the ex­perts! To show ex­actly what’s in­volved we shad­owed the tech­ni­cians at moun­tune as they in­stalled a Quaife ATB to our very own Fo­cus RS. Here’s just what the up­grade in­volves…


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