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24 • TRAXXAS RALLY

MOTOR AND GEARING

Extensive testing has been done to determine the best gear ratio 
for your model. The stock gearing balances power, speed, and 
efficiency to optimize the performance of the model. However, 
you may wish to try different gear ratios in order to customize the 
performance of your model. The gearing chart on this page shows 
appropriate gearing for the model. 

 
By installing a pinion with fewer teeth, or a spur gear with 
more teeth, the transmission’s final drive ratio is increased. 
This means greater rpm is required to achieve a given speed. 
Using a numerically higher gear ratio will increase torque, but 
reduce top speed. Installing a pinion with more teeth, or a spur 
gear with fewer teeth, will decrease the final drive ratio, which 
will generally increase top speed but reduce torque. However, 
installing too large a pinion will “overgear” the car, which will 
reduce performance and may overheat the motor and speed 
control. Use the following formula to calculate the overall ratio for 
combinations not listed on the gear chart:

Motor Installation

To access the motor, 
remove the gear 
cover by removing 
the single screw on 
the top of the gear 
cover. The motor 
uses an aluminum 
mount for quick, 
easy motor access and gearing adjustment. 
To remove the motor, first open the right 
battery door and slide out the ESC. Next, 
remove the single large hex screw using the 
supplied 2.5mm wrench.  Then rotate the 
motor and mount to the side of the model, 
and slide backward off the post.

The motor mount is carefully engineered 
to provide additional features and 
adjustability.  Two sets of holes are 

provided for use with brushed and brushless motors.  The holes for 
brushed motors are spaced 16mm apart and accept 2.5mm screws. 
The holes for brushless motors are spaced 19mm apart and accept 
3mm screws.

Pinion Gear Installation Instructions

1.  Remove the motor as described  

previously in 

Motor Installation

. 

2.  Use a1.5mm wrench to loosen the 

pinion’s set screw. Remove the pinion. 

3.  Place the replacement pinion gear onto 

the motor shaft. Align the set screw 
hole with the flat side of the shaft. 

4.  Thread a 1.5mm set screw into the 

pinion gear but do not tighten it yet. 

5.  Slide the pinion gear down the motor shaft so the wrench shaft 

fits into the notch in the motor mount, as shown. Tighten the 
set screw. 

Adjusting Gear Mesh

Incorrect gear mesh is the most common 
cause of stripped spur gears. Gear mesh 
should be checked and adjusted anytime 
a gear is replaced. Access the gears by 
removing the single screw on the top  
gear cover. 

To set the gear mesh, cut a narrow strip of 
notebook paper and run it into the gear 
mesh of the motor. The motor is mounted 
to an aluminum motor mount. Loosen the 
single motor mount screw with the provided 
2.5mm wrench to slide the motor mount. 
Slide the motor and pinion gear into the 
spur gear. Retighten the motor mount screw 
and then remove the strip of paper. You 
should be able to run a fresh strip of paper 
through the gears without binding them.

TUNING ADJUSTMENTS

Motor Mount 

Screw

Do Not Loosen

# Spur Gear Teeth

x 5.04 = Final Gear Ratio

# Pinion Gear Teeth

  Brushed Motors

  Brushless Motors

Motor Mount Positions

Gearing Compatibility Chart

This chart shows a full range of gear 
combinations. The gear combinations in gray 
are not suitable when using the included 
6-cell battery, speed control and motor. These 
gear combinations have been included in this 
chart as they may be used with certain other 
aftermarket equipment combinations.  

Spur Gear

Pinion Gear

45

50

55

11

-

-

25.20

12

-

-

23.10

13

-

-

21.32

14

-

-

19.80

15

-

-

18.48

16

-

15.75

17.33

17

-

14.82

16.31

18

-

14.00

15.40

19

-

13.26

14.59

20

-

12.60

13.86

21

10.80

12.00

13.20

22

10.31

11.45

12.60

23

9.86

10.96

12.05

24

9.45

10.50

11.55

25

9.07

10.08

11.09

26

8.72

9.69

10.66

27

8.40

9.33

10.27

28

8.10

9.00

9.90

29

7.82

8.69

9.56

30

7.56

8.40

9.24

31

7.32

8.13

8.94

   

Stock setup

   

High Speed Gearing

   

Acceptable range

Содержание 18 Kyle Busch

Страница 1: ...MODEL 7307 owner s manual ...

Страница 2: ...e want you to feel confident that you own one of the best performing models in the market and that it is backed by a team of professionals who aim to provide the highest level of factory support possible Traxxas models are about experiencing total performance and satisfaction not just with your model but also with the company that stands behind it We know you re excited about getting your new mode...

Страница 3: ...Technical assistance is also available at Traxxas com You may also e mail customer support with your question at support Traxxas com Join thousands of registered members in our online community at Traxxas com Traxxas offers a full service on site repair facility to handle any of your Traxxas service needs Maintenance and replacement parts may be purchased directly from Traxxas by phone or online a...

