Stabilizing a travel trailer at the campsite
Wheel chocks, leveling blocks, scissor jacks, and X-chocks: the order to use them in, plus what stops a trailer from rocking when you walk inside.
Level the trailer first, then chock the wheels, then drop the stabilizer jacks. Stabilizer jacks are not levelers, and treating them as one bends jacks and damages frames. The full process takes 10 to 15 minutes and stops most of the rocking. If you can still feel it inside, add X-chocks between the tires.
Why a travel trailer rocks
A travel trailer rolls on rubber tires with leaf or torsion-spring suspension. Both are designed to absorb road vibration. They also let the trailer bob like a small boat when you walk around inside.
Scissor jacks at the corners stop the bobbing by pinning the trailer to the ground at four points. They aren’t designed to lift weight, just to remove the slack in the suspension. Without the jacks, every footstep transfers into the suspension.
What you need
- Wheel chocks: rubber or plastic wedges placed against the tires
- Leveling blocks: ramp-style (Andersen Camper Leveler) or stackable blocks (Lynx Levelers)
- Stabilizer jacks: built into the trailer at the four corners
- Jack pads or blocks: square pads under the jacks to spread the load
- X-chocks (optional): a clamp that goes between dual-axle tires to lock them together
- Bubble level or smartphone level app to check level
That’s it. No exotic tools required.
The order to do it in
Step 1: Level side to side
Pull into the site. Eyeball the ground or use a bubble level mounted on the trailer. If one side is low, drive the trailer onto leveling blocks on that side. The Andersen-style ramp levelers are quicker than stacking: pull on, check level, chock to hold position.
Most setups need 1 to 4 inches of lift on one side. Anything more and you should pick a flatter spot.
Step 2: Chock the wheels
Once you’re level side to side, place wheel chocks against the tires on the downhill side of the trailer. Both tires on the downhill side, both directions. Even on flat ground, chock both tires.
Step 3: Level front to back
Unhitch from the truck. Use the tongue jack to raise or lower the front of the trailer until the bubble level reads level front to back.
If the truck is still hitched while you’re doing the side-to-side leveling, the truck’s suspension and the trailer’s coupler interfere with measurements. Always unhitch before final leveling.
Step 4: Drop the stabilizer jacks
Place a jack pad or 2x6 block under each corner of the trailer. Lower each scissor jack until it’s firmly on the pad. You don’t want them lifting the trailer, just touching down.
A rule that comes up often: scissor jacks should be more than halfway extended (the arms look like a tall diamond, not a flat square) before they touch the ground. Less than halfway extended and they’re at their weakest geometry.
Tighten in this order: front passenger, rear driver, front driver, rear passenger. Crossing diagonally distributes the load evenly.
Step 5: Test for rock
Walk inside. Bounce gently on the floor. If it still moves noticeably, the jacks aren’t tight enough, or the trailer needs X-chocks.
Adding X-chocks
X-chocks (Camco XLT, Lippert) wedge between the two tires on each side of a dual-axle trailer. Cranking them apart locks the tires together, stops the trailer from rolling forward or back even slightly.
Useful when:
- The site has loose gravel
- The stabilizers can’t fully take up slack
- The trailer is heavy enough that walking around moves it
Don’t use X-chocks on a single-axle trailer. There’s nothing for them to brace against.
Slide-outs come after leveling
Slide-outs need the trailer level before they extend. Mechanism wear from extending an unlevel slide adds up fast. Level first, slide out second.
Once the slides are out, recheck the jacks. Weight shifted to one side as the slide moved, so the jacks on that side may have loosened. Re-tighten.
What happens if you don’t bother
| Problem | Why level matters |
|---|---|
| Refrigerator damage | Absorption fridges (most travel trailer fridges) need to be level within 3 degrees to circulate ammonia coolant. Off-level destroys them |
| Inaccurate tank readings | Tank sensors only read accurately on level. Off-level shows wrong fill levels |
| Slide-out wear | Off-level slides bind the rails and stress the motors |
| Door swings shut | Doors swing closed on uneven sites, latches wear, hinges twist |
| You feel seasick | Self-explanatory |
The fridge is the expensive one. A new RV absorption fridge runs $1,200 to $2,500, and most of them die because someone parked off-level for a week.
Extra stabilization options
Beyond the basics:
- Kingpin stabilizer (fifth wheels): a tripod under the kingpin keeps the front of a fifth wheel from rocking
- Slide-out support jacks: extra scissor jacks placed under slide-out frames
- Front bumper jacks: aftermarket scissor jacks added to the trailer if the front rocks more than the rear
If the trailer still rocks side to side after everything else, the suspension itself may be loose. Worn shackle bolts, worn shocks, or torsion axles past their service life all show up as excessive rocking.
Things people get wrong
- Using stabilizer jacks to level: bends jack arms, cracks frames where the jacks bolt on. Use leveling blocks under the wheels for vertical adjustment.
- Forgetting jack pads on soft ground: the jacks sink, the trailer drops, you wake up at 3am to a thump. Always pad under the jacks on grass, sand, or gravel.
- Extending slides before leveling: damages the slide mechanism over time.
- Skipping wheel chocks “because the jacks are down”: jacks don’t hold the trailer, chocks do.
Time it takes
After you’ve done it a few times, the full setup is 10 to 15 minutes. The first few times will be longer. Most of the time is finding level (a level spot or building up the low side).
A pre-set “leveling system” routine helps: drive in, eyeball, drop the leveler ramps on the low side, pull on, chock, unhitch, tongue jack, four scissor jacks, slides out. Same order every time, no thinking required after a season or two.