Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW
(751 reviews)
Price: $800.00
In Stock
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW
Item # EQ37040ET
Our Price: $800.00
In Stock
- All Info
- Reviews (751)
- Q & A (0)
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Equal-i-zer Weight Distribution Hitch - EQ37040ET
- 200 lbs
- 300 lbs
- Fits 2 Inch Hitch
- WD With Sway Control
- Allows Backing Up
- Equal-i-zer
- Includes Shank
- Electric Brake Compatible
- Surge Brake Compatible
- Some Sway
Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. 2" Hitch ball and adjustable shank included.
Features:
- Evenly distributes weight over axles of tow vehicle and trailer for stability and control
- Creates a level ride for both tow vehicle and trailer
- Integrated 4-Point Sway Control limits side-to-side movement
- Brackets keep spring bars in place for a rigid system that holds trailer in line
- No lift chains - eliminate unwanted movement
- Steel-on-steel friction helps to minimize sway caused by winds or sudden maneuvers
- Unique design makes system compatible with surge-type brake actuators
- Spring bars flex for a controlled, even ride
- Constructed of chromoly steel for superior dexterity and spring
- No-drill, clamp-on brackets can be adjusted along the trailer frame
- Accommodates frame-mounted items such as gas tanks, battery boxes, toolboxes, or generators
- Desired tilt is achieved with traditional washer design
- Add or remove washers from spacer rivet to tilt head up or down
- Dipped steel construction is durable and corrosion resistant
- Snap-up lever eases installation by reducing lifting required by trailer jack
- System includes head assembly, adjustable shank, spring bars, sway control brackets, 2" hitch ball, lift handle, pin and clip, and all necessary hardware
- 1-7/8" Thin walled socket (EQ70-00-4800 - sold separately) recommended for hitch ball installation
- Made in the USA
Specs:
- Tongue weight: up to 400 lbs
- Gross towing weight: 4,000 lbs
- Ball size: 2"
- Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
- Sway control bracket positioning: 25" - 32" back from center of coupler
- Maximum trailer frame height: 6"
- Shank length:
- 8" From center of hitch pin hole to center of adjustment holes
- 9" From center of hitch pin hole to front of shank
- 7" From center of hitch pin hole to back of shank
- 12" Overall
- Total height adjustment along shank: 7-1/2"
- Maximum rise: 7"
- Maximum drop: 3"
- Overall height: 9-1/2"
- Holes are spaced 1-1/4" apart on center
- Spring bar dimensions: 36" long x 1" wide
- Limited lifetime warranty
| Included w/ System | Required - Sold Separately | Optional Add-Ons |
|---|---|---|
90-00-0400 Equal-i-zer Weight Distribution Hitch
| n/a |
|
Create a more stable ride for your tow vehicle and trailer with a weight distribution hitch. Adding spring bars to your towing system applies leverage, which transfers the load that is pushing down on the rear of your vehicle to all the axles on both your tow vehicle and your trailer, resulting in an even distribution of weight throughout. The result is a smooth, level ride, as well as the ability to tow the maximum capacity of your hitch.
Selecting a Weight Distribution System
The tongue weight rating is the most important factor in determining which size weight distribution system you should use. If the bars of the system you choose are rated too high for your setup, they will create a rigid ride, which can result in a bouncing trailer. If, on the other hand, the bars are not rated high enough, the system will be unable to properly distribute the weight, rendering it virtually useless.
To determine the proper weight rating for a weight distribution system, you must first determine your trailer's tongue weight. Then add to that the weight of the cargo behind the rear axle of your tow vehicle. These two measurements make up the tongue weight rating for a weight distribution system.
Features of the Equal-i-zer
Head Tilt Adjustment
The Equal-i-zer weight distribution system uses the traditional washer-style adjustment method to achieve the perfect tilt. Controlling the head tilt helps you to fine-tune the leverage on your entire system, making it easier to install and hook up the spring bars. To adjust the tilt, simply slide washers onto the spacer rivet and insert the rivet into the head assembly. To increase the angle, add a washer. To reduce the angle, remove a washer. Most setups take four to six washers to achieve the proper height. Once you get the desired tilt, insert the shank bolts to secure the head to the shank and then tighten it in place.
