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2 • SLAYER PRO 4X4

INTRODUCTION

Thank you for purchasing a Traxxas Slayer Pro 4x4. The Slayer Pro 
4x4 is designed to simulate the speed and excitement of full-scale 
Pro 4X4 short-course race trucks. 4WD Short Course Racing brings 
together the most horsepower and the most suspension travel 
for incredible side-by-side, fender-banging racing action. Engines 
scream at the redline as dirt and rocks roost from all four tires. Only 
the fastest, most powerful trucks dare to compete! The Traxxas 
Slayer Pro 4x4 brings the sound, smell, and excitement of  Pro 4X4 
short-course racing right into your own backyard. 

The TRX 3.3 Racing Engine is the most powerful engine of its size 
ever available in a Ready-To-Run truck. Advanced engineering and 
design, along with thousands of hours of testing, puts the TRX 3.3 
in a class by itself. Each part of the TRX 3.3 - from the air filter on the 
slide carburetor, to the tip on the dyno-tuned exhaust system - has 
been carefully engineered to provide maximum power over the 
broadest rpm range.

We know you’re excited about getting your new Slayer Pro 4x4 
on the road, but it’s very important that you take some time to 
read through the Owner’s Manual. This manual contains all the 
necessary set-up, break-in, tuning, and operating procedures that 
allow you to unlock the incredible performance and adjustment 
potential that Traxxas engineers designed into Slayer Pro 4x4. 

Even if you are an experienced R/C enthusiast, it’s important 
to read and follow the procedures in this manual. Slayer Pro 
4x4 contains new technologies in the engine, suspension, and 
transmission operation that you may not be familiar with. Pay 
particular attention to the fuel and break-in requirements for 
the engine. 

The advanced design of the TRX 3.3 Racing Engine 

has a special break-in procedure that has been developed and 
proven to produce the best-performing engine possible. Using 
traditional or old-fashioned procedures could reduce engine 
performance and longevity.

Slayer Pro 4x4 is made to be a complete package that starts 
with the highest level of engineering; a professionally produced 
DVD to acquaint you with the starting, racing, and maintenance 
procedures; and is equipped stock with the most powerful Ready-
To-Race

®

 engine available. We want you to feel confident that you 

own the best-performing truck in the market and that it is backed 
by a team of professionals who aim to provide the highest level of 
factory support possible. Slayer Pro 4x4 is about experiencing total 
performance and satisfaction, not just with your truck, but also with 
the company that stands behind it. 

Thank you again for going with Traxxas. We work hard every day to 
assure you the highest level of customer satisfaction possible. We 
truly want you to enjoy your new Slayer Pro 4x4! 

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BEFORE YOU PROCEED

SAFETY PRECAUTIONS

TOOLS, SUPPLIES, AND 
REQUIRED EQUIPMENT

ANATOMY OF THE 
SLAYER PRO 4X4

QUICK START:  
GETTING UP TO SPEED

TRAXXAS TQ 
RADIO SYSTEM

THE TRX 3.3 
RACING ENGINE

DRIVING YOUR  
SLAYER PRO 4X4

BASIC TUNING 
ADJUSTMENTS

MAINTAINING AND 
STORING YOUR 
SLAYER PRO 4X4

ADVANCED TUNING 
ADJUSTMENTS

Traxxas Support

Traxxas support is with you every step of the 
way. Refer to the next page to find out how to 
contact us and what your support options are.

Quick Start

This manual is designed with a Quick 
Start path that outlines the necessary 
procedures to get your model up 
and running in the shortest time possible. If you are an 
experienced R/C enthusiast you will find it helpful and fast. 
Be sure and read through the rest of the manual to learn 
about important safety, maintenance, and adjustment 
procedures. Turn to page 7 to begin.  

Summary of Contents for Slayer Pro 4x4 59074

Page 1: ...owner s manual MODEL 59074...

Page 2: ...design of the TRX 3 3 Racing Engine has a special break in procedure that has been developed and proven to produce the best performing engine possible Using traditional or old fashioned procedures cou...

Page 3: ...h 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 s...

Page 4: ...xposure to the engine exhaust can be harmful Avoid breathing the engine exhaust Always run your Slayer outdoors in a well ventilated area Never run the engine indoors Do not operate your Slayer at nig...

Page 5: ...ies on page 10 Supplied Tools and Equipment Required Tools and Equipment sold separately Glow plug wrench Extra glow plug 1 5mm L wrench 2 0mm T wrench 2 5mm T wrench Shock wrench Suspension multi too...

Page 6: ...e Fuel Line EZ Start Motor Bulkhead under chassis Body Mount Post Chassis Driveshaft Half Shaft On Off Switch Throttle Linkage to Throttle Brake Servo below filter Antenna Mount Access Plug for two sp...

Page 7: ...rocedure for your TRX 3 3 5 Decal and Install the body See page 12 14 Break in your engine See page 23 You will need to use the body during break in so it s best to apply any additional decals before...

Page 8: ...tion that the servos seek when the transmitter controls are at the neutral setting NiCad Abbreviation for nickel cadmium The original rechargeable hobby pack NiCad batteries have very high current han...

Page 9: ...nd channel two operates the throttle The receiver inside the model has three output channels Your model is equipped with two servos and a receiver Slayer Pro 4x4 Wiring Diagram Antenna On Off Switch R...

Page 10: ...rol of your model it is important to stop at the first sign of weak receiver batteries to avoid losing control Visible warning signals include sluggish steering response and shortened radio range Inst...

Page 11: ...ur transmitter was not programmed properly at the factory Do not reverse the throttle or steering channels unless necessary Steering reversing procedure 1 Press and hold the SET button on the transmit...

