Greg Smith GS-RBJ6 Review: Premium Rolling Jack with Unmatched Build Quality

Greg Smith Equipment is an Indiana lift distributor that sells direct, and the GS-RBJ6 is its house-branded rolling jack: a 44 in long scissor unit on heavy polyurethane casters with sealed bearings, rated at 6,000 lb, that slides under one end of a vehicle at 3.5 in of ground clearance, raises it to 30 in on shop air, and sets on mechanical locks. Each unit weighs 310 lb. The warranty is 5 years on structure and 2 years on components, which is the longest component cover on any rolling jack in this group.

The tool comes from four-post lift bays, where a bridge jack rides the runways to raise one axle for brake and suspension work. On casters it does the same job on a garage floor, and it does it without per-vehicle frame positioning, without a power cord, and without the car going anywhere. The jack goes to the car.

At around $2,499 the GS-RBJ6 is priced $100 above the BendPak RBJ6000 and $700 above the Atlas MR6K, and the case for it is the warranty and the caster hardware rather than a spec-sheet number.

The 6,000 lb rating is per unit, and a single axle of a passenger vehicle or half-ton truck carries a fraction of that. A jack under the nose of a 5,600 lb Tahoe holds about 3,000 lb. Capacity is never the constraint with this tool. The 30 in of rise puts a sedan's rocker at about 35 in, which is enough to sit upright at a wheel well or roll a transmission jack under on its lowest setting. It is not standing height.

The jobs that fit are the ones done at one end: brakes, rotors, tires, wheel bearings, control arms, tie rods, struts and exhaust sections near the axle. Oil changes work with the front up and the rear chocked. Anything that needs the whole underside level and clear, a transmission pan, a full exhaust or a fuel tank, wants a platform.

The 3.5 in collapsed height is half an inch lower than the BendPak RBJ6000 and half an inch higher than the Atlas MR6K. A stock car clears it. A car on coilovers may need a short ramp. The pads sit on adjustable arms and meet frame rails or pinch welds near the axle, with adapters available for cars whose points sit inboard.

The GS-RBJ6 is air-over-hydraulic. A compressor feeds an internal pump that raises the scissor, and once the mechanical locks are set the air line can be disconnected and the unit stays put. Greg Smith specifies the pressure and volume the pump needs, and a typical 20 to 30 gallon garage compressor meets it. A garage without air has no way to raise this jack, which is the first reason to look elsewhere.

The casters are the GS-RBJ6's strongest feature and the floor is their limit. Polyurethane wheels on sealed bearings roll a 310 lb unit easily across smooth, sealed, level concrete and poorly across broom finish, lipped joints and cracks. A sloped floor lets a loaded unit creep, which is what the caster locks prevent; the manual treats setting them as mandatory before every lift. The jack lives inside a shop or garage and does not go out to gravel.

There is no installation. The unit arrives on a pallet, the pads are adjusted for the first vehicle, and the air line connects. That is a short job for one person. Two units for whole-vehicle lifting are possible but not synchronized, so both ends go up in steps with attention to keeping the car level.

Each GS-RBJ6 has mechanical safety locks that engage as the scissor rises, so the vehicle sits on steel once the lift stops. A relief valve in the hydraulic circuit keeps the air pump from pushing past the rated capacity, and a flow control meters the descent. Caster locks hold the unit still under load. Lowering requires a brief raise to free the locks and a controlled release.

Greg Smith does not list ALI certification for the GS-RBJ6. That is common for rolling jacks sold as standalone tools, because the ALI program covers bridge jacks mainly as accessories to certified four-post lifts, and a commercial shop should confirm with its insurer how it treats a floor-rolling jack before putting one in a bay. For a home garage it is a paperwork question; the scissor and locks are conventional.

The warranty is where the GS-RBJ6 makes its argument. Five years on structure matches BendPak, and 2 years on components doubles BendPak's 1 year and the Atlas MR6K's 2-year limited cover on the parts that wear: the air pump, seals and casters. On a tool whose failure points are exactly those parts, that second year is worth real money.

The BendPak RBJ6000 (around $2,399) is the closest match: a pneumatic rolling jack rated at 6,000 lb with 32 in of rise, a 4 in profile, 350 lb per unit, and a 5-year structural, 1-year component warranty. It costs $100 less than the GS-RBJ6, gives 2 in more rise, and comes with BendPak's dealer network. The Greg Smith answers with a half inch lower profile, sealed-bearing casters and the 2-year component cover. That is a coin toss we would settle on whether a BendPak dealer is nearby.

The Atlas MR6K (around $1,799) is the value rolling jack: 28 in of rise, a 3 in profile, 280 lb, 2-year limited warranty. It costs $700 less and gets under lower cars. For a home garage lifting one end of a car twice a month, it does the same work; for daily use, the GS-RBJ6's build and warranty earn the difference.

The Greg Smith GS-MR6 (around $2,699) is the same seller's fixed mid-rise platform, 46 in of rise, whole-vehicle. It is the answer for a dedicated bay; the GS-RBJ6 is the answer for a shop with several.

The GS-RBJ6 is for a small shop or a serious home garage with a compressor, a smooth floor and more than one vehicle, where most of the work is brakes, tires and suspension at one end of the car and the jack needs to go to the vehicle. Owners who read warranty terms and are comfortable ordering direct from Greg Smith rather than through a dealer are the natural buyers, and shops that already run a four-post lift will know the tool from their runways.

It is the wrong buy for a garage without air, for a floor with joints and cracks, and for anyone who expects the whole car up at standing height. It is poor value as a whole-vehicle lift, because two units cost around $5,000, more than a certified mid-rise for less rise and no synchronization. And it is the wrong buy for someone who wants a dealer to call, where the BendPak RBJ6000 at $100 less is the answer.

For one-end work with air on hand and a preference for warranty over badge, the GS-RBJ6 is the rolling jack we would buy.