Drive On Auto Lift Checklist: Symmetric vs Asymmetric Arms for Your Farm Shop

If you’re a farm shop owner near Ankeny weighing a drive on auto lift against a traditional arm-style two-post, the decision usually comes down to one question you didn’t expect to be asking: symmetric or asymmetric arms, or do you skip arms entirely and drive straight onto a platform? We get this call constantly from rural shop owners who need to lift everything from a half-ton pickup to a loaded stock trailer, and the arm geometry conversation trips up more buyers than weight capacity does. Before you spend a dollar, run through this checklist — it’s the same one we walk customers through before we ever quote a lift.

Item One: Define What You’re Actually Lifting Day to Day

Before comparing arm geometry, write down every vehicle type that comes through your shop in a normal month. Farm shops are notorious for a wildly mixed fleet — a half-ton pickup one day, a grain truck the next, a flatbed trailer with irregular frame rails after that. This matters because a drive on auto lift doesn’t care about frame pickup points at all; the vehicle drives onto a flat runway and the platform itself does the lifting. An arm-style lift, symmetric or asymmetric, depends entirely on finding the right contact points under the frame every single time.

If your daily maintenance work is mostly passenger trucks and cars with predictable frame rails, arms work fine and give you underbody access that a platform can’t match for certain jobs. But if you’re regularly rolling trailers, equipment with modified frames, or anything without clear factory lift points onto the lift, a drive on auto lift removes that guesswork completely. Get honest about your actual fleet mix before you fall in love with either style — this is the single biggest factor that should drive your decision, not price.

Item Two: Understand What Symmetric Arms Actually Do

Symmetric arm lifts split the vehicle’s weight evenly on both sides of the two-post columns, with arms of equal length extending front and back from a centered pivot point. This geometry is simple, well-proven, and tends to be the more affordable configuration because the engineering is straightforward. For farm shop work centered on trucks and standard passenger vehicles, symmetric arms handle the job well and have been the default choice in general repair shops for decades.

The tradeoff is door clearance and technician walk-around space. Because the vehicle sits centered between the posts, doors on both sides open into roughly the same amount of clearance, which can feel tight in a narrower bay. If your farm shop building has generous width, this isn’t a real issue. If you’re working in a converted pole barn bay with posts closer together than you’d like, it’s worth test-fitting your widest daily-driver truck before committing, since symmetric geometry doesn’t give you the extra front clearance that asymmetric arms are specifically designed to create.

Item Three: Understand What Asymmetric Arms Solve

Asymmetric arm lifts offset the vehicle toward the back of the columns, with shorter arms up front and longer arms in back. That geometry is designed specifically to open up extra clearance for the driver’s door and give techs more walk-around room on the front end, which matters a lot if you’re constantly getting in and out of the cab during service or running diagnostic equipment through the door. For a farm shop where trucks get driven on and off the lift dozens of times a week, that door clearance adds up in saved time and fewer banged knuckles.

The offset also shifts weight distribution slightly, so asymmetric lifts are commonly rated for the load to sit more toward the rear columns. This works well for trucks and SUVs with more weight naturally over the rear axle, but it’s something to confirm against your actual vehicle mix rather than assume. If your shop leans heavily toward flatbeds or equipment with front-heavy loads, that’s a conversation to have with us directly before ordering, since the wrong arm offset for your typical load can create awkward balance during raising and lowering.

Item Four: Decide If a Drive On Platform Skips the Whole Debate

Here’s the honest answer for a lot of farm shops: if you’re going back and forth between symmetric and asymmetric because nothing about your fleet is predictable, a drive on auto lift sidesteps the entire question. There are no arms to position, no frame pickup points to hunt for, and no guessing whether this week’s trailer or flatbed has clearance for arms to swing under it. You drive on, lock the platform, and raise it — the same process every time regardless of what rolled in.

The tradeoff is underbody access. Arm-style lifts leave the underside of the vehicle completely open for exhaust work, transmission service, and suspension jobs where a tech needs to work from below without obstruction. A drive on auto lift’s platform sits under the vehicle by design, which means certain jobs need a mid-rise or in-ground alternative instead. For general daily maintenance — oil changes, brake work, tire service, undercarriage inspection from the sides — a platform lift covers most of what a farm shop actually does day to day, but it’s worth being clear-eyed about what it can’t do before you buy.

Item Five: Check Your Building Before You Check a Catalog

Ceiling height, floor thickness, and bay width all constrain your options before arm geometry ever enters the conversation, and this is where we see the most farm shop buyers get surprised after the fact. A converted pole barn near Ankeny often has adequate width but lower ceiling clearance than an owner expects once a two-post lift’s full extended height is factored in. Concrete floor thickness and cure time also matter — anchoring a lift into undersized or too-new concrete is a safety problem no arm configuration or platform style can fix.

We always recommend a site visit or at minimum a detailed measurement conversation before finalizing a purchase, because a lift that’s perfect on paper can be the wrong choice for a specific building. This is true whether you land on symmetric arms, asymmetric arms, or a drive on auto lift — the equipment has to fit the building it’s going into, not the other way around. Skipping this step is the most common regret we hear about from farm shop owners who bought based on a spec sheet alone.

Item Six: Price the Whole Job, Not Just the Lift

The sticker price on any lift is only part of the real cost. Installation, electrical work if you’re not already set up for the right voltage, concrete inspection or reinforcement if needed, and any bay modifications for clearance all factor into what a farm shop actually spends getting a lift operational. Asymmetric and symmetric arm lifts are generally similar in installation complexity, while a drive on auto lift’s platform and ramp footprint can require a bit more floor space planning depending on your bay layout.

Get a full installed quote, not just an equipment price, before comparing options against your budget. We walk every farm shop customer through this because the cheapest lift on a spec sheet sometimes turns into the most expensive project once electrical and concrete work get added in. Knowing the true total cost upfront lets you compare symmetric, asymmetric, and drive-on options apples to apples instead of getting surprised at install time.

Item Seven: Ask About Load Locks, Certification, and Support After the Sale

Whatever style you land on, confirm the lift has mechanical safety locks that engage at multiple height increments, not just a single top-stop. For farm shop work where the same lift might raise a light pickup one hour and a loaded trailer the next, having several lock positions gives techs flexibility to work at a comfortable height without relying on hydraulics alone to hold the load. This applies equally to symmetric arms, asymmetric arms, and drive on auto lift platforms — the lock mechanism is non-negotiable regardless of style.

Also ask what support looks like after installation. Farm shops are often far enough from a dealer that a quick service call isn’t realistic, so parts availability and phone support matter more than they would in a city shop. We stock parts for every major brand we sell precisely because rural customers can’t afford to wait weeks for a hydraulic seal or a lock pin. Before you sign anything, make sure whoever you’re buying from will still answer the phone a year after the sale — that’s the real test of whether you made the right call.