Страница 4: ...ave been damaged in any way Do not use battery packs that have damaged wiring exposed wiring or a damaged connector Children should have responsible adult supervision when charging and handling batteries LiPo Batteries Lithium Polymer LiPo batteries are becoming popular for use in R C models due to their compact size high energy density and high current output However these types of batteries requ...

Страница 5: ...ually smooth the decal down with your finger as you go This will prevent air bubbles Placing both ends of the decal down and then trying to smooth it out will result in air pockets Look at the photos on the box for typical decal placement TIRE GLUING The factory tires on your model are already glued to the rims The tires must be glued to the rims to prevent the rims from spinning inside the tires ...

Страница 6: ...ear Body Mount Hex Hub Rear Suspension Arm Axle Carrier Pivot Ball Turnbuckle Light Pipe Receiver Box Steering Servo Front Body Mount Battery Compartment Door Battery Compartment Vent Electronic Speed Control VXL 3m Motor Velineon 380 Battery Door Release Tab Slipper Clutch Rocker Rocker Push Rod Push Rod Spring Preload Adjuster Traxxas High Current Connector ...

Страница 7: ...ntenna mast in the model Driving tips and adjustments for your model 4 Install batteries in the transmitter See page 11 11 Maintaining your model See page 26 The transmitter requires 4 AA alkaline or rechargeable batteries Follow these critical steps to maintain the performance of your model and keep it in excellent running condition 5 Install the battery pack See page 11 Install the included batt...

Страница 8: ... coils on the perimeter of the motor can and the magnets are mounted to the spinning rotor shaft Cogging Cogging is a condition sometimes associated with brushless motors Typically it is a slight stutter noticed when accelerating from a stop It happens for a very short period as the signals from the electronic speed control and the motor synch with each other The VXL 3m is optimized to virtually e...

Страница 9: ... by adjusting the throttle and steering trim sliders on the face of the transmitter Thermal Shutdown Protection Temperature sensing electronics used in the electronic speed control detect overloading and overheating of the transistor circuitry If excessive temperature is detected the unit automatically shuts down to prevent damage to the electronics 2 channel radio system The TQ radio system consi...

Страница 10: ...CTRONIC SPEED CONTROL Your model is equipped with the newest Traxxas 2 4 GHz transmitter with Traxxas Link The transmitter has two channels for controlling your throttle and steering The receiver inside the model has 5 output channels Your model is equipped with one servo and an electronic speed control TQ 2 4GHz Transmitter Antenna Steering Trim Multi Function Knob Throttle Trigger Throttle Neutr...

Страница 11: ...e set screw with the included 1 5mm wrench When reinstalling the antenna slide the antenna wire into the bottom of the antenna tube until the white tip of the antenna exits the top of the tube Carefully curve the white tip over the antenna tube and install the antenna tip to hold it in place Next insert the antenna tube into the mount Make sure the antenna wire is in the antenna mount slot then in...

Страница 12: ... chemistries or capacities Using an Additional Battery For Increased Speed An additional battery may also be used to increase the top speed of your model to 50 mph by connecting the batteries in series using a Traxxas series connector Part 3063 sold separately This also requires a gearing change as described on page 24 50 mph Battery and Gearing Installation Instructions 1 Install the included hig...

Страница 13: ...een the receiver and the transmitter Loss of the radio signal can cause you to lose control of your model TQ 2 4GHz Radio System Basic Adjustments Throttle Neutral Adjustment The throttle neutral adjustment is located on the transmitter face and controls the forward reverse travel of the throttle trigger Change the adjustment by pressing the button and sliding it to the desired position There are ...

Страница 14: ...s when the throttle trigger is at neutral Warning Do not apply full throttle in forward or reverse while the model is elevated 8 Once adjustments are made turn off the receiver on your model followed by the hand held transmitter Range Testing the Radio System Before each running session with your model you should range test your radio system to ensure that it operates properly 1 Turn on the radio ...

Страница 15: ...tial effect is indicated as a percentage the greater the percentage the greater the effect The illustrations to the right show how this works Normal Steering Sensitivity 0 exponential In this illustration the steering servo s travel and with it the steering motion of the model s front wheels corresponds precisely with the steering wheel The ranges are exaggerated for illustrative purposes Decrease...

Страница 16: ...hear the steering servos jump but the LED may not stay on 2 Apply forward throttle The LED will turn off until full throttle power is reached At full throttle the led will shine RED 3 Move the trigger forward to apply the brakes Note that braking control is fully proportional The LED will turn off until full braking power is reached At full brakes the LED will shine RED 4 Return the throttle trigg...

Страница 17: ...rcuitry constantly monitors the battery voltage When the battery voltage begins to reach the minimum recommended discharge voltage threshold for LiPo battery packs the VXL 3m will limit the power output to 50 throttle When the battery voltage attempts to fall below the minimum threshold the VXL 3m will shut down all motor output The LED on the speed control will slowly blink red indicating a low v...

