Equal-i-zer 4-Point Hitch Review: Steady and Proven, Heavy and Loud

Buy the Equal-i-zer if you want one hitch that keeps a travel trailer tracking straight and puts real weight back on your truck's front axle, and you can live with a heavy, noisy piece of steel. Progress Mfg. builds it in Utah, and the design is simple: two spring arms plug into sockets on the hitch head and rest on L-brackets bolted to the trailer frame. Friction at those four points resists sway, and the tension in the loaded arms spreads tongue weight from the truck's rear axle to its front axle and the trailer's axles.

It asks more of you than a chain-and-cone hitch. Equal-i-zer doesn't publish what the hitch weighs, and owners describe lifting the head as a chore. It creaks, pops and clanks in slow, tight turns, which Equal-i-zer acknowledges. It performs only as well as it's set up, and dealers get that wrong often enough that we'd check their work with a tape measure before the first long trip. The Amazon kit we link also ships without a shank or a ball, so budget for both.

What you get, what you give up

The case for it:

• Sway control that never switches off: the friction at the head and brackets works whenever the arms are loaded, with nothing to engage before rain or wind. It's the thing owners praise most.
• Weight distribution that levels heavy tongues: coupling the trailer lifts the truck's front end, and Equal-i-zer's setup target takes 50 to 100% of that lift back out. Spacer washers and bracket holes let you dial it in.
• Hookup at an angle: the tongue jack does the lifting and the arms swing onto the brackets, so the truck doesn't need to sit square to the trailer.
• Backing up connected: Equal-i-zer allows backing and tight turns with the arms on, provided the brackets sit in the specified range. The exception is a steep change in grade, covered below.
• Surge brakes: compatible, per Equal-i-zer, because the arms slide freely in the brackets.

The costs:

• Weight: a steel head and two spring arms, with no published weight. Lifting it into the bed is the most common complaint after noise.
• Noise: grinding and clanking in slow, tight turns, worst while it breaks in. Grease and nylon bracket jackets quiet it.
• Grease: Equal-i-zer wants the head's friction surfaces and the ball greased before each trip.
• Setup sensitivity: too little tension leaves the front end light, too much unloads the rear axle, and an oversized hitch rides stiff.
• Missing parts in the Amazon box: the 10K kit we link ships without a shank or a ball.

Matching it to your truck, receiver and trailer

Nothing about the Equal-i-zer is specific to an F-150, a Silverado or a Tundra. It fits your receiver, your ride height and your trailer's A-frame, so we haven't matched a version to any truck, and every truck row in the fitment table is a search link with the same checklist. These are the points that decide fit, all from Equal-i-zer's owner's manual, FAQ and shank guide:

• Receiver: Equal-i-zer makes 2 in and 2-1/2 in shanks and says the hitch won't fit a receiver smaller than 2 in. A 3 in receiver takes the 2-1/2 in shank with an adapter sleeve, and only if your truck maker allows it.
• Drop or rise: the standard 12 in shank covers up to a 3 in drop or a 7 in rise, and specialty shanks go further. Equal-i-zer's formula: add 3 in to your receiver height, measured from the ground to the inside top of the receiver tube, then subtract the height of your level trailer's coupler. A positive answer is the drop you need; a negative one is rise.
• Ball: the head takes a ball with a 1-1/4 in threaded shank no longer than 2-3/8 in, rated at or above your trailer's gross weight. Equal-i-zer warns that a longer shank can damage the head and could void the warranty.
• Trailer frame: the standard brackets fit frames up to 6 in tall on the 6K to 14K models. Equal-i-zer sells 4-3/8, 8 and 10 in brackets and publishes guides for Airstream, V-nose, pole-tongue and bottom-mount couplers. The brackets bolt on without drilling.
• Bracket position: 27 to 32 in back from the center of the coupler, the same distance on both sides, which usually clears propane tanks and battery boxes.
• Turning clearance: a rear-mounted spare, an extended bumper or a truck camper can meet the trailer in a tight turn. Equal-i-zer offers an 18 in shank for that, and says the shortest shank that works is the safest.

Work out the shank before you order. Say the inside top of your receiver sits 20 in off the ground and your level trailer's coupler top is at 22 in: (20 + 3) minus 22 is 1, so you need 1 in of drop, which the standard shank covers. A truck that sits higher, with a 26 in receiver and the same trailer, needs (26 + 3) minus 22, or 7 in of drop, which takes a specialty shank. Equal-i-zer's shank calculator does the same sum.

