Performance Crownwheel & Pinion Kits
In a front-engined, rear wheel drive application, the crownwheel and pinion (CWP) transfers engine torque from the propshaft to the car’s differential (LSD) and then to the road wheels via the drive (half) shafts. As a function of this process the crownwheel and pinion ratio is the principal variable controlling the overall gearing, which means that changing it has a significant effect on vehicle performance.
It is extremely important to tailor the CWP ratio to the engine characteristics and desired vehicle speed, whether it is for a road based trackday car or an outright competition vehicle that requires fine tuning from circuit to circuit. This is why Quaife Engineering has made a wide range of Tran-X CWP ratio sets available. The current range includes CWP sets for the Ford English, Atlas, Sierra 7" and Sierra 7½" axles, in ratios ranging from 3.14:1 to 5.86:1
The Tran-X CWP sets are precision engineered using superior high tensile steel billets on industry-leading Gleason gear cutting machines, Manganese Phosphate coated for added wear resistance and finally quality inspected to ISO9001-2008 standards. Quaife can also provide lightweight aluminium alloy differential casings to complete an installation. These offer the twin advantages of making future CWP ratio changes considerably easier as well as reducing overall weight compared to the standard units. The Tran-X components can be supplied separately, or we can build complete differential assemblies incorporating the CWP set, new bearings, oil seals and gaskets. These complete units can be built with either the Quaife ATB or Tran-X LSD differential.
While Tran-X CWP ratios are available to suit a wide variety of performance requirements, we are keen to expand the range. Please contact Quaife’s Technical Sales team for further enquiries.