Страница 18: ...s of batteries that are available and the methods with which they can be charged it s impossible to give exact run times for the model Another major factor which affects run time is how the model is driven Run times may decrease when the model is driven repetitively from a stop to top speed and with repetitive hard acceleration Tips for Increasing Run Time Use batteries with the highest mAh rating...

Страница 19: ...ubmerge the motor under water Do not gear the motor by temperature when running in wet conditions The motor will be cooled by water contact and will not give an accurate indication of appropriate gearing After Running Your Vehicle in Wet Conditions 1 Drain the tires by spinning the tires at full throttle to sling the water out An easy way to do this is to remove the body and set the model upside d...

Страница 20: ...e receiver Receiver Installation 1 Route the antenna wire out of the receiver box cover A Place the cover on the chassis 2 Route the servo and speed control leads into the receiver box cover Use the molded in wire guides to align the servo and speed control leads and antenna wire B 3 Apply a small bead of silicone grease Traxxas part 1647 to the wire clamp C 4 Install the wire clamp and tighten th...

Страница 21: ...spension damping effect Changing the oil to a higher viscosity oil will increase damping Lowering the viscosity of the oil will cause the suspension damping to be reduced Damping should be increased with higher viscosity oil if the model is bottoming easily over bumps Damping should be decreased with thinner viscosity oil if the model is hopping over small bumps and feels unstable The viscosity of...

Страница 22: ...ear wheels as viewed from above see the diagram below The handling of your model can be adjusted by altering the front and rear toe angles Front Toe Adjustment The toe in of your model s front wheels can be adjusted by threading the front pivot balls in or out of the suspension arms Threading the upper and lower pivot balls into the arms by turning them clockwise will increase toe in Threading the...

Страница 23: ...d for use in your model Your model s gear differentials have been tuned specifically to provide balanced handling and authentic rally style drift cornering The front differential has been filled from the factory with high viscosity 50 000W silicone oil The 50 000W oil allows the front wheels to pull the car through the turn when counter steering through a drift Increasing the fluid viscosity incre...

Страница 24: ...tions 1 Remove the motor as described previously in Motor Installation 2 Use a1 5mm wrench to loosen the pinion s set screw Remove the pinion 3 Place the replacement pinion gear onto the motor shaft Align the set screw hole with the flat side of the shaft 4 Thread a 1 5mm set screw into the pinion gear but do not tighten it yet 5 Slide the pinion gear down the motor shaft so the wrench shaft fits ...

Страница 25: ...d rally and gymkhana style drift cornering but also provides sufficient traction for straight line acceleration and high speed driving This allows the model to perform exciting drift maneuvers without the hard to control driving on ice feeling typical of solid plastic drift tires that do not provide enough grip for high performance driving You model is equipped with standard size touring car wheel...

Страница 26: ... shocks full Use only 100 pure silicone shock oil to prolong the life of the seals If you are experiencing leakage around the top of the shock inspect the bladder in the top cap for signs of damage or distortion from overtightening If the bottom of the shock is leaking then it is time for a rebuild The Traxxas rebuild kit for two shocks is part 7062 Suspension Periodically inspect the model for si...

Страница 27: ...not have a servo operated brake but the Braking Percentage function still operates the same way in electric models Turning the Multi Function knob full clockwise will deliver maximum brake throw turning the knob counter clockwise reduces brake throw Note Turning the dial counter clockwise to its stop will eliminate all brake action Throttle Trim Setting the Multi Function knob to serve as throttle...

Страница 28: ...imes repeatedly 4 Press SET once The status LED will blink green once repeatedly 5 Press MENU once The status LED will blink green twice repeatedly 6 Press SET The memory is now selected to be deleted Press SET to delete the model Press and hold MENU to return to driving mode Failsafe Your Traxxas radio system is equipped with a built in failsafe function that returns the throttle to its last save...

Страница 29: ...ve Push forward to desired endpoint and press set to save To reset max throw Let go of controls and press SET The menu tree below shows how to navigate through the TQ 2 4GHz transmitter s various settings and functions Press and hold MENU to enter the menu tree and use the following commands to navigate through the menu and select options MENU When you enter a menu you always start at the top Pres...

Страница 30: ... Press SET green LED blinks Press SET red LED blinks x3 Press MENU twice red LED blinks x3 Turn steering wheel to desired max left and right travel x8 Press SET to save each position Turn steering wheel to test settings IF END POINTS ARE OK Press hold MENU returns to driving mode IF END POINTS NEED TO BE CHANGED Press SET and repeat steps 6 8 To reset the END POINTS of STEERING servo to defaults P...

Страница 31: ...TRAXXAS RALLY 31 NOTES ...

Страница 32: ...1100 Klein Road Plano Texas 75074 1 888 TRAXXAS 100902 KC1317 R00 owner s manual MODEL 7307 ...

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