nothingmuchdave

Front One Way...

Just as described, the front wheels are only allowed to turn one way... A one way bearing in the diff prevents the tire from spinning backward... While on power, both front wheels get equal power (no differential action)... Off power, the front wheels free spin on their own accord... This give high initial turn in, and allows you to really pull through the exit of a turn, as both front wheels are applying maximum power to the ground... Breaking becomes an issue, as the nature of the one way does not allow breaking to effect the front wheels... In effect, its like yanking the e-brake on a car... With out proper attention, this causes the car to loop out much easier, and makes it twitchier at speed...

The benefit of front one way on RC drifting is to minimize understeer... When using front ball diff, more understeer will occur and it is very hard to drift in tight and S-turn corner... Besides that, the angle that the car make is not that beautiful... The downside of using front one way is the car is harder to drive... But once you master it, it is actually as easy to drive as a front ball diff... Most RC drifters prefer to use front one way over ball diff...

Rear Ball Diff...

So what is a ball diff??? It’s a clever little device that takes up the difference in rotating speed between the left and right side driven wheels... Unless a four-wheeled vehicle is traveling perfectly straight, its left and right side wheels travel on different paths, at different speeds... The diff compensates for this while providing drive force to propel the vehicle... Without a diff, one or both of the driven wheels would be dragged across the road surface, resulting in a loss of traction...

Difference Between One Way And Ball Diff...

This is the limited edition damper by Tamiya Racing Factory (TRF)... The damper shaft is coated with titanium nitride... The titanium nitride coating offers a much harder surface than the stock fluorine coated shafts improving the life of the shaft and increasing time between rebuilds... The titanium nitride surface is also very smooth providing an ultra smooth compression and rebound action...

TRF damper with aluminum damper retainer 1mm down type...

Because springs tend to vary in length, Tamiya now offers aluminum damper retainers featuring a spring support surface that is 1mm lower than standard... This provides much more flexibility with both Tamiya and aftermarket spring choices...

In order to prolong carbon parts, it is advise to apply a layer of CA glue to the edges... Besides that, it is even better to use a very fine sand paper to sand off the rough edges... The reason for all these is to minimize crack due to collision...