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  1. #1
    Freaking JK Guru TheDirtman's Avatar
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    Southwest Reno, NV

    JK Freaks Dictionary

    JK Freaks Dictionary
    ABS Sensor: A sensor at each wheel that reads a tone ring on the axle shaft on the rear or in the hub on the front that controls the odometer, speedometer, the abs, and traction control on the JK.

    Adjustable Control Arm: A suspension link that attaches the axle to the frame, The adjustable type will have at least one threaded end that allows for adjustment in length so you can correct pinion angles, adjust caster, or re-center the wheels in the wheel wells. An adjustable control arm will not give you any more suspension travel or flex over the factory links.

    Air Dam:
    The Jk is equipped with a plastic air dam behind/under the bumper. This air dam can interfere with over sized tires and many Jeep owners elect to remove it or trim it. Removing the air damn can result in some extra hood flutter.

    Airing down: Letting out some air in your tires to give you a bigger footprint and increase your crawl ratio. For factory wheels I would not recommend going under 15 psi for fear of popping the tire bead off the tire. With bead lock wheels you can get as low as 2 psi depending on the tire.

    Air Shock: A shock that uses air (nitrogen) instead of oil. Pressure of the air in the shock will dictate the height of lift as coils are not used.

    Refers to suspension and how far the wheels can travel up and down.

    Auto Transmission: Fits between the engine and transfer case that automatically changes gears while driving. The 2007-2011 Jk used a 4 speed automatic transmission. It is a poorly geared match for the 3.8 motor with its gear ratios. The 2012-2014 models use a 5 speed transmission that more closely matches the gear ratios of the 6 speed manual and offers a much better performance and less reliance on axle gearing when installing larger tires.

    DGV 4-Speed Automatic Transmission
    2.840:1 first gear ratio
    1.570:1 second gear ratio
    1.000:1 third gear ratio
    0.690:1 fourth gear ratio
    2.100:1 reverse gear ratio

    W5A580 5-Speed Automatic Transmission
    3.59:1 first gear ratio
    2.19:1 second gear ratio
    1.41:1 third gear ratio
    1.00:1 fourth gear ratio
    0.83:1 fifth gear ratio
    3.16:1 reverse gear ratio

    Axle: Those big things the wheels are connected to under the Jeep. LOL.The JK uses the Dana 30 and 44 Next generation axle and uses a ring and pinion that are thicker then the ones used on the previous models of axles. Some of the very early 2007 models use a Dana 35 axle in the rear. You can check by simply looking at a differential cover chart and match the shape. The Rubicon will have Dana 44 front and rear with electronic selectable lockers. The factory offered three different axle gear ratios: 3.21, 3.73, and 4.10

    Axle Housing:
    The tubes, end forgings and differential case are referred as the axle housing.

    Axle Shafts:
    The shaft that connects the wheels to the differential. Up front you will have the inner shaft and outer shaft that are connected with a U-Joint. The rear shaft includes the flange and lug studs as well as the tone ring, bearing, seal, and retainer clip.

    Axle Sleeve:
    A steel tube that is pressed or welded into the housing of the Dana 30 or Dana 44 Axle to increase strength of the housing.

    B-Pillar: The part of the body that lies between the front and rear door of the JKU.

    Bead lock: A style of wheel that locks at least the outside bead of the tire to the wheel so you can not push the tire off the wheel when wheeling. Some bead lock wheels can air down to as low as 2 psi but most will be in the 6-10 psi range.

    Brake Caliper:
    The component that contains a hydraulic cylinder that squeezes the brake pads against the rotor to cause braking.

    Brake Lines:
    The lines and hoses that transfer the brake fluid from the master cylinder to the calipers. These lines are typically hard tubes for most of the travel from the master cylinder to the frame near the wheels where it continues to the wheels with a flexible brake line or hose.
    Brake Line

    Brake Line Relocation Bracket:
    A simple steel bracket used by some lift companies to drop the hard link down and give the axle more down travel without damaging the brake lines.

    Brake Pads:
    The wear items that cause friction between the caliper and rotor to cause braking. There are 2 pads per wheel.

    Breather Tubes: Tubes on both of your axles, the transmission, and transfer case that allow room for expansion as the oil in them heats up. Some people will raise these up if they like to play in the water but most people can get by leaving them in the stock locations.

    Body Lift:
    A type of lift that uses spacers to raise the body off the frame allowing for more room for articulation and larger tires.

    Bump Steer:
    A condition that arises from improper steering geometry that typically rears is head at 4"+ of lift. A drag link flip with a raised axle side track bar mount should cure bump steer.

