FCX18 Suspension Mod

Description:

I designed these “Flex Blade” arms to get more travel out of the stock suspension when using the stock shocks. I have Treal 4 link arms installed, but it should work the same with the stock links. The mounting for the flex blade utilizes the factory upper link screw and the factory transmission mount screw locations. I have included a .step, .stl, and .3mf files, so, you can use whichever you prefer. I also included a “Low Ride Height” option if you would like to test that out, but I suspect you would need to trim your body for these to work. All the pictures are using the “Stock Ride Height” arm. You should probably add limiting straps to keep the suspension from unloading too easily. I used some small rubber bands going over the factory shock cross bar down to the center of the diff where the upper 4 link bars attach to the diff (see photos).

Printing:

I printed mine with 100% infill and 3 walls. You need 4 pieces. 2 will be normal and 2 will need to be mirrored in your slicer. I printed the part laying flat with all the holes pointing “up”. 

Parts:

I have attached photos showing the hardware.

• “Flex Blades” (4)
• M2 x 16mm (4)
• M2 x 12mm (4)
• M3 x 6 Slotted Roll Pin (4)

Installation:

1. Remove the factory trans mount screws (the 4 inside screws) and replace with M2 x 12mm screw with M3 x 6 Slotted Roll Pin as a sleeve over the screw. These will be your “limiting pins” to stop the travel of the flex blade. (I removed and replaced 1 screw at a time)
2. Remove the factory upper link screws (the 4 outside screws) and install the Flex Blade with M2 x 16mm screws going through the counter sunk hole on the flax blade and into the the upper link. (I used M2 x 16mm, but you could probably use 12mm screws)
3. Once the Flex Blades are mounted to the chassis, they should be screwed into the upper link with the previously installed limiting pins going through the guide slot of the flex blade. 
4. Unscrew the top shock screw and screw into the end of the flex blade.