We got a call last spring from an RV and trailer service shop in eastern Nebraska who needed a car lift drive on setup for wheel bearing rebuilds, brake work, and axle service on medium-duty trailers and passenger vehicles they picked up as side work. The owner had watched three lift YouTube videos and read a dozen forum threads, but he wanted a straight answer about slab thickness, rebar spacing, and what the first year of ownership actually looks like. We built the quote, shipped the lift, and coordinated the install. Twelve months later, we walked the shop with him to look at ramps, cables, and hydraulic hoses. Here is the whole story from that project.
Every drive-on model on our site has been installed by our own crew somewhere in the Midwest. Call 800-674-9302 if you want us to size one against your slab and your ceiling before you order.
Why a Drive-On Configuration Made Sense for His Shop
The shop ran a hybrid operation: RV repair up front, trailer axles and light truck work in the back bay, and passenger vehicles as walk-in overflow. A two-post would have forced techs to reposition arms every time the workload shifted from a Class C motorhome tow chassis to a Silverado. A drive-on setup lets a tech pull straight up the ramps, drop the wheel chocks, and get to work in under ninety seconds. That mattered when he was quoting bay hours to fleet accounts.
A car lift drive on rig also let him store a trailer overhead in the off-season without breaking down the wheel setup. He runs the shop with two techs plus himself, and the drive-on layout keeps whichever tech is closest to the door in production instead of hunting for lift arms. Floor space was another factor: his 40×60 building has a mezzanine on the east wall, so clearance was tight for a symmetric two-post. Drive-on columns line up cleanly along a single side, and he can walk around the vehicle without ducking under swing arms. He told us later that the biggest surprise was how many RV customers asked about the lift by name after a shop tour.
Slab Thickness and Rebar Spacing: What the Manual Actually Requires
Every drive-on install we do starts with the same question: what does the concrete look like? For a 14,000 lb rated drive-on, the manufacturer typically calls for a minimum 4 inches of 3,000 PSI concrete with #4 rebar on 18-inch centers. His shop had six-inch slab at the column line and four-inch mid-bay, which was borderline. We had him core-drill two spots to confirm, then agreed to place the columns on the six-inch pours. That real conversation saved him a full slab rip-out.
Heavier drive-on lifts require six-inch minimum, and if you skip the check you are gambling with the anchor pullout rating. Rebar spacing matters because the column anchors transfer lateral load, not just vertical. If the rebar is on 24-inch centers, or missing entirely, the anchors can spall the concrete under torque. Any buyer planning a car lift drive on install should also verify slab flatness within a quarter inch across the runway footprint. On his floor we shimmed the passenger-side column plate 1/16 inch, which is normal. What you do not want is more than 3/8 inch out — that is a slab problem, not a lift problem. We ended up recommending an epoxy-injection anchor kit instead of standard wedge anchors because his pour had some hairline surface cracking.
Install Day: What We Did and What He Did
Our crew showed up at 7am with the lift on a flatbed. He had the bay cleared, the electrical drop stubbed at the column head, and the slab swept. That prep matters more than most people realize — an install day that starts with moving parts inventory takes an extra four hours. We uncrated the runways, set the columns plumb, dropped the crossbeams, ran the hydraulic hose, and pulled the cables. The first-time raise is always the tell: if the runways rise level within a quarter inch across the length, you did the anchor layout right. His did.
The owner and one of his techs shadowed the install so they could handle their own annual inspection later. We walked them through the cable adjustment nuts, the safety ladder engagement, and the ratchet reset. That transfer of knowledge is worth as much as the install itself. He asked about running it on 110V; we told him no, this class of drive-on runs on single-phase 220V and the motor pulls about 20 amps at start. He already had a 30-amp circuit stubbed, so we were good. We finished the install by 3pm, ran three cycles of empty-load raise-and-lower, then ran his own service truck up as a load test. Everything checked.