    Bump Stops:
    Bump stops are usually foam or rubber bumpers that cushion the bottoming out of the suspension to the frame. The are also used to limit the amount of up travel the suspension has to keep the tires from rubbing the fenders or other parts of the Jeep.Bushing: Rubber isolators inside the ends of control arms and steering linkages to allow for flex in the joints and to provide vibration dampening between the axles and frame.

    Brake Rotor:
    The component that is attached to the wheel hub and is squeezed by the brake pads to cause braking.

    Cage: A structure that is built around the occupants to protect them in case of a roll over.

    Binding: Condition caused by articulating more then a joint or bushing is designed to take.

    Body Mounts:
    Rubber isolators that connect the body to the frame. The JK uses 10 Body mounts.

    The amount of tilt in or out at the top of the front wheels. This is only adjustable by the use of off set ball joints and if your camber is off it would be due to a bent inner C forging.

    The angular displacement from the vertical axis of the suspension of a steered wheel in the Jeep, measured in the longitudinal direction. It is the angle between the pivot line (in a jeep - an imaginary line that runs through the center of the upper ball joint to the center of the lower ball joint) and vertical. When lifting the Jeep this will throw off the caster unless adjustable control arms or relocation brackets are used to put it back into factory specs. So what does this all mean? It is what makes your steering wheel move back to center when you let go of the wheel and helps it to track straight.

    Castle Nut: A nut that has machined notches in the top section that allows the nut to be locked in place with the use of a pin thru the stud.

    Coil-over Shocks:
    A threaded body shock that when used with the appropriate hardware allows you to run coils around the shock.

    The springs that hold the Jeep above the axles. They determine the amount of lift the suspension has and can contribute to the quality of the ride and the weight handling of the Jeep buy using different coil spring rates.

    Coil Un-loading:
    A condition caused buy climbing steeps where the weight of the Jeep is transferred from the front coils to the rear and creating a roll over condition due to the coils pushing the body of the Jeep away from the axles.

    Control Arms:
    The link that attaches the axle to the frame. These links can be know as short arm or long arm and can be adjustable or fixed.

    Corner Guards: Armor that fits the rear body corners to provide protection.

    C forging:
    The C shaped end of the axle housing that holds the ball joints and allows steering. Also referred to as the inner knuckle.

    C Gussets:
    A gusset to reinforce the relatively weak C forgings that the JK axle uses on both the Dana 30 and Dana 44 axles.

    Crawl Ratio:
    A measurement of how well your jeep can climb. It is figured by the formula multiplying the transmission gear ratio X transfer case ratio X the axle ratio. tg x tc x ar=crawl The Rubicon has a CR of 73.1 with 4.10 axle gears and a 6 speed transmission. The Sahara and Sport/X models have a 38.9 with 3.21 axle gears.

    Cross Member: Sections of the frame that cross between the frame rails side to side. The one under the transmission is removable to allow for removing the transmission.

    Tie down point on the Jeep to use for recovery.

    Death Wobble:
    A harmonic oscillation in the steering that is mainly cause by loose components in the steering system. The main cause is a loose track bar bolt but worn bushings and ball joints can also cause the problem. If you think you might have death wobble I doubt you do or if you think you have a little dw. You either have it or not and you will just about shit your pants when it happens the first time. Many people will confuse bump steer or poorly balanced tires with death wobble. Two totally different things. If you have death wobble search planman and death wobble and you will find the write up on how to fix it.

    Also referred to as the pumpkin, the differential is the forged housing that contains the ring and pinion.

    Differential Cover:
    An access cover to the ring and pinion on the axle.

    Drag Link:
    A steering linkage that attaches from the wheel knuckle to the pitman arm.

    Drag Link Flip:
    On suspension lifts of 3.5”+ flipping the axle end joint of the drag link to the top of the knuckle along with raising the axle track bar mount around 3” will improve handling and raise the roll center of the jeep. It is also recommended to raise the axle side track bar mount on the rear axle to match the front for best results.

    Also know as the motor. The 2007-2011 JK uses a 3.8 liter V6 engine that is a cast iron version of the popular motor used int the Chrysler mini vans. The 2012-2013 models use a 3.6 Liter VS know as a pentastar.

    Evap Canister:
    Part of the emissions system (thanks feds) which is basically a hollow plastic box that is mounted to the bottom of the Jeep.

    Fender Liners: The plastic liners inside the fender openings behind the wheel that keep dirt from entering the engine compartment.

