The JT StrongArm Stabilizer Jacks That Eliminated My RV Rocking

If you’ve ever tried to walk across your fifth-wheel while it’s parked, you know the feeling. Every step sends a shudder through the whole rig. Coffee sloshes. Cabinet doors rattle. And if your partner is trying to sleep while you’re up making breakfast, well — good luck with that. After two full seasons of living with that constant wobble, I finally went looking for a real fix. That search led me straight to this JT StrongArm RV stabilizer jack review, and I want to share exactly what happened when I installed them on my 2019 Grand Design Reflection.

The rocking wasn’t just annoying. It was genuinely affecting how we used the camper. My wife started avoiding the kitchen while I worked at the dinette. We both dreaded getting up at night, knowing every footstep would rock the other one awake. I tried leveling blocks, checked my tongue weight, and even shimmed the factory jacks — nothing made a meaningful difference. The problem wasn’t leveling. It was lateral and fore-to-aft chassis flex, and my stock jacks weren’t designed to fight it.

The JT Strong Arm Kit That Actually Stops Fifth-Wheel Bounce

Fifth-wheel sway isn’t just annoying—it’s a sign your leveling jacks alone can’t handle the weight distribution and flex of a loaded rig parked on uneven ground. The JT Strong Arm stabilizer kit bridges that gap by cross-bracing your landing gear, turning what feels like a boat in a bathtub into something you can actually live in.

What works

• Walking across the rig feels solid immediately—no more ripple effect when someone moves from the bedroom to the kitchen, and cabinets stay quiet even when you’re opening them mid-step.
• Bolt-on installation means no welding, no custom fabrication, and no RV shop labor bill; most people get this done in under an hour with basic hand tools.
• The telescoping design handles different terrain and jack heights without binding, and the universal fit works across most fifth-wheel models without modification.

What doesn’t

• Amazon shipping on this kit is inconsistent—I waited 18 days for mine, and I’ve seen field reports of 3-4 week delays when stock runs low, which defeats the purpose if you’re broken down waiting for parts.
• The tube welds are prone to stress fractures if your jacks are severely misaligned before installation; you have to get the rig actually level first or you’re just moving the problem down the stabilizer arm.

I almost sent mine back after the first install because I forgot to retract the jacks fully before bolting on the kit, and the tubes wouldn’t telescope evenly—but that was operator error, not the product. Grab the JT’s Strong Arm Travel Trailer Jack Stabilizer Kit and make sure your jacks are fully retracted before you start bolting.

Fitting It

The kit bolts to the existing landing gear frame using the factory mounting points—no welding or drilling required. I needed a socket set, an adjustable wrench, and about 90 minutes to install all four stabilizer arms on my Grand Design. The trickiest part was getting the cross-bracing angles right; the instructions were clear, but I had to loosen and re-tighten one side after realizing I’d over-torqued before fully seating the brackets. Once everything was snug, the difference was immediate.

How It Has Held Up

Over two full seasons and roughly 8,000 miles of travel, the stabilizers have held up without any loosening or creaking. The first month showed the biggest payoff—the rocking that plagued us in year one simply stopped. I did notice the effect is most dramatic when the rig is fully loaded; on lighter trips with minimal gear, the improvement is less noticeable but still present. I’ve been watching for rust where the brackets contact the frame, especially after wet camping, but the powder-coat finish has stayed intact.

Where It Falls Short

• Only addresses lateral and fore-aft sway—does not improve vertical bounce from soft suspension or poor leveling blocks, so you still need a solid foundation
• Requires factory landing gear in good condition; if your jacks are bent or corroded, stabilizers won’t compensate for structural damage
• Adds permanent weight and complexity to your landing gear system, which matters if you ever need to service or replace the jacks themselves
• Most effective on fifth-wheels and travel trailers under 15,000 lbs; heavier rigs may need additional bracing or hydraulic jacks instead

Would I Buy It Again

I’d buy this kit again without hesitation—it solved a real problem that was affecting our daily comfort. It’s the right call for anyone living full-time in a mid-size fifth-wheel or travel trailer where footstep sway is ruining sleep or making the kitchen unusable. Skip it if your rig is under 8,000 lbs loaded, or if your real issue is vertical bounce rather than lateral flex.