Construction of Spring Arms
The Equal-i-zer spring bars are not made of traditional spring steel. Rather, they are constructed of a chromium-molybdenum alloy steel. Chromoly steel has a high tensile strength for extreme durability. It also features excellent dexterity, which allows it to give as required and then return softly back to its original form. This pliability is important in minimizing trailer bounce while still ensuring that the weight of your rig is adequately distributed.
Fixed Sway Control Brackets
The unique sway control brackets of the Equal-i-zer are easy to install and simple to use. They clamp onto your trailer frame and conveniently adjust to a position anywhere between 29 inches and 32 inches back from the coupler. These brackets provide the attachment points for the weight distribution spring bars. To position the spring bars during hookup, simply use the included snap-up lever to lift each bar into place on the L-shaped brackets. Then secure the bars in place with the included L-pins and clips.
Equal-i-zer Hitch 4-Point Sway Control
The Equal-i-zer weight distribution system works to stop trailer sway before it begins. This is achieved through the rotational friction that is present in the weight distribution hitch itself. Within the system head, the downward pressure that is placed on the hitch ball by the trailer is combatted by the upward pressure exerted by the spring bars that are mounted in the sockets. This upward force is placed on the spring bars on either side of the system, creating the rotational friction that, essentially, forces your trailer in line. This type of friction is responsible for two points - one on either side of the trailer - of the 4-Point Sway Control. To ensure that enough tension is present, make certain that the socket bolts in the head assembly are torqued to at least 45 foot-pounds.
The other two points of sway control are created by the steel-on-steel friction that occurs when the spring bars slide within the L-brackets that are mounted on the trailer tongue. Most traditional weight distribution systems have spring bars that are suspended by chains. Although this ensures that the system is not so rigid as to create bounce in the trailer, it also allows a good deal of side-to-side play in the system. Letting the spring bars hang freely minimizes the rotational friction described earlier. It also eliminates your system's ability to create the type of direct friction that has been shown to be so effective in limiting trailer sway.
This direct friction that is applied to the spring bars in the Equal-i-zer system helps to stop sway once it has begun. The concept is similar to the way in which an add-on friction sway control device functions. When each spring bar moves forward or backward, or side to side, it rubs along the bracket, creating friction. The resistance created by this action limits the movement of the spring bar, thus preventing further side-to-side movement of the trailer.
Most add-on units feature some sort of friction material similar to that used in automotive brakes. But the Equal-i-zer uses direct steel-on-steel contact to create resistance. This is the same sort of friction that is used with locomotives that pull loaded railcars weighing tons. No additional materials are needed. The steel will outlast any of those other materials, providing an extremely durable, functional sway control system.
EQ37040ET Equalizer Weight Distribution Hitch with Adjustable Shank and Hitch Ball - 4K
Compare to Reese 66557
Installation Details
Customer Reviews
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW - EQ37040ET
Average Customer Rating: 4.8 out of 5 stars (751 Customer Reviews)
Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. 2" Hitch ball and adjustable shank included.by: Michael 05/02/2024
This WDH has been terrific. My only complaint and why I only gave it 4 stars is because on the initial set up you have to have a special thin walled socked for the bolt for the ball. I tried several thin walled sockets including and etrailer one and all were too thick. So I ended up getting the equilizer socket, but that one is VERY expensive. It seems a bit much to first pay top-dollar for the WDH AND then have to buy their special socket.
by: Dave 09/01/2022
Towing 3400 lbs hybrid camper with ford flex (tow rating 4500). Makes a world of difference. Car downshifts less, rides more level and experiences very little sway. Wasn't cheap, but was worth the money as an improvement over towing without distribution hitch.
by: Smith08/18/2019
The Equilizer hitch has made towing much, much better for a short, single axle travel trailer. There is zero sway. The only issue we've had is that the brackets mounted to the trailer frame tend to slide or tilt occasionally, so periodic adjustment is needed. The hitch isn't as noisy as I was expecting. Love the easy setup and tear down, too.
by: Todd12/21/2017
I ordered a weight distribution system for my camper. I needed rush delivery. The folks on the phone were great and I received the order on time and it worked out great.
by: Jeremy12/20/2017
Love the equalizer Hitch. Even more so I love this site. Awesome prices and I received my Hitch three days before I thought it would come.
by: Thomas06/16/2018
Great product. Pulled a rockwood A212 with a Nissan Murano made a world of a difference. Good Distribution of the weight.
by: Greg06/27/2019
Preston took a lot of time researching the right product for my application.