Sizing it and reading the ratings

Equal-i-zer sizes the hitch by tongue weight and trailer weight, and the tongue rating is the one that bites. Its FAQ points out that most trailers carry 10 to 15% of their weight on the tongue, so you'll usually reach the hitch's tongue limit before its trailer limit, and its manual warns that towing with tongue weight outside that 10 to 15% band raises the risk of losing control. Here's the line, with what we found on Amazon on October 21, 2026:

Ratings and model numbers come from Equal-i-zer's product page and owner's manual; on Equal-i-zer's own size guide, the model number ending in 1 is the version without a shank. Equal-i-zer says every model except the 4K comes with a 2-5/16 in ball pre-installed, but each Amazon title we checked says the ball is not included, so read the listing at checkout. Spring arms fit only a head of the same rating, so you can't move up a size by swapping bars. Equal-i-zer doesn't publish the weight of the hitch or an install time.

Size from your loaded tongue weight, never the brochure. Equal-i-zer's own installation tips make the point: a travel trailer with a 920 lb dry tongue weight can pass the 1,000 lb rating of the 10K model once two propane tanks and two batteries go on the tongue. Equal-i-zer also counts cargo you carry behind the truck's rear axle. If you expect the hitch to distribute it, that cargo plus the tongue weight has to stay under the hitch's tongue rating. A 900 lb loaded tongue plus 150 lb of firewood and coolers in the bed behind the rear axle is 1,050 lb, which is past the 10K and into 12K territory.

Equal-i-zer's FAQ calls buying the larger hitch the smart practice when you're unsure. We'd weigh before we'd size up. Two owners who bought more hitch than their tongue needed found the ride stiff. A tongue scale or a run across a CAT scale settles it, and Equal-i-zer's support line will check your numbers with you.

Your truck's limits come first

The lowest rating in the chain decides what you can tow, and the hitch is rarely the lowest. Equal-i-zer's manual says never to exceed the specified weight ratings for the trailer, the tow vehicle, the hitch, the hitch ball or any other towing equipment. That list includes your truck's tow rating for its exact configuration, its payload and rear axle ratings, its tongue-weight limit with and without weight distribution, the receiver's rating, the hitch, the ball, the trailer's coupler and the tires. We don't print any truck's ratings: they change with cab, bed, engine, axle ratio and package, and they live in your owner's manual, the towing guide for your model year and the label on the driver's door jamb.

• Weight distribution itself: your owner's manual says whether your truck maker allows a weight distribution hitch on your truck, whether it calls for one at your trailer and tongue weight, and what the receiver is rated for with and without it. Follow it, then Equal-i-zer's manual, then your state's rules. If your truck maker sets its own minimum or maximum for how much front-axle load to restore, Equal-i-zer's manual defers to it.
• Payload: weight distribution moves load between axles; it doesn't make any of it disappear. The full loaded tongue weight, the hitch itself, everyone in the cab and everything in the bed count against the payload on the door-jamb label.
• Trailer brakes: whether you need them, and which brake controller, follows your truck maker, your trailer maker and state law.
• Air suspension and auto-leveling: Equal-i-zer's manual says to turn these off while you set up the hitch, because they reduce the weight distribution you get afterward. It says a four-corner auto-leveling system cuts weight distribution by 20 to 25%, so if yours can't stay off while driving, set the hitch to 75 to 100%. Follow your owner's manual on how to switch it off.
• Electronic trailer sway control: Equal-i-zer's manual, FAQ and troubleshooting guide say nothing about a truck's own electronic sway control. Check what your owner's manual says about towing with a weight distribution hitch and leave the truck's systems as your truck maker directs.
• Rough ground: Equal-i-zer says not to tow with the hitch engaged on rough roads, through deep ditches and dips, or while launching a boat, and to disengage the weight distribution before towing or backing across a significant change in grade, such as from a level street up a steep driveway.

On the highway: sway control and weight transfer

Sway control is why most owners buy it, and it earns its reputation. Downward pressure from the tongue and upward pressure in the loaded arms clamp the arm sockets in the head and the arms on the L-brackets, so the friction rises with the load and there's nothing to engage. Owners towing long travel trailers describe crosswinds and passing semis as a push they feel through the wheel, not a trailer that wags.

