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General & Safety Rules

General Rules




1.  If any participant(s) are ever found to be conducting themselves in an unprofessional or disorderly way, they will have to leave the event and not be allowed to pull and/or be deemed disqualified.  This is including but not limited to profanity of any kind and threats against any fellow participant or TNT Truck and Tractor Pull official. 

2. If any participant or individual associated with a vehicle participating in any TNT Truck and Tractor Pull event yells, uses foul language, threatens, or gets out of hand with any other participant, individual associated with a vehicle participating at any TNT Truck and Tractor Pull event, or a TNT Truck and Tractor Pull official that individual, participant, and vehicle will be disqualified from current event.  There will be NO exceptions to this rule, as well as no warnings!




1.  All vehicles must have adequate brakes (check specific class rules).




1.  If vehicle has a bed that has been cut out, the bed must be covered neatly.  If vinyl, cover is to be attached with snaps or Velcro.  If sheet metal, cover is to be attached by pop rivets or screws.




1.  Vehicles must have one piece, ¼” Hydroform bell housing on straight shift.  If any modifications are made, modified area must be ground smooth inside and out.


2.  All vehicles using a clutch and flywheel assembly will run a full block saver plate, either ¼” aluminum or 1/8” steel required in all classes.  All flywheels must be steel or aluminum.  No cast stock flywheels allowed.  Each vehicle owner will sign a waiver on the membership card stating they are running a SFI approved flywheel.


3.  Automatics are required to run a one piece SFI SPEC 4.1 six-buckle full length transmission blanket or SFI approved shield in all classes.




1.  Drawbar hitch point must be visible and clear for sled hookup.

2.  Drawbar must be rigid in all directions and solidly mounted on the vehicle frame.

3.  Drawbar must have steel hitching device no more than 1 ½ inch and no less than 7/8 inch thick in all directions and must have an opening of 3 inch by 3 ¾ inch capable of accepting a 3 inch diameter pipe.

4.  No cables or chains used in hitching device.

5.  If clevis used, one clevis only allowed, 6 inches maximum.

6.  Drawbar height must remain set, before, during, and after pull or disqualification will result.  Stop will be run all the way down.  No part of drawbar shall enter cab or driver compartment.  Tech officials are to disqualify illegal hitches without a protest being in place.

Driveline/Driveline Shield


1.  All vehicles are to have a minimum of 5 studs per wheel with lug nuts on each stud.

2.  All planetary drivelines must be fully enclosed by 5/16 inch steel or 3/8 inch aluminum.  All driveline brake components must be enclosed by 5/16 inch steel or 3/8 inch aluminum.  Ends must be enclosed by a minimum of 1/8 inch steel or aluminum.

2WD & 4WD Mandatory


1.  Driveshaft must have 2 360 degree cups on each shaft; 3 inches minimum and at least 1/8 inch thick.

2.  Two piece shafts must have 4 loops.  Loops must be a minimum of ¾ inch wide and 1/8 inch thick not less than 6 inches from or no more than 12 inches away from U-joints.

3.  Maximum horizontal clearance is 2 inches and a maximum vertical clearance is 8 inches both ways.

4.  No cable or chains to be used in drive line shielding.

5.  Intermediate drive shafts require 2 loops of 12 inches or longer and 1 loop if under 12 inches.

6.  Drive shaft loop and U-joint shields required in all classes.



1.  All vehicles must have a ¼ inch steel shield 1 inch wide, 360 degrees around harmonic balancer, no more than 1 inch away from balancer; water pump may be used.  Shields must have strap or straps ¼ inch x 1 inch that will keep harmonic balancer from working forward.  Shield not required on SFI approved balancer.

2.  All vehicles must have adequate catch can on radiator.  Minimum size is 1 quart.  How much water on track is disqualifying will be to the tech officials’ discretion.

3.  All vehicles must have engine side shields minimum of .060 inch thickness, side shield must run full length of block casting and must go from base of head to 2 inches below crankshaft throw, solid frame may serve as part of shield.  KTPA highly recommends side shields above sparkplug.

4.  There will be a 1% tolerance on all engine measurements.

Exhaust System


1.  Headers must run up or down and back depending on the class to prevent excessive dust.



  1. All fuels must pass fuel test according to specs.

  2. Fuel can and will be checked at the discretion of TNT Motorsports officials.


No nitrous oxide or nitro methane.  No oxygen carriers or combustion accelerators.  No diesel (excluded diesel truck class) or propane.  See class rules for individual fuel rules.