He was patient while I got him the measurements.
Thanks much.
by: Tampa RV10/11/2016
Excellent customer service and follow up thru the the entire process. Found what we needed when no one else could on etrailer
by: Wendi05/31/2018
We’ve only used the hitch once but it’s been easy to use. Service was great! Would definitely buy again.
by: DavidD05/15/2019
Love it! Highly recommend it!
Comments
Great product, recommended for any towing close to maximum capacity. Excellent sway control
DavidD - 05/17/2020by: Robin 06/26/2023
by: Frank 04/10/2021
by: German 03/15/2023
by: Frank01/14/2023
Well made, heavy duty, easy to assemble, and install. Only one issue, the sockets that the sway bars go into are virtually immovable. I had to loosen the bolts and beat on them with a rubber mallet to get them to move (they are supposed to move freely). I contacted the manufacturer directly via their customer service, and was informed that there is a 4 trip break-in period and that “eventually” the sockets will move easier. This disclaimer should be noted in the advertisement for this hitch.
Comments
Excellent!!!! The hitch is fully broken in. The connect and disconnect process is a breeze and takes very little effort.
Frank - 01/15/2024by: Smithsonite11/22/2022
First 400 mile tow today, 50% of that way loaded. Performed flawlessly, although I don't think I have it set up 100% yet. Finding a perfectly level spot in MA is an exercise in futility. I did the best I could with the trailer level in my shop on concrete, but the truck hanging out and nose down and to the left a bit. I think I need more tension. Rides real stiff compared to the Reese SC system I was forced to retire early due to parts being NLA (lost a torsion bar on a recent tow - don't know if it broke, or just slipped out - either way, I'm DONE with Reese!). As of right now, the bars feel like they have unequal tension, too. When unloaded, the left bar sits tight to the L-bracket, while the right bar is easily lifted by hand. Could be that my receiver is worn out - she's got some miles on her. Don't think anything is bent anywhere, but who knows. Anyway, these parts are HEAVY, strong, American metal - I have no doubt this thing will outlast that Reese system I had. Now to put in some work to try and get the ride quality back like the old system.
Comments
Not a big fan of this system. The unequal tension of the bars became worse when I got rid of my 07 Silverado 1500 for a 93 Ram W250 with a custom flatbed Its 11 higher, so everything had to be reset to a new, longer hitch. The Reese system was really good - so infuriating that they discontinued it AND parts for it! The way of the world today. Im probably going to scrap this entire setup, and trailer, for a gooseneck for less hassle, more stability, & speed of hookup.
Smithsonite - 11/30/2023by: Wilton09/26/2019
I rate this product "good" to alert potential users to an issue I face during installation of this Equal-i-zer hitch.
As I purchased this hitch, a 2 and 15/16" ball with a 1.25" shank stud and its nut were included. That nut requires a special 1 and 7/8" thin walled socket that slips down into a cavity where the shank stud protrudes and the nut screws on. The instructions state that socket is available at Equal-i-zer dealers. Such a socket WAS NOT AVAILABLE at any automotive parts store, car dealership, nor agricultural supply hardware I contacted in the small California town I was in. The nearest Equalizer dealer to me was over 100 miles distant, and I had planned to leave the day I began installation of the hitch. The instructions also state that a shim can be used if a 2 and 15/16" ball with a 1" shank stud and nut are used. That is the ball I already had on my truck and I was fortunate to find a properly sized shim at an agricultural supply hardware that I cut to length and used in my installation. I still needed a large socket and extension to tighten the nut because the nut was deeply recessed in the cavity. The box end wrench I normally used on the nut was of no avail; however, an automotive repair shop had such a socket and loaned it to me to complete the installation of the hitch. IF you are going to undertake the installation of this hitch yourself, then be aware of the need for either the special Equal-i-zer specified socket for the ball included, OR a 1.25" to 1" shim and a deep well socket for the smaller 1" shank stud and nut such as I used. Contact customer service at Equal-i-zer if you have questions in this regard BEFORE you purchase.
