Here is the list of parts required to convert your Ascender transmission to a 2 Speed and a link to the instruction manual below.
Note that you will need a "Mini" servo to operate the shifting, at least a 3 channel receiver and a transmitter with a 3rd channel/button with "2 position switch"
Parts needed:
VTR232009 Transmission Metal Gear Set: Twin Hammers
OR
VTR232000 Transmission Molded Gear Set: Twin Hammers
VTR232008 High- & Low-Speed Gear Set: Twin Hammers (Top shaft gears)
VTR332009 Transmission Shift Fork & Shaft: Twin Hammers
VTR232007 Transmission Shift Linkage Set: Twin Hammers (the picture is old on our site, the current parts should have a spring and 2 piece arm that acts as a servo saver)
VTR232017 Transmission Shaft Set: Twin Hammers (sorry guy, you only need the small aluminum spacer and we only offer it in this set)
VTR237003 4mm x 8mm x 3mm Ball Bearing
VTR237004 5mm x 10mm x 4mm Ball Bearing x 2
VTR236131 E-Clip 3mm (10)
VTR236013 M2.5 Nylock Nut (10)
LOSA6356 5&6mm Shim set 5x7x.02mm shim This is the only way we sell the shims by themselves.
Link to Twin Hammers Kit Instruction manual
You will use the following steps:
A-2 thru A-6 (Disregard the outer standoff mount in A-6)
A-12 and A-13
One tip is to make sure the shifting shaft that slides in and out of the transmission case has a smooth finish to it. For the most part, our production parts have a smooth finish but I've seen some with a slightly rougher texture and this can cause the shaft to stick in the transmission case, making it harder to shift. I always polish it to make sure it's smooth.
Rich