Kill Switch


1.  All vehicles must have a working kill switch or will not be allowed to participate at that event.

2.  The kill switch must be located in the rear center of the vehicle.  Maximum of 12 inches off center in either direction.  Maximum 24 inches above the point of hook.

3.  Switches will have attached to them a minimum of 2 inch diameter ring mounted rigid.  To this ring will attach the cable from the sled.

4.  All ignition engines must have a kill switch in working order within easy reach of the driver.  All fuel injected engines must have a fuel shut off valve control within easy reach of the driver.

5.  If kill switch is not mounted in legal position and pulled during the run, no re-pull will be given.

6.  Tie straps will be furnished and used on kill switches to ensure against kill switch being prematurely pulled.  Kill switches will be pulled before each event.  NOTE: Tie straps will be enforced by tech officials using color-coded ties.


Dirt Deflecting Devices


All rear weights must be centerline or above axle except for inside rear tires.  Anything that is down low enough for dirt to strike behind rear tires will be considered a dirt-deflecting device.




1.  All pullers, in every class will ONLY be given one warning for a safety violation.  On the second violation the vehicle will not be allowed to pull at the event.

2.  Fire suits are mandatory in all classes and are required to fit properly and be zipped.  This must be at least a single layer suit.  Head socks and shoes are recommended but not mandatory.

3.  Helmets are required to be worn in all classes.

4.  Fire extinguishers are mandatory in all classes.  Extinguishers must be within easy reach of the driver and must be 2 pound minimum, in proper working order, and with proper working gauge.

5.  No fuel pressure gauges, fuel pumps, or tanks (factory installed only) in drivers compartment.

6.  Vehicle can have factory tints or clear Plexiglass type front, back glass and sides if used.

7.  All vehicles are to be operated in a safe manor, before, during, and after the pull.

8.  All axle bolts must be covered. Shield not to be bolted to hub or axle and must be .060 inch thick. 

9.  All 2WD vehicles must have wheelie bars.  The wheelie bars must be a minimum of 2 inches back from farthest point of tire, must be no more than 10 inches off ground and a 5 inch square pad on bottom.  Measurement is taken from rear most part of tire to front of pad.

10.  All vehicles must be in neutral or park while being hitched or unhitched.  A neutral safety light is required on all vehicles.  An automotive quality white light, a minimum of 2 inches in diameter must be mounted above or below the safety kill switch at the rear of the vehicle.  A light in drivers compartment must be operated off the same system.  Both lights are to be activated by the shift lever so that the lights will be lit only when the vehicle is in neutral.  Drivers are required to have hand in air to signify vehicle is in neutral.

11.  All vehicles must be equipped with a neutral starting switch.  Vehicle will start only in neutral or park.

12.  All vehicles must be equipped with “Dead Man” throttle.

13. Side shields must be securely fastened to the vehicle.

14. All tractors must have tech official approved roll cage.

15.  Safety check sheets will be filled out and signed by a tech official and puller on each vehicle during the current season.  These will be kept on file.




1.  All supercharged motors are required to have SFI approved blower restraints.

2.  All supercharged motors must have blower belt shield.  Shield must be width of blower pulleys and extend to center of crank.

3.  Exposed turbos must be shielded 360 degrees with .060 inch metal.




1.  All tires must have rubber or rubber compound contact between tire and ground surface.

2.  No dual wheels (except for dual wheels in diesel truck class), chains, or studs will be allowed.

3. Any DOT approved two wheel or four wheel drive tire cannot be altered.




1.  All 4WD weights must be safely secured to the vehicle and not extend forward more than 60 inches from the centerline of the front axle (weights included).

Loose ballast, sand bags, weights in cab, etc. are not allowed.

3.  The vehicles original weight will be the class weight or less.  Example: If class weight is 5200#, the weight when crossing the scales will be exactly 5200# or less.  At any time after a vehicle pulls it is sent back to the scales to reweigh there will be an allowance of no more than 20#.  To verify scales, tech officials will send a minimum of three vehicles back across the scales to reweigh.


For a printable version of the General and Safety Rules please click the link below!
Amanda Cox,
Oct 5, 2015, 1:13 PM