Having alerted you to the installation issue I faced, I now rate the product itself as EXCELLENT in performing the job it is intended to do when towing. Once I had the hitch installed, the instructions for making adjustments so it will perform as intended are clear. Along with the hitch I purchased a Sherline trailer tongue scale and that is an accessory I highly recommend.
I was towing a 2-axle car trailer loaded with a vehicle for a total tow load of 5500 lbs.
Using the tongue scale I adjusted my load so 10% was on the tongue. I was towing cross-country from California to Michigan with a 2010 Tacoma 4 x 4 rated with a 6500 lb towing capacity. I towed at 55-60 mph and had one incident that required immediate, heavy braking and the truck and trailer stopped perfectly, as if the trailer had no been there. So keep in mind, my rating of GOOD was to draw your attention to the installation issue I faced. The PEFORMANCE of the hitch was EXCELLENT.
Comments
The thin walled socket needed to install the hitch ball is available as a Related Item here at etrailer. Equal-i-zer offers such a socket as part # EQ70-00-4800
Thin Walled Socket for Equal-i-zer Hitches
$87.54. We have also found that the Powerbuilt 1-78 Inch Thin Walled Socket, part # ALL643216
1-7/8" 12pt Thin Walled Socket - 3/4" Drive - Chromium-Vanadium Steel
$22.94, works well with the Equal-i-zer system.
-- Thin Walled Socket for Equal-i-zer Hitches
$87.54. We have also found that the Powerbuilt 1-78 Inch Thin Walled Socket, part # ALL643216
1-7/8" 12pt Thin Walled Socket - 3/4" Drive - Chromium-Vanadium Steel
$22.94, works well with the Equal-i-zer system.
Victoria B - 10/08/2019
Helpful LinkMy Equal-i-zer hitch continues to perform as I had wanted and described in my review. It has an unstated safety benefit. I tow long distances without a load on my trailer. I keep the Equal-i-zer hitch fully installed but adjusted so there is only mild tension transferred forward. That keeps the receiver ball housing on the tongue of the trailer constantly pressed against the hitch ball. If for any reason the ball coupling lock should fail or have not been set, the trailer would remain coupled to the truck.
Wilton M - 09/27/2020by: Richard P.06/04/2018
I received this hitch a few short days after placing my order and as soon as it arrived I unpackaged it to admire the contents. Everything was intact and ready to assemble, just as expected. I also ordered the special thin walled socket, which I am glad I did since my mechanic friend that did my torquing didn't have a socket that would work for this hitch ball. I know it is expensive but I wanted everything done right.
I installed the hitch and set it up following the directions in the manual, and everything turned out perfectly. I think from start to finish it took the wife and I less than an hour and a half. Easy, and according to my measurements and a visual everything looked perfect. None of this is rocket science, and the installation is truly easy.
Well, time to try it out, and what great timing, we left Saturday morning in a 40 MPH headwind for 20 miles, and then another 25 miles with the wind quartering at us on a busy highway. This hitch worked flawlessly! I was tickled with the whole ordeal, and today coming back with no wind at all it wasn't much different than the day we had the wind. You know what wind means, right? WINDY IN ND. Yep, we get our share. This hitch served us very well, and I am extremely pleased with my purchase and the ease of installation and set up. I would order it again in a heartbeat.
My tow vehicle:
2018 GMC Sierra 1500 with max trailer tow package. 6.2 L with 8 speed transmission.
My travel trailer:
2016 Jayco Octane SL, weighs in loaded at 6100 lbs with a hitch weight of 910 lbs.
Comments
A whole year has gone by, and Im still extremely satisfied with my equalizer hitch. I hear the squeaks when I make my turns, I know people talk about this hitch being slightly noisy, but every time I hear it I smile. I know its back there, doing its thing, and it does it extremely well. I would buy this hitch again in a New York minute. I am very pleased. Did I say Im VERY pleased? Lol. Its that good.