Page 12: ...ntil you reach the farthest distance you plan to operate the model 4 Operate the controls on the transmitter once again to be sure that the model responds correctly 5 Do not attempt to operate the mod...

Page 13: ...wire against the chassis Do not bend or kink the antenna wire Do not shorten the antenna tube See the side bar for more information Fail Safe Your Traxxas radio system is equipped with a built in fail...

Page 14: ...of premature engine wear and failure is lack of care and maintenance BREAK IN The TRX 3 3 Racing Engine is manufactured to exacting tolerances and requires a specially designed break in procedure to a...

Page 15: ...Carburetor Air Intake Fuel Intake High Speed Needle Idle Speed Screw Clutch Bell Crankcase Two Stage Air Filter Glow Plug EZ Start Plug Positive Wire Negative Wire Fuel Line Fuel Tank Tuned Pipe Heade...

Page 16: ...e s body that contains all of the running mechanical components Crankshaft The main shaft of the engine that holds the reciprocating assembly Cooling fins The cooling fins are milled into the cylinder...

Page 17: ...s the first level of air filtration for the engine The majority of dirt and debris will be stopped by this filter Clean re oil and replace this filter after every hour of run time Always use both the...

Page 18: ...other factors determine how much nitro can be efficiently used in the engine The TRX 3 3 Racing Engine responds exceptionally well to a maximum of 33 nitro returning cooler temps more power and a smoo...

Page 19: ...t Do not pull straight up 2 Remove the pre filter element 3 Clean the pre filter element by thoroughly washing the foam element in hot soapy water dishwashing detergent works well Repeat twice 4 Thoro...

Page 20: ...vailable air atomization THE FUEL MIXTURE NEEDLES The amount of fuel metered and atomized by the carburetor is controlled by the two mixture needles the high speed needle and the low speed needle The...

Page 21: ...unit and an on board motorized starter Power for the EZ Start system comes from a 7 2 volt rechargeable battery pack installed in the hand held control unit The engine glow plug is heated automaticall...

Page 22: ...charged may not deliver enough power to crank the engine over at the appropriate rpm to keep the piston from sticking at top dead center TDC A new engine will typically have a tight fit between the pi...

Page 23: ...r after break in Follow the instructions exactly for each of the first 5 tanks of fuel Starting Your TRX 3 3 Racing Engine for the First Time Before you start your TRX 3 3 Racing Engine for the first...

Page 24: ...3 When the fuel tank is nearly empty shut off the engine and refuel From here on you do not need to let the engine cool between tanks Tank 4 1 Driving procedure Gently pull the throttle trigger to fu...

Page 25: ...ds then it is likely that it is over 220 F and needs to cool down If the water takes a long time or does not evaporate at all then the engine is too cool We do not recommend that you operate your engi...

Page 26: ...counterclockwise and retest This setting will extend engine component life Low Speed Fuel Mixture Adjustment The low speed mixture is always set after the high speed needle is correctly adjusted The l...

Page 27: ...nfluence on engine temperature is air temperature Expect the engine temperature to vary almost in direct proportion to air temperature Assuming you tuned the engine for the same maximum performance ea...

Page 28: ...hing with your Slayer Pro 4x4 The engine is cooled by airflow created by speed Towing creates a high load on the engine and at the same time limits cooling of the engine due to low vehicle speed If yo...

Page 29: ...x4 is lightened significantly for racing applications softer springs will be necessary to allow the suspension to sag properly Heavier configurations will require stiffer springs The suspension sag an...

Page 30: ...Empty the used shock oil from the shock body 4 Fill the shock with new silicone shock oil up to the top of the shock body 5 Slowly move the piston up and down always keeping it submerged in oil to rel...

Page 31: ...1 Limiting the engine s torque output to the wheels to prevent wheelspin on low traction surfaces and help to prevent damage to the gears in the transmission during on throttle landings 2 Protecting t...

Page 32: ...lap after each adjustment On a small race track with many tight turns try setting the shift point later so that the truck only shifts into second gear on the main straightaway This will prevent an un...

Page 33: ...oulder bolts that are used to secure the brake pads to the transmission housing may need to be adjusted periodically as the brake material wears down They should be tightened so a 0 50mm 020 gap exist...

Page 34: ...ld be replaced when the piston and sleeve are replaced Also replace the piston wrist pin and G clip whenever the connecting rod is replaced As with other internal engine components connecting rod life...

Page 35: ...reinstall the glow plug and gasket 6 Reconnect the blue glow plug wire to the glow plug 7 Reconnect the EZ Start controller 8 Do not prime the engine Pull the throttle to 1 2 throttle and push the EZ...

Page 36: ...ration Refer to the chart on page 37 for proper settings Stock the Slayer Pro 4x4 is setup to increase rear toe in during acceleration Note that rear toe out is not used Rockers Progressive Rate Suspe...

Page 37: ...d look up your suspension combination caster angle and roll center position to find the correct position for the front outer toe links The same is required for the rear control links Adjustment is ach...

Page 38: ...unloaded wheels on the inside of the turn have the least traction and tend to spin up to extremely high rpms Higher viscosity thicker oil causes the differential to act like a limited slip differenti...

Page 39: ...spension multi tool B 7 Slide the bump stop onto the shaft 8 Grip the shaft close to the threads with needle nose pliers or side cutters and thread the rod end onto the shock shaft until the rod end b...

Page 40: ...121204 KC1754 R01 1100 Klein Road Plano Texas 75074 1 888 TRAXXAS MODEL 59074 owner s manual...

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