Most Frequently Asked Questions
General Information Can I convert my electric Rustler or Stampede into a nitro truck? Due the design differences between a gas vehicle and an electric one (chassis, transmission, etc), there are almost no interchangeable parts. It would be much simpler and cost effective to just purchase a vehicle designed from the ground up to handle the power of a nitro engine.  to the top
What type of electric motor can I use with my Traxxas electric car or truck? Traxxas cars and trucks accept most aftermarket 05 hobby-class motors. There are two different types of aftermarket motors which can be purchased for your electric model, stock and modified. Stock motors all have the same wire thickness and number of turns of wire around the armature as governed by sanctioned racing organizations. They are inexpensive, widely available, and more powerful than standard 540-size motors. Modified motors are more expensive and may feature ball bearings. They come in a wide variety of wire thicknesses and number of turns around the armature. The fewer the number of turns of wire on the armature, the more powerful the motor will be. Keep in mind that the more powerful the motor, the less run time you will have from your batteries. High performance motors may be used, as long as they are geared correctly for your model. Modified motors (fewer number of turns) should be geared lower (smaller pinion gear) than stock motors, because they reach their maximum power at higher RPMs. A fast modified motor, which is geared at an incorrect ratio (too high), may actually be slower than a correctly geared stock motor. Because of the extreme variations in intended usages and motors, it is impossible to give exact recommendations for motor and gear ratio selection. Keep in mind this general rule of thumb: Modified motors should be geared 3-5 teeth (48-pitch) lower on the pinion gear than stock motors.Aftermarket stock motors should perform well with the pinion gear that came with your model, or perhaps with a gear that is 1-3 teeth larger. If you are worried that you might be under or overgeared, check the temperature of the batteries and the motor. If the batteries are extremely hot, and/or the motor is too hot to touch, your model is probably overgeared. If you are not able to run your model for at least five minutes before the batteries die, then you should switch to a lower gear ratio (smaller pinion gear or larger spur gear). On the other hand, if the motor and batteries are just slightly warm, you may be able to increase the gear ratio slightly (larger pinion gear). This temperature test assumes that the model is close to factory stock weight and operates freely with no excessive friction, dragging, or binding (these things also affect motor and battery temperature). All high-quality, aftermarket stock motors will work well in all Traxxas electric models. For modified motors, we recommend limiting the number of turns to 16 in buggies and 17 in trucks. This provides a good balance of run time and speed. More radical motors can be used however, proper gearing becomes very critical, and high-quality batteries will be required for long run times. to the top Do you have any set-up tips for parking lot racing my electric 4-Tec? Here are a few tips when parking lot racing your electric 4-Tec. You will want to use 40 wt. shock oil in all four shocks, use two-hole shock pistons, and put the small shock spacers on your two front shocks and the medium shock spacers on your two rear shocks. Another good idea is to get a foam bumper for the car, part #4835. To get more "hook-up" in your front-end, run your front ball differential a little looser (not much) than your rear diff. to the top What other things will I need to buy when I purchase a Traxxas kit? Kits require some basic tools to complete the assembly, such as: Phillips screwdrivers, flat blade screwdriver, locking pliers, needlenose pliers, hobby knife, and superglue. When buying a kit, you will also need to purchase a two-channel radio system separately. Part #2203 is our TQ radio system which includes a transmitter, receiver, and two servos. The electric kits come with a mechanical, rotary speed control; but if you wanted to upgrade right from the get-go, you could purchase part #2204. Part #2204 is our TQ radio system which includes a transmitter, receiver, one servo, and an electronic speed control. The electronic speed control takes the place of the mechanical speed control and a servo. It eliminates the problem of losing control of the vehicle as the battery is discharged, it gives you proportional forward/reverse control, and it will increase your run time because of its efficiency. You will also need to purchase a 7.2 volt 6 cell battery pack and charger, which we do not manufacture. You can purchase these along with the kit and radio system at your local hobby shop. to the top What else do I need to purchase to operate my RTR (ready-to-run) model? All of our ready-to-run, electric