    Fender Flares: The plastic parts that stick out from the body above the wheels. Trimming these flares or replacing them with flat flares will allow for more articulation or bigger tires.

    Flange: Adapter like the pinion yoke that mounts to the splined output shaft on the transfer case to allow you to mount the driveshaft.Flex:
    See Articulation.

    Articulating more then your Jeep was designed for resulting in laying it over on its side.

    Freaks: A group of misguided, lost individuals and losers that were removed from jk-forum for some dumb reason or another that found a home on this forum created by Speed2005 a.k.a Johnny.

    Gears: Usually refering to the gear ratio in the axles. The JK has the gear ratios 3.21 ,3.73, and 4.10 offered from the factory. Optional gear sets that are available are 4.56, 4.88, 5.13, and 5.38

    Gear Chart:
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    Hi-Lift Jack: A jack that will lift the Jeep up high enough to do trail repairs such as re-seating a tire bead or changing a tire. Be carful when using the jack off road due to the fact the Jeep could shift easy and fall off of it.

    Hood Flutter: Movement in the hood caused by air entering into the engine compartment thru the grill. This can be made worse by removing the air dam under/behind the front bumper.

    Hood Tie Downs: The rubber and plastic clips at the side of the hood that hold it down. Well duh! what else would you call those things?

    Hydraulic Assist Steering: Also know as ram assist or for some hydro? although water is not involved it should be called Hydra for short but wtf, I know what you are talking about. Hydraulic assist steering adds two ports to the steering box and a hydraulic ram on the tie rod and axle to give some extra push/pull when steering. This is recommended for running 37"+ tires off road aired down. Some systems will use a high output pump as well.

    A forged part of the front axle that allows steering and is connected to the inner C end forging with ball joints or a king pin. These can also be used on the rear axle for 4 wheel steering set ups. The knuckle will have tapered mounts for tie rods and may have a mount for a drag link. A flat top knuckle will have a removable arm that allows for high steer or drag links.

    Limiting straps:
    A strap that connects to the frame and axle to protect the shocks and driveshaft from damage due to over extending the suspension.

    Lock Nut: A nut with a nylon insert or a crimp that grabs the threads on the stud or bolt to prevent it from loosening.

    Lock out Hub:
    A front hub found on aftermarket axles that allows you to lock out the drivetrain on the front axle. Doing so prevents wear on the ring and pinion. It also helps with fuel economy buy not turning the front drive shaft when in 2 wheel drive. Spintech makes an upgrade for the JK although you will have to go to a wheel with a 5x5.5 bolt pattern. This is also known as a manual hub and has to be physically turned on and off at the front hub.

    A type of carrier that contains some type of gear or locking mechanism that will lock both wheels together allowing form maximum power transfer and traction to both wheels. These can be automatic or selectable.

    Transmission: The manual transmission is housed between the engine and transfer case and must be manually shifted to change gears. The JK uses a 6 speed manual transmission.
    DEH 6-Speed Manual Transmission 4.460:1 first gear ratio
    2.610:1 second gear ratio
    1.720:1 third gear ratio
    1.250:1 fourth gear ratio
    1.000:1 fifth gear ratio
    0.840:1 (07-11) 0.797:1 (12-14) sixth gear ratio
    4.060:1 reverse gear

    Master Cylinder:
    The component in the braking system that controls the flow of brake fluid to the brake calipers.
    It also provides fluid for the Hyd Clutch on the 6-speed's.

    Pentastar: 3.6L V6 motor found in the Wrangler starting in 2012.

    The pinion is part of the ring and pinion gear set in the differential. One end is connected to the drive shaft and is commonly referred to as the pinion.

    Pinion Yoke: An adapter that bolts onto the splined pinion shaft that allows you to bolt up your drive shaft.

    Poser: Someone that post up new threads and continuously post photos of their jeep for nor real rhyme or reason. They tend to be concerned with wheels and color schemes where looks trump function. They also tend to brag about their wheeling abilities when they have little to no experience on the subject.

    Pitman Arm:
    The pitman arm is a forged link that connects the drag link to the steering gear box.

    Post Whore: Someone that has to post up in every thread even though they add no relevant information just to get their post count up.

    Pucker Factor: A condition that arises from new and exciting off camper situations when you find yourself rocking on just two wheels.

    Ramp Travel
    Index: A measurement of articulation measured on a special ramp. the JK has a rating of 638 connected and 822 disconnected while the JKU has a rating of 484/644.

