Originally designed to mount a Wild Turbo Fan (WTF) on a 2wd Slash. Should fit any standard 30mm fan.
This motor fan mount attaches to the gearbox by removing the topmost two screws (highlighted in the exploded view) and attaching the fan mount. Replace the original screws with 3x25mm button head screws (like Traxxas #2581) as the mounting wall is 2mm thick and the original screws are 23mm. Reusing the original 23mm screws will work in a pinch.
Designed for a 2wd Slash (pictured), but will also fit the 2wd Stampede, Rustler, and Bandit. Fan angle is 30 degrees.
You'll need 2 or 4 3x15mm (Traxxas #2579) or 3x16mm button head screws and M3 nylock nuts to secure the fan to the mount. Using only two (in opposite corners of the fan) works just fine.
Because of the way the tab is oriented (for easy fan installation), this must be printed with supports. For best results in Cura, I set Support Placement to "Touching Built Plate" so it doesn't infill the screw holes.