vehicles come fully-assembled with the Stinger 20-turn motor, mechanical speed control (except for the Sledgehammer which comes with the XL-1 ESC), two standard servos, 27mHz receiver and pistol-grip transmitter. The only things you will need to purchase separately to operate your model are a 7.2 volt, 6-cell battery pack and a charger. to the top What would changing the stock gearing on my motor do to the performance of the model? In general, installing a smaller pinion gear will give you better acceleration while installing a larger pinion gear will improve your top speed. The opposite can be said to be true when changing your spur gear. A smaller spur gear will give you better top speed while a larger spur will increase your acceleration. When making changes to your model's set-up, it is best to make one change at a time, testing after each change and recording your findings. to the top How can I get more rear traction from my model? To soften your rear suspension for more traction, you can use a softer (lower spring rate) spring. Installing a softer spring requires thinner viscosity shock oil. You will also want to make sure you are using at least a three-hole piston. The more holes in your piston, the less pack your shock will have. Setting up your shocks for optimum performance for your running conditions is all about experimentation. There is no set formula or rule to determine correct settings for your vehicle. When making changes to your set-up, you should keep a log of the changes you make and make only one change at a time, testing after each change to check the vehicle's performance. to the top What does the TQ radio system include? The Traxxas Top Qualifier (TQ) radio is now available as a complete system for use in any kit with 2-channel requirements. This is the same high-quality, high-power radio system now included in Traxxas ready-to-run cars and trucks. The new transmitter features a distinctive, ergonomic contour grip, which feels natural and comfortable to hands of all sizes. Batteries are arranged in a single layer with a "large-footprint" base for unmatched stability and balance. The radio system is available in two configurations. Model 2203 comes with the TQ transmitter, B.E.C. receiver, two standard servos, and battery holder with on/off switch. Model 2204 replaces one of the servos with our reliable and efficient, XL-1 forward/reverse electronic speed control. Features include: high power output, servo reversing, electronic trim controls, low battery indicator, retractable antenna, and 50/50 or 70/30 trigger neutral adjustment. to the top What shock springs should I use on my model? Shock springs are classified by spring rate, which is the stiffness of a spring, i.e., its resistance to being compressed. A stiffer spring (one with a higher spring rate) will require more force to become compressed, and will release more energy as it rebounds. Using stiffer springs on your shocks will make the vehicle's suspension respond more quickly, but less likely to absorb smaller bumps. Softer springs will respond more slowly, but will allow the suspension to better absorb small bumps. The rate of spring that you will want to use on your shocks will really depend on the terrain that you are running on. As a general rule, the greater amount of available traction, the stiffer the spring you will need to use. On the other hand, if the traction is low, the springs usually need to be softened. A lighter spring will allow the weight of the chassis to transfer more. Installing softer front springs on your vehicle will increase your steering. You will get more rear traction if you use softer rear springs. Keep in mind that installing a softer spring requires less damping (a thinner shock oil). If the spring rate is increased (stiffened), a heavier shock oil will be required to keep the vehicle from bouncing. to the top My car starts to go as soon as I plug in my battery pack. What should I do? Make sure that you always have your transmitter turned on before you plug in your battery pack. If you send power to the receiver before you send it a signal, the receiver will pick up stray signals and cause your model to act erratically. If you have your transmitter turned on when you plug in your battery pack and the car still takes off immediately, you will need to re-center your throttle servo. Basically, all you do is unscrew the mechanical speed control from your throttle servo. With your transmitter on, trim settings at zero, and batteries plugged in, adjust the speed control to a neutral position and screw the speed control back onto the servo making sure not to bump the speed control out of its neutral position. Which motor comes stock on my Traxxas electric model? The electric motor, that comes stock on all of our electric models, is the Stinger 20-turn motor. This is a mild, modified motor that is 20% faster than a typical, stock motor. Part #1275-Stinger motor, 20-turn to the top
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