It isn't a cure-all. A handful of owners still fought sway with it, mostly on long, heavy trailers, and most of them moved to pricier hitches we haven't reviewed, such as ProPride, Hensley and Weigh Safe. Two Gen13 F-150 owners towing the same 2600RB travel trailer model came away with opposite verdicts: one crossed strong west Texas winds without trouble, the other had terrible sway across Arizona and New Mexico. When it does sway, Equal-i-zer's first suspects are the setup and the load: too little tension in the spring arms, too little weight back on the front axle, tongue weight under 10% of the trailer, or tires that aren't at their correct pressure. Its manual adds that no hitch setup guarantees sway will be avoided altogether.

Weight transfer is the other half of the job, and the scale shows how much the setup matters. On a 2022 F-150 PowerBoost with a 1,000 lb Equal-i-zer, the front axle weighed just 80 lb less hitched than it did solo. A 2026 F-150 whose dealer had set the L-brackets a hole too low came in with the front axle 260 lb light and, by the owner's math, the rear axle over its rating; moving the brackets up one hole brought the front wheel well back to about its unhitched height. Both owners checked those numbers against their own door-jamb ratings, and yours will differ.

The ride is firm. Owners coming from a chain hitch with a bolt-on friction bar mostly call it a big step up, but an oversized hitch or an aggressive setting can make the truck porpoise over expansion joints. The friction that resists sway can also resist the rig straightening out after a turn, and one owner sold theirs over it.

Noise, weight and upkeep

You'll hear this hitch. Equal-i-zer says the high-pressure friction can produce loud grinding or clanking, mostly while a new hitch breaks in and in slow, tight turns where the truck and trailer twist against each other. At highway speed it rarely registers; in a quiet campground, the people in the next site will hear it.

• Grease the head: Equal-i-zer's manual calls for cleaning and greasing the surfaces where the arm sockets rub the head's plates, and the ball, with multipurpose or bearing grease before each trip. Leave the L-brackets and spring arms dry. Owners find a greased head is a much quieter head.
• Bracket jackets: Equal-i-zer's nylon Sway Bracket Jackets sit between each arm and its L-bracket. Equal-i-zer says they slightly reduce the bracket friction and leave the head's sway control untouched, and owners who added them report far less clanking. If your hitch has the newer one-piece L-pins, make sure the jackets you buy clear them; owners found the original jackets did not.
• Weight: with no published figure, plan on a heavy lift. Some owners carry the arms separately and lift the head on its own.
• Stiff sockets: the arm sockets are supposed to resist turning; that's two of the four friction points. Equal-i-zer says new ones loosen as they break in, and its manual warns against hammering on them.
• Rust: Equal-i-zer suggests storing the hitch out of the weather and touching up worn paint.

It lasts. Owners report 10 to 15 years on a single hitch and mileage from 40,000 to around 100,000, and the design is big pieces of steel with few wear parts. Those are older hitches, so read them as the design's track record rather than a promise about the one in the box. Breakage does happen: cracked arm sockets, cracked welds on the head, bowed or cracked L-brackets, and in the worst reports a head that cracked through near a weld while a socket bolt sheared. Some trace back to installation, most often a hitch ball whose threaded shank is too long, so the sockets hit the threads in a tight turn and crack, exactly the failure Equal-i-zer's manual warns about. Others were cracked welds with no confirmed cause. Equal-i-zer's manual says to check the hitch for damage and abnormal wear at the start of every trip; look hard at the sockets and the welds on the head when you grease it. In most of the reports that say how it ended, Equal-i-zer replaced the head, sockets or brackets, and the owners who mention the cost say it was free.

Equal-i-zer's limited lifetime warranty covers latent defects in materials and workmanship for the original purchaser's ownership. Ordinary wear is excepted, you need a return authorization and pay the shipping to send a part back, labor isn't covered, and neither is damage from improper installation, alteration, poor maintenance or overloading. The warranty text in the manual says nothing about where you buy, and our Amazon link was sold by Amazon.com at our check. Register the hitch on Equal-i-zer's site when it arrives.

Equal-i-zer or Andersen?

If you're choosing between this and the Andersen No-Sway, the tradeoff is clean. Here's how the two compare on what each maker publishes:

The weight-transfer row compares different yardsticks, so don't read the numbers head to head: Equal-i-zer measures how much of the front end's rise the hitch takes back out, Andersen how much tongue weight moves forward. They point the same way owners do. Owners who have run both describe the Equal-i-zer as moving more weight, and owners who left the Andersen for a spring-bar hitch mostly landed on an Equal-i-zer. Hooking up at an angle also favors the Equal-i-zer, since there's no sway plate to square. The Andersen wins on everything you carry and hear: it's lighter (under 60 lb by Andersen's figure, and owners who have used both agree), grease-free and quiet. Two owners went the other way, one with a 19 ft trailer and one after a hitch failure.

