As we continue through the assembly we run into the Achille's Heel of the Redcat Everest 10 - the plastic differential. The gear itself seems of good quality, at least to me, but the differential case serves double duty. Pics below show Everest-10 on left, SCX10 on right.
The two units themselves
as an assembly are completely interchangeable in all aspects - the bearings, the gears, housings and bearing dimensions swap back and forth 100%. If you want to swap in SCX10 axles this helps to make it easy.
Below you can see your options, at least as I know them ...
Option 1 - remove the upstand within the diff case the the axle dogbone ends slide into. Use whatever method you find best suits your needs (drill, Dremel, chisel, lightning bolt ... ). Then use Axial Heavy Duty Locker part number AX30500. There are TWO to a single package, so you only need to order one of this part number to do both ends of your E10.
Option 2 - use Redcat differential case part number 2039. This is the same unit that comes in MANY of their 1/10 cars, buggies and trucks. It convenienttly does not have the protrusion as you can see in the pics, so no need to get dirty. Also use Axial Heavy Duty Locker part number AX30500. Both part numbers are TWO to a single package, so you only need to order one of this part number to do both ends of your E10.
Option 3 - use Axial Diff Case Small part number AX80002 and Heavy Duty Locker part number AX30500. As with the Redcat version of the swap you only need to get ONE of each package as there are two parts, so enough to do both ends of your truck.
As of writing this, January 11 2015, Redcat Racing Everest 10 pdf manual shows part number 180009 "connect box" to be an aluminum differential assembly. Their webiste verifies this, but currently shows no stock. Hopefully this tells use about an alternative in the future.
Also, with this regard. those paying close attention will note that I mentioned swapping the differential
as an assembly, but am also showing individual part swap options. The compatibility of these individual parts that make the assembly is such that you can also swap gearsets. Want to run overdrive in one axle or underdrive in the other? Sure, go ahead and get to proper Axial part numbers and have at it!
(singing) The diff locks connected to the dogbone ...
... but none of it will go together properly without SOME material removal. It's a necessity. To run Axial axle dogbones you MUST remove material somewhere. Below you can see a stock Axial front axle dogbone in the Everest 10 axle housing. At the left side you can see flange that the bearing would ride against is protruding from the housing end. This is undesireable. In order to fix this you need to remove material from the end that slides into the diff locker. This is only necessary on the one side. The opposite side, shown second pic below, shows the oppisite effect, so no material removal required.