    Recovery Gear: The items you use to recover stuck vehicles or to do emergency repairs on the trail. They would include tools, tow straps, tree saver, snatch block, hi-lift jack, on board air, winch, and spare parts. If you run the trails you should start putting together a kit to take along with you incase something happens.

    Ring Gear:
    Part of the gear set in the differential that allows power to be transferred from the driveshaft to the wheels.

    Rocker Panel: The body panel along the sides under the door openings that are easy to damage if off roading where you can drop off an edge or boulder. There are steel armor for them or sliders that will mount below them to offer protection.

    Roll Center:
    Imaginary points that when a line is drawn thru them is the center of gravity of your Jeep. The lower the roll center is the easier it will be to roll over or lean in turns or off camber situations.

    That black box up in the right corner of the page that lets you ask about a topic that may have already been covered on the forum. If looking for lift info or tire sizes you should check here first, it has been covered.

    Sector Shaft: The output shaft on the steering gear box. This has the tendency to bend when used with a drop pitman arms and large tires.

    Sector Shaft Brace: This is a bolt on link that will reinforce the sector shaft.

    Shocks use hydraulic fluid to control the rebound rates of the coils.

    Skid Plate: Armor under the Jeep to prevent damage due to rocks and debris.

    Slave Cylinder:
    a small cylinder containing a piston that operates the brake shoes or pads in hydraulic brakes or the working part in any other hydraulically operated system.

    Snorkel: A relocated cold air intake that moves the opening to a higher point and seals or replaces the factory air box. It is a good idea to have one if you like to play in the water.

    Steeps: A very steep climb or drop off such as a cliff face.

    Steering arm:
    Used with flat top knuckles to mount tie rod or drag links. Can also be used for high steer full hydraulic steering ram mounts.

    Steering Box:
    The gear box that transfers the power from the steering wheel to the drag link to turn the wheels.

    Steering Stabilizer: A shock that is placed on the tie rod and axle to help dampen steering shock and bumps. A steering stabilizer is not required in a solid axle suspension set up and it will not prevent death wobble.

    Stinger: A bar or pipe welded to the front of the bumper that sticks out ahead of the jeep to help prevent an ass over head roll over when coming off steeps.

    Snatch Block:
    A devise that women use to keep guys out of their...Wait thats not it. It is a pulley used with the winch to double the pulling power and pull really heavy or stuck vehicles.

    Sway Bar:
    A rod (he.. he.. he said rod) that connects the frame to the axle to give sideway stability and limit roll in the suspension.

    Sway Bar Disconnect:
    Removing the sway bar link to allow for greater droop in the front suspension. There are air, electronic, and manual disconnect systems that also increase articulation by breaking the link between both sides of the sway bar.

    Sway bar Link:
    A linkage that connects from the axle to the sway bar. The sway bar link will have articulating ends.

    Suck Down Winch: Sounds more fun then it really is.
    A winch attached to the axle that is used to limit the down travel of the suspension to prevent coil unloading during steep climbs or descents.

    Synthetic Line:
    Found on winches the pull cable is replaced with a light weight line made from synthetic rope. This kind of winch line will be quite a bit lighter then steel, not have small sharp barbs to cut you and when they brake they fall to the ground since they do not store kinetic energy like steel cable will. These lines are a wonderful upgrade to the steel lines.

    Third Member:
    I know it sounds dirty but it is just a type of differential that uses a removable ring and pinion section typically used in the Ford 9” housing and on 14 bolt axles. This type of differential makes it very easy to swap gear ratios by simply installing a new third member.

    Tie Rod:
    A steering linkage that connects both sides of the axle at the knuckle and allows for adjustment of toe in.


    Tone Ring:
    A ring with machined timing teeth that is mounted inside the front hubs and on the rear axle shafts that are read by the abs sensor to control the odometer, speedometer, abs, and traction control.

    Track Bar:
    Also know as a pan hard or 5th link in a coil suspension that keeps the axle centered side to side on the vehicle.

    Transfer Case:
    Connected to the transmission the transfer case allows you to transfer power to the axles in either 2 wheel drive or 4 wheel drive. The JK uses two different transfer cases the NV241GII Command-Track with a 2.72:1 Low gear ratio or the NV241 Rock-Trac in the Rubicon model with a 4:1 gear ratio.

    Tree Strap:
    Part of your recovery gear, a wide nylon strap that you use to wrap around a tree you are going to be pulling off of to protect the bark.

    TUB: Rear body section of the Jeep.

