Limited Slip DIff
One of the problems with my car is traction out of tight corners on trackdays. This was highlighted most at Croix-en_ternois in France but also manifested itself at Cadwell on the slower tighter corners. In order to make the car more driveable on track I have decided to fit a Quaife Automatic Torque Biasing (ATB) unit into the standard Sierra diff which is fitted to my car. At the same time I hope to change the ratio from 3.92:1 to 3.62:1, which should reduce engine revs while touring, increase top speed slightly and hopefully make the car more enjoyable to drive without too much loss of acceleration.

Quaife ATB Cutaway picture

This is what the inside of a Quaife ATB looks like, it's entirely gear driven and doesn't rely on any viscous oils or friction plates to transfer the traction. The build quality is excellent and those people who I spoken to that have used them say they are very good.

Complete Quaife ATB

This is what the complete unit looks like. It fits inside a Sierra diff and the half shafts slide in as normal. Note that if you want to use one of these on a Westfield then you'll have to buy some new half shaft flanges from Quaife because the circlips won't fit in with the ATB in place. These cost about 200 quid and need to be added to the price of the diff.

To find out more about Quaife ATBs and their complete product range click on the logo below.

RT Quaife Website