Getting asymmetric lift placement right is one of those shop skills that separates a tech who has run a 2-post for six months from one who has run it for six weeks. When we install a Rotary SPO10, a Challenger CL10, or any asymmetric 2-post at a shop in Des Moines, Cedar Rapids, Ames, or anywhere in Iowa, our final task before signing off is a placement walkthrough. This article covers exactly what we teach — where the vehicle sits, why the geometry is what it is, and how to spot a bad placement before you send the lift button up.
Every ALI-certified asymmetric 2-post we stock, priced with Iowa install available and freight quoted upfront to shops elsewhere.
Why asymmetric 2-post geometry exists
The whole reason a shop chooses an asymmetric 2-post is to open the vehicle’s doors while it is on rack. On a symmetric 2-post, the columns sit square to the vehicle and the front doors can hit the columns when they swing open. On an asymmetric setup, the columns rotate roughly 30 degrees relative to the centerline. The vehicle sits slightly rearward of the column midline so its doors clear the posts. That geometry is what makes asymmetric lift placement a specific skill rather than an obvious one.
What most new techs get wrong is assuming they should center the vehicle between the columns the same way they would on a symmetric lift or a scissor. Doing that on an asymmetric puts the arms in the wrong position to reach the factory pinch-weld pads. The front arms end up too short, the rear arms end up straining, and the load balance tilts. Correct placement puts the front axle noticeably forward of the column centerline. Our symmetric vs asymmetric 2-post comparison covers the design difference in depth.
The 30/70 rule for weight distribution
Every asymmetric lift ships with a rated weight distribution: 30% of the vehicle weight forward of the column centerline, 70% behind. That ratio matches most passenger cars and light trucks — engine plus front axle forward, cabin and rear axle behind. When you set asymmetric lift placement correctly, the vehicle’s actual weight distribution should roughly match that 30/70 target. If it does not, you have either the wrong lift for the vehicle or the wrong placement.
The practical way to check this on the shop floor is to look at the vehicle’s balance point relative to the columns after you have lifted a few inches. If the front pads are straining and the rear pads look loaded lightly, you spotted too far forward. If the rears are heavy and the fronts look loose, you are too far back. Adjust by lowering fully, releasing the lift arms, moving the vehicle, and re-engaging. It takes 30 seconds and prevents a much longer conversation later. Read lift weight distribution guide for the numbers behind the rule.
Spotting pinch-weld pad locations before you lift
Every manufacturer publishes pinch-weld or approved-lift-point locations for every vehicle they sell. These are structural reinforcements welded to the underbody at four locations — typically just behind the front wheels and just ahead of the rear wheels, on each rocker panel. Correct asymmetric lift placement means the arm pads land squarely on those four points and nowhere else. Lifting on a fuel tank, a differential housing, or an unreinforced floor pan will damage the vehicle at best and drop it at worst.
On modern vehicles, the pinch-weld locations are increasingly marked with molded plastic tabs, small paint dots, or embossed arrows on the rocker. On older vehicles, you find them by feel — the reinforced pinch-weld has a distinct double-thick edge you can feel with a gloved fingertip. Techs should reference a shop database like AllData or Mitchell 1 for any unfamiliar vehicle before lifting. Getting the wrong pad location wrong once is expensive. Our vehicle lift points guide covers the common trouble spots.
Arm reach and telescoping length verification
Asymmetric 2-post arms are typically three-stage telescoping — a base tube and two extending stages that pull out to reach the pinch-weld point. Different vehicles need different total extensions. A compact car has short wheelbase and narrower track and needs less extension. A crew-cab pickup with a long wheelbase needs full extension on all four arms. Verifying that each arm reaches the pad without maxing out the last stage is part of correct asymmetric lift placement.
If any arm is at full extension with no reserve, the vehicle is too far from that column — reposition. If any arm is fully collapsed and the pad still cannot reach the pinch-weld, the vehicle is too close — reposition the other way. Iowa shops that run a mix of compact cars and full-size pickups sometimes benefit from replacing the arms with longer three-stage variants for extra reach envelope. We stock those replacement arms across Rotary, Challenger, and Forward product lines and can ship anywhere in the country.
Common asymmetric lift placement mistakes we see
The most common mistake we see when we visit shops for service calls is a vehicle spotted too far to one side laterally between the columns. Asymmetric geometry punishes lateral misalignment more than symmetric does because the arms already sit at an angle. A vehicle that is six inches off-center to one side ends up with one arm pair reaching hard and the other pair barely engaged. Techs should visually align the vehicle centerline to the visual midpoint between the columns before spotting front-to-back.
The second common mistake is lifting the vehicle with the tires still touching the ground. Every 2-post lift wants the arm pads seated, the safety-lock check done at four inches of lift, and the tires fully off the ground before proceeding. Some techs rush through and skip the four-inch lock check — that is the moment when a bad pad seat announces itself while there is still time to reset safely. Read 2-post lift safety checklist for the full pre-lift routine.
Placement on longer vehicles and vans
Full-size vans, crew-cab pickups, and older body-on-frame vehicles with long wheelbases are where asymmetric lift placement gets harder. The front-to-back placement window narrows because both axles are pushing against the arm-reach limits. On a full-size van the placement is closer to symmetric — the vehicle is long enough that the 30/70 weight distribution becomes 40/60 or 45/55, and the arms end up more centered under the vehicle than an asymmetric lift is designed for.
For shops running a lot of vans, crew-cab pickups, or body-on-frame commercial vehicles, we often recommend a symmetric 2-post or a heavier-capacity commercial lift. A 12,000 lb or 15,000 lb symmetric 2-post covers the workload better and gives arm reach and clearance that asymmetric geometry does not. If your shop mix in Des Moines, Cedar Rapids, Ames, Waterloo, or Council Bluffs skews toward larger vehicles, tell us that when you quote and we will recommend the right configuration. Our 2-post lift for vans and trucks covers this specifically.
Training new techs on placement in your shop
When we finish an install for an Iowa customer we do a live placement walkthrough with whichever techs will use the lift daily. We spot a vehicle, explain the 30/70 rule, show pad engagement, do the four-inch safety-lock check, and then hand the controls to the tech and watch them do the same. That 20-minute training moment prevents months of small mistakes downstream and is included in every commercial install we do.
If you have existing techs who learned on a scissor or a symmetric 2-post and are new to asymmetric, we can run the same walkthrough as a service call for a modest labor charge. Some dealership shops have us come back annually as part of technician onboarding. Call 800-674-9302 to schedule. We serve Des Moines, Ames, Ankeny, Cedar Rapids, Iowa City, Waterloo, Sioux City, Council Bluffs, Davenport, Dubuque, and the smaller Iowa towns between. Browse the full 2-post lineup at store.autoliftserv.com anytime.
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