New from RCshox.com! Finally a solution to broken idler gears and slipper compensation! Introducing the RCshox center dif conversion for the SC10 4X4, this conversion kit transforms your SC10 4x4 to the beast that it should be! still making minor changes but pre-orders will begin on Dec 12th, there will be no extra's made on the first run so make sure you get your pre-order in!
Kit will consist of:
2 hardened dif rings
10 carbide balls
1 modified 60t spur gear (for now it will be an AE spur and only 60t will be available)
2 ring adapters
and a few other knick knacks which are still being adjusted
pre-orders will be 45.00
The center dif is actually a center ball dif conversion, just like any center dif it transfers power away from where it is not needed. There are many benefits to this one being that you decrease damage to the idler gear which has been a soft spot on our trucks! If you watch the video you will see that on the first lap i was driving crazy just to show that you can be really aggressive and the truck will not "spin" around, it pretty much follows where ever the front wheels are pointed, on low traction it is superior and on high traction the acceleration is stunning especially coming out of turns. You also increase corner speed because the front is not locked down to the rear, braking is also better.
With a slipper slipping you are always losing power, with the center dif all of the power is going somewhere at any givin time!
Center dif installation:
its pretty straight forward and i will have a video in a day or so
use the black/thrust grease on the factory thrust assembly
use only a light coat of ball dif grease on the balls themselves
tighten the nut all the way down until the coil is fully compressed
use a very small amount of blue loctite on the shaft.
Ok folks since the beginning of the center dif revolution it has been a known fact that some of its shortcomings were the ability to adjust "dif" action. Seeing as it is a ball dif no where in the existence of RC has there been an adjustment for this type of differential . Well once again RCshox, as promised, is changing the history of RC racing! It took me a long time to get this perfected and i have spent countless hours at the track, on the CNC machine and doing CAD work on my PC and have come up with an amazing solution. But before I get to that there is another issue with the system that not many of you are aware of. The thrust bearing assembly only uses one hardened washer from the factory which is fine with a slipper because it is all that is needed but since the Cdif is constantly working over time the "hat" washer wears a groove and becomes gritty. I also felt i needed to address this problem so I had some thrust bearings custom made for the SC104x4 as well as a custom spacer to make it all fit! Now back to the actual ball dif,
this is the power chain:
pinion to spur
spur to carbide balls
balls to dif rings
dif rings to F/R dif
The balls are what is actually doing the differentiating and by nature it is a smooth process. That is wonderful for a front or rear differential because the driving force is going the same way with basically the same force. But on a center ball diff it has the tendency to quickly go to where traction is the least available hence "diffing" out on high bite tracks. So here is the RCshox solution (this is just a demo drawing, not to scale or even accurate)
So here is how this works: When accelerating, the spur gear drives the pins into the balls, since both the pin and the ball are hardened (pin is not as hard as the ball) it will slow down the ball since it is a single pressure point instead of a concave pressure point that gives virtually no resistance. This is adjustable via the number of pins you install in the spur gear. You want "thick" dif action load up all 10 pins for a high bite track! you want "thin" dif action (low bite track) take them all out! and anything in between for different track conditions/ grip levels. There are other benefits to this as well, since it is pressure sensitive the harder you accelerate the tighter the dif becomes so you get the same "loose" dif benefits under deceleration, very controlled braking as well as better "in air" adjustments. This IS the ultimate upgrade for your SC10 4x4!
V2 installation by Cameron Kellog!