Traxxas TRX4 - Build log, Part II
Time to start the building process!
As I´ve been into car-racing for my entire life this is really something new. I have for sure built other kits like Tractor-trucks, buggies and largescale racecars but never ever have I built a Traxxas car in kit form.
The manual is eally easy to follow and my 5 year old started as soon as we opened the right bag.
All bags are marked and tagged in the manual. In each bag you will also find the corresponding screw set.
The quality of the all metal gears are really good. It has a fine pitch and wide gears that should be tough enough to withstand the abuse the Hobbywing brushless motor. I opted for the Hobbywing AXE 2100Kv setup as this had great reviews from my friends.
Included tools
The tools supplied is standard quality but I was glad to se a ball-hex driver. The included grease for the gears are of a really sticky green sort of grease.
Central transmission - 2 speeds
The central transmission houses a 2-speed gearbox and its construction makes gear-shift on the fly possible. The servo operated cam shift where the rotating force is engaged. Everything is nicely sealed. The incoming shifter axle goes thrue a rubber gasjet and the two housings are interlocking.
Here is a picture of the rear side and the outgoing axle for the rear drive.
The transmission have a slipperclutch on the incoming axle. I tightened this by feeling. Just hold the outgoing axle with an allen key and you should just be able to start rotating the main gear. To hard and you will strip your gears, to loose and you will generate excessive heat and too little of acceleration.
The completed central gearbox from the rear view. The included servo for gearshifting should be waterproof.
And from the front side…
Part III will be the main axles.
All the best.
Marcus