Neither
I got my Engine Mounts back yesterday and i'll put some pics up on the weekend.
Just waiting on my Diff which they say will be here be the end of next week
Thought i'd post up some of the key reasons i went with the Quaife over the TRD One..
Why not use a traditional, plate style limited-slip differential?
Method one is to use a traditional, plate style limited slip differential, the type of which is used commonly in racing and rallying. This uses a pack of clutch plates worked by sun and planetary gears to transmit a set percentage of the torque to the spinning wheel (say between 40 and 50%.) Certainly these units are effective in increasing traction, but they do have negative implications on both driver enjoyment and vehicle longevity. In some applications on very high performance cars the LSD's clutch plates are now engaged using computer-controlled electro-hydrualic action, with obvious cost implications.
i) Potentially negative dynamic effects
Unless it's set up correctly, a plate-style LSD can ‘snatch' as it suddenly locks to maximum torque transfer. This is particularly noticeable in a front wheel drive car, usually when driven rapidly along a bumpy road, as the vehicle will tend to skip from bump to bump as the LSD tries to transfer the torque to the unloaded wheel. A similar effect will be experienced in a powerful rear wheel car, albeit not felt directly through the steering, but nonetheless this can compromise driver enjoyment.
ii) Long term maintenance implications
The traditional style LSD's reliance on clutch plates, as well as sun and planetary gears for operation ultimately leads to wear on these components when used hard. For example, it's not uncommon for high performance track / rally cars to undertake a differential rebuild at least once a season.
d) The Quaife Engineering Automatic Torque Biasing differential
The second mechanical method of improving traction is to use a Quaife Automatic Torque biasing differential. Rather than using clutch plates as a method of operation, the Quaife ATB uses sets of floating helical cut gear pinions that run in pockets and mesh during normal driving.
Should one of the driven wheels start to spin however, the helical gears start to generate a torque bias thanks to the axial and radial thrust of the helical gear pinions in their pockets. The result is a progressive transfer of torque away from the spinning side of the axle to the driven wheel, which is now capable of transmitting a greater proportion of torque.
i) Positive dynamic effects
Because the Quaife ATB differential's design produces a progressive transfer of torque away from the spinning wheel to the wheel that's capable of driving, the effect is far more benign to the driver. In a front wheel drive car harsh snatching and torque steer are eliminated, so much so that it's not uncommon for a Quaife ATB differential to cope with 400bhp through the front wheels in aftermarket road applications.
For rear wheel drive use the benefits of the Quaife ATB diff are obvious - excellent tractive qualities, combined with a progressive action, making for a benign, effective and involving package for those seeking the ultimate in safe high performance vehicle dynamics.
ii) Maintenance free performance
That's right, unlike a plate style LSD the Quaife unit delivers its performance without the need for stripdowns and rebuilds. There are no plates or gears to wear or break and the ATB units retain standard vehicle lubrication.