Pick the Equal-i-zer when your loaded tongue is heavy for your truck and you need the front end back. Pick the Andersen when your truck has capacity to spare, you'd rather not lift a heavy head, and quiet hookups matter more to you than maximum weight transfer.

Setting it up, and checking the dealer's work

Equal-i-zer's owner's manual is the setup procedure, and it carries the torque value for every bolt along with the socket sizes to reach them. Use its numbers, not ours or a forum's; you'll need a torque wrench big enough for the shank bolts and the hitch ball. Before measuring anything, load the truck and trailer the way you'll travel, park them in line on level ground, chock the trailer, set the tire pressures, and switch off any auto-leveling.

1. Set the ball height: level the trailer, mount the head on the shank with the top of the ball 0 to 1 in above the top of the coupler, start with six spacer washers, and hand-tighten.
2. Hang the brackets: 27 to 32 in from the coupler's center, equal on both sides, with the link plates pinched flat against the frame and no gap at the top or bottom. Equal-i-zer says not to use an impact wrench on these bolts.
3. Measure three times: front wheel well height through the axle centerline with the trailer uncoupled (A), coupled with the arms off (B), and coupled with the arms on (C). Average the driver and passenger sides.
4. Work out the percentage: 100 x (B - C) / (B - A) is your weight distribution. Equal-i-zer wants 50 to 100%, never above 100%, and if your truck's owner's manual gives its own range, stay inside that too. Under 50, add spacer washers or raise the L-brackets; over 100, remove washers or lower them. Keep at least 3 in between the end of each arm and the center of its bracket.
5. Level the trailer: if the front and rear of the frame differ by more than 1-1/4 in, move the head on the shank, then measure C again.
6. Tighten and recheck: torque everything to the manual's values, check every bolt before each trip, and recheck the weight distribution after the first 50 to 100 miles. Equal-i-zer says the angle set bolt on a new hitch may need retightening after the first 150 miles.

Equal-i-zer's own example runs 30 in uncoupled, 31 in coupled without the arms and 30-1/4 in with them: 100 x (31 - 30-1/4) / (31 - 30) is 75%, inside the band. Had C stayed at 31 in, you'd be at 0%, with the front end as light as if you had no weight distribution at all. Had it come back to 29-3/4 in, you'd be at 125%, which Equal-i-zer warns can take too much weight off the rear axle and cost traction on slick roads.

Then check whoever set it up, dealer included. Owners keep finding dealer setups with the L-brackets too low, hitch balls with shanks too long for the head, or bolts run down with an impact driver instead of a torque wrench. Ten minutes with a tape measure and the formula above catches the first; reading the ball's shank length against Equal-i-zer's 2-3/8 in limit catches the second.

Day to day, hookup is quick: couple, raise the tongue jack until the arms swing onto the L-brackets (the included snap-up lever helps), pin them, and lower the jack. If the jack runs out of travel, a block under its foot buys the height. Unhitching reverses it, under one rule from Equal-i-zer's manual: never loosen or remove any part of the hitch while it's under load, and take the tension off with the tongue jack first. On a campsite where the truck and trailer sit twisted against each other, one arm can stay loaded. One long-time owner's fix is to back the loaded L-bracket's bolts out slowly. We wouldn't: that is loosening part of the hitch under load, which the manual rules out. If the tongue jack can't free both arms where you're parked, move the rig to level ground first, or call Equal-i-zer.

Where we land on the Equal-i-zer

Buy it if your loaded tongue weight takes a big share of what your truck can carry, you tow a long travel trailer, and you want sway control you never have to switch on. Size it from a scale ticket, set it up with a tape measure or check whoever did, grease the head, and add the bracket jackets if the noise bothers you. Of the two weight distribution hitches we've reviewed, it's the one we'd put on a truck with a heavy tongue behind it, as long as the truck's ratings, not the hitch's, set the limit.

Look elsewhere if lifting a heavy steel head is a problem for you, if campground clanking will grate, or if your truck has plenty of capacity to spare and you mainly need sway control, where the lighter, quieter Andersen makes more sense. No hitch raises your truck's tow, payload or tongue-weight ratings.