    U-Joint: A u-joint is a metal cross with bearings on each end of it that allows for power transfer around a curve. You can find them on the front axle shafts and on after market drive shafts.

    Unit Bearing:
    The hub that is bolted to the outer knuckle that contains the wheel bearings in the front axle.

    The hard round thing made out of steel or aluminum that your tire mounts too. Some people call it a rim. The JK bolt pattern on the wheel is 5x5 and the factory wheels have a back space of 6.25”

    Wheel Adapter: Much like the wheel spacer, it is bolted to the factory hub and provides a different bolt pattern for after market wheels..

    Wheel Stud: The bolt,stud, or lug you mount the wheel too.

    Wheel Spacer: A ring with new wheel studs that is bolted to the hub to push the wheel out from the Jeep to allow for bigger tires.

    Wheeling or Wheeler: A person that goes off road with their Jeep. As in lets go wheeling.

    Not the slutty bar maid (wench). The winch is a recovery tool to pull you or others out of a trouble spot.

    Abbreviated terms:
    AT: All terrain tires
    BFH: Big freakin hammer.
    BS: Back spacing in referring to how far the wheel mounting surface is from the back of the wheel.
    CAI: Cold air intake
    DL: Drag linkII
    FNG: Fucking new guy
    RC: If I recall correctly
    JEEP: Just Empty Every Pocket
    JK: Refers to the Jeep Wrangler model from years 2007-2014
    JKU: Refers to the Jeep Wrangler Unlimited model from years 2007-2014
    JY: Junk yard
    KOH: King of the Hammers
    LCOG: Low center of gravity
    MT: Mud terrain tires
    RHD: Right hand drive
    RTI: Ramp travel index
    Rubi: Rubicon Model
    SB: Sway Bar
    TB: Track Bar or throttle body
    TRE: Tie rod end
    WMS: Wheel mounting surface is the distance between wheel mounting surface on the axle. On the JK it is 65.5”
    WTF: What the Freak!

  2. #2
    Freaking JK Guru TheDirtman's Avatar
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    Southwest Reno, NV
    I was asked to put this list together by Johnny. It is a work in progress and will be added to over time. If you have terms to add post them up and I will add them later.

  3. #3
    Awesome Sauce! Love Monkey's Avatar
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    Livin' on a Coastline
    B Pillar is one that is asked about a lot. This is a good idea, well done and had me giggling
    Also add RHD to the abbreviations.
    Damn...I thought Third Member was...nevermind
    SUPPORTING MEMBER: maybe have the instructions to become one.
    Last edited by Love Monkey; 01-01-2013 at 06:54 PM.
    Quote Originally Posted by D_engel View Post
    Phoenix is lacking some sort of affectionate monkey.
    "Emma Jeep" 2008 Detonator Yellow

  4. #4
    Freak In Nature Murder¹'s Avatar
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    Elko, NV
    Early x's had Dana 35s so you could include that under axles

  5. #5
    Senior JK Freak trialbysneck's Avatar
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    Boston, MA
    man i thought this was going be be tongue in cheek, like

    Sringer,see also Ludski: To quit the forum, only to post again 10 minutes later


    Web Wheeler: See, Heattreater


  6. #6
    Senior JK Freak TheBlackSheep's Avatar
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    Licking County, OH
    Going "Blacksheep" on something. Meaning: Like a total bad ass.

    Alternate meaning: Like a total chode.

  7. #7
    Senior JK Freak BadTrainDriver's Avatar
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    Dublin, Ohio
    Very nice reference for the new people, Dirtman!

  8. #8
    Freaking JK Guru TheDirtman's Avatar
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    Southwest Reno, NV
    Quote Originally Posted by trialbysneck View Post
    man i thought this was going be be tongue in cheek, like

    Sringer,see also Ludski: To quit the forum, only to post again 10 minutes later


    Web Wheeler: See, Heattreater

    I am game. Just keep it light hearted and not mean. Some people on here cant tell the difference or take the criticism.

  9. #9
    Freak In Nature Murder¹'s Avatar
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    Elko, NV
    Don't forget
    Ban: The go too action of a pony tailed man when he feels threatened

  10. #10
    Senior JK Freak Demps64's Avatar
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    north shore MA
    Awesome, thanks dirtman! I was laughing before I even started reading snatch block. Love monkey follows up with third member. Lmao.

    I think deep down sneck just wanted to be in the dictionary...

    Snecking=rolling your JK
    Black 2012 JK 4dr Rubicon
    5 spd auto, 4.10, 2.5" TF coil lift
    285/75/17E Toyo M/T's

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