The First Wheel Bearing Job on the New Lift
Two weeks after install, he had a customer bring in a triple-axle enclosed trailer that needed all six hubs pulled, cleaned, and repacked. On a two-post that job is a nightmare because you have to jack up each axle individually with a bottle jack and the trailer wants to walk. On the drive-on, he strapped the trailer to the runways, raised it to waist height, and used the rolling jacks under each axle to lift one wheel set at a time. Total job time went from a projected six hours to a little over three.
That is the pattern with a car lift drive on: the setup time on any wheels-off job shrinks because you never have to fight the vehicle’s balance. He ran the same play on a customer’s Class B motorhome the following week — front bearings, rear brakes, driveline lube. His tech reported that the biggest win was ergonomic. Working at chest height instead of on a creeper cut fatigue on a job that used to end the day. He also mentioned that customers watching from the office window came away impressed, which sounds silly but translates into repeat bookings. Wheel bearing service on trailers is not a high-margin job by itself, but when you can turn one in three hours instead of six, the math changes.
Rolling Jacks and Approach Ramps for Trailer Axles
He bought two rolling jacks with the lift, and we would recommend the same to anyone doing trailer work. The rolling jack straddles the runways and gives you a second lift stage — you raise the whole vehicle first, then pop one axle up independently for wheel-off work. Without them, you are back to bottle jacks and jack stands, which defeats half the value of a drive-on. The jacks he chose are rated at 7,000 lb per pair, which matches his lift capacity comfortably.
Approach ramps were the other spec we spent time on. Standard drive-on ramps are steep — about 12 degrees — which is fine for a passenger car but scrapes the front air dam on some low sports cars and on trailer tongue jacks. He does not do low sports cars, so he took the standard ramps. If your car lift drive on install has to accommodate anything with less than five inches of ground clearance, we sell extended low-profile ramps that drop the approach angle to about seven degrees. Those ramps add about 18 inches to the overall footprint, so measure before you order. He also added drip trays under both runways because trailer wheel bearings tend to purge grease under load, and keeping the shop floor clean matters when customers walk through.
Twelve-Month Service Check: Cables, Hoses, and Column Wear
We came back at the twelve-month mark for the annual check. The cables looked good — no visible fraying, no bird-caging at the sheaves, and the equalization was within a half inch across the four corners. That is normal wear at one year of moderate commercial use. We adjusted two of the cable nuts by about a quarter turn each to bring the corners back into flat. The hydraulic hoses were dry and the fittings were tight. No pinhole leaks, no seepage at the column base. The safety ladder ratchets engaged crisply on the drop cycle, which is the single most important safety check on any drive-on.
Column wear was the mild surprise. On the driver-side column we saw a shiny wear line about waist-high where a rolling jack handle had been repeatedly bumping the paint. Not structural, but worth touching up with matched paint to keep rust from starting in a Nebraska winter shop. Cable inspection intervals on this class of lift are typically every 90 days for visual, annual for full measurement. He had been doing the visuals monthly, which is above spec and exactly what we want to see from a commercial operator. His hoses will probably need swap-out around year seven based on the manufacturer’s recommendation, and we told him to plan the budget line for it now.
What He Would Buy Again — and What He Would Change
At the debrief, we asked him the two questions we ask every customer at the one-year mark: what would you buy again, and what would you change? He said he would buy the same lift again without hesitation and would spring for the rolling jacks on day one instead of six months in. The one change he would make: he wished he had wired a second 220V drop at the opposite column base so he could relocate the power unit if he ever reshuffled the bay layout. That is a $200 electrician add during original construction that becomes a $600 retrofit later.
He also would have painted the floor before install. Once the columns are anchored, painting under them is essentially impossible without lifting the lift. If you are planning a car lift drive on install, pour the slab, cure it, seal or paint it, then install. Those three lessons — rolling jacks up front, a second power drop, and floor prep before columns — are the ones we hear most often from year-one owners looking back. His shop is now running the lift about five days a week with no downtime, and he has recommended us to two other RV shops in the region who were shopping around and comparing brands.
Related reading: our 4-post alignment lift buyer’s guide, our writeup on rolling jacks for 4-post lifts, and the slab requirements article we wrote after this install.
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