Right-Hand Thread vs. Left-Hand Thread: What’s the Difference?
A right hand RH thread tightens clockwise and loosens counterclockwise this is the standard used on the vast majority of bolts nuts and screws A left hand LH thread is the mirror image it tightens counterclockwise and loosens clockwise The two aren’t interchangeable a right hand nut will not thread onto a…
What Is Left-Hand Thread?
Left hand thread also called reverse thread is a screw thread that tightens counterclockwise and loosens clockwise the opposite of the standard right hand thread used on most fasteners It’s not a defect or a mistake it’s a deliberate design choice used in specific situations where a normal thread would work itself…
What Does Right-Hand Thread Mean?
Right hand thread RH means a screw thread that tightens when turned clockwise and loosens when turned counterclockwise the classic righty tighty lefty loosey It’s the standard direction used on the vast majority of everyday fasteners bottle caps jar lids wood screws machine bolts wheel nuts If a fastener you’re looking at…
Where to Buy Left-Hand Thread Nuts
Left hand thread nuts aren’t stocked at a typical hardware store but they’re not hard to find once you know where to look the trick is matching diameter thread pitch and handedness exactly before you buy since a left hand nut that’s off by even one of those three won’t work at…
What Is a Jam Nut on a Tie Rod End, Which Way Do You Turn It, and What Size Are They?
A jam nut on a tie rod end is a thin locking nut threaded onto the adjustable section of the rod tightened against the tie rod end or its adjuster sleeve to lock a toe alignment setting in place once it’s been dialed in Its only job is to keep vibration from…
Heim Joint vs. Johnny Joint: What’s the Real Difference, and Are Johnny Joints Actually Strong?
A Heim joint rod end carries its ball directly against a metal or PTFE lined race with no cushioning it’s precise but transmits every bit of road shock straight through A Johnny Joint carries the same idea of ball and socket articulation but seats the ball in replaceable polyurethane bushings inside a…
What Is a Hitch Pin?
A hitch pin is a metal pin that passes through aligned holes in a receiver hitch and the accessory inserted into it a ball mount cargo carrier shank or bike rack holding the two together A retaining clip cotter pin or lock keeps the pin from backing out under vibration and road…
How to Set Differential Pinion Angle (4-Link and Solid-Axle Off-Road Setups)
Setting pinion angle means adjusting your rear axle housing so the pinion yoke’s angle runs parallel equal and opposite to your transmission or transfer case output shaft angle once the suspension is loaded at ride height Get it wrong and the U joints on either end of the driveshaft stop canceling each…
3-Link vs. 4-Link Suspension: What’s Actually Different
A 3 link suspension locates a solid axle with three control arms two lower links plus a single upper link usually paired with a Panhard bar to keep the axle centered side to side A 4 link uses four control arms two lower two upper and depending on how the upper links…
What Is a 4-Link Suspension?
A 4 link suspension is a setup that uses four independent control arms two upper two lower to connect a solid axle to a vehicle’s frame The links handle locating the axle keeping it positioned front to back and controlling how much it rotates under power while a separate coil spring coilover…
How to Measure Pinion Angle: Tools, Steps, and Common Mistakes
Measuring pinion angle means taking three angle readings at the transmission or transfer case output shaft along the driveshaft and at the rear pinion yoke with the suspension loaded at normal ride height then calculating the difference between them to get the U joint’s working angle This is the diagnostic step what…
What Is Axle Wrap? Causes, Symptoms, and Why 4-Link Suspensions Resist It
Axle wrap is what happens when a rear axle housing tries to rotate under engine torque instead of staying put the housing twists opposite the direction the wheels are turning and whatever’s holding it usually a leaf spring has to absorb that twist On a leaf spring vehicle the spring pack bends…