Richard P - 06/04/2019by: Tony09/06/2018
Just received and put together my Equalizer hitch but not set up or used with our new travel trailer yet. The quality of the parts are amazing. I have used other weight equalizing hitches and have 5th wheel hitch systems. This system is heavy duty and a pleasure to put together. Etrailer did a great job on the website describing, illustrating and proving support to make my decision so easy. Thanks Etrailer. Going to pick up new travel trailer today with new hitch system.
Comments
I am pulling a 34 foot travel trailer that weighs 7,280lbs. I am very comfortable and feel secure while towing with the equalizer hitch system. There is absolutely no sway even when tractor trailer pass by. I have used other sway control products and systems where I encountered sway and white knuckle rides. I highly recommend the Equalizer 4 point sway control system to anybody thinking about a new or replacing a current system.
Tony - 09/06/2019by: MarkG01/23/2019
I have been using this EQ hitch towing my Bullet crossfire travel trailer with my F-150 for over a year now and it handles great. Tows smooth and without jerking or a rough ride. It took a few times to properly balance it and adjust it properly but what a major improvement from towing without it. I recommend this EQ hitch very much!!
Comments
Excellent! I have towed over 5000 miles in 2 years with this hitch now and it is still like new. What a great purchase.
MarkG - 01/24/2020by: Mark T08/11/2018
Product is well made and sturdy. Installation instructions were simple and easy to follow. Took about 2 hours from start to finish to install. The problems it solved for me were the truck sagging in the rear when my car hauler is coupled. Now the truck is level along with the trailer. Also when semi's pass by the entire set up is steady. No shaking or swerving. Wish I had put this on sooner. Very pleased.
Comments
After a year of use I can say that the Equalizer has lived up to its promise. It is extremely helpful when hauling autos around in our enclosed trailer. We consider it just part of the normal hauling equipment now.
Mark T - 08/14/2019by: Bryan03/09/2024
The experience of ordering this hitch from Etrailer.com was great! Very helpful and professional people. I have had the Equalizer hitch previously. I upgraded to a HD truck and needed a new receiver size, as well as going with a higher load capacity of 16k lbs. These are great weight distribution hitches in every way.
by: Justin12/05/2023
This is Amazing! Works really well! Gotta grease it a lot at all the moving parts before you roll with it. If you don’t it makes horrible noises. That’s my only issue with it. And if you could get more tongue weight too! That would be Awesome! But can’t have your cake and eat it too! Thanks
by: KP06/22/2022
Great hitch system. Easy directions to mount and set up for my truck (F150) and Grand Design Imagine travel trailer. Hook up at camp site is much easier compared to my chain and bar system. New set up handles sway and is very stable when trucks and cars pass.
by: Tom D07/15/2016
Ordered the Equal-I-zer weight dist hitch as a reaplacement for original W/D anti-sway hitch trailer dealer sold me (was getting quite a bit of sway). Relatively easy to install, instructions were very easy to follow, getting a torque wrench (430 ft-lbs) for the ball had been my only concern. Weight distribution was right the first time, truck and trailer sit nice and level. The trailer tracked very well and there was no sway when being passed by large tractor-trailers. Less noise than I expected after reading reviews when researching hitches. Very happy with the hitch and the GREAT service from etrailer. Highly recommend.
by: Lance03/23/2024
All products are great and as expected. One box was damaged in shipment due to the heavy nature of the parts. A smaller part fell out through a hole in box. George at etrailer got me a replacement part quickly with no issues.
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view full answer... - Trailer Hitch and Tow Capacity of 2018 Lexus RX 350I Googled the owner's manual for a 2018 Lexus RX 350 and it said the maximum towing capacity was 3,500 lbs, and the Curt Trailer Hitch Receiver # C13272 has a 4,000 lb towing capacity so you will not have any problems using this hitch for towing less than the 3,000 lbs you mentioned. That said, we do recommend verifying all towing capacity information with vehicle manufacturers as they have the final say on these matters.
view full answer... - Equal-i-zer Weight Distribution Vs Chain Style Weight Distribution HitchesI do not feel that the chain style weight distribution hitches work as well as the Equal-i-zer style systems. Most chain style hitches require you to use a separate sway bar to prevent sway and it must be removed while maneuvering. The Equal-i-zer is built in and you will not need to remove any parts to back up or maneuver your trailer. While there are systems similar to the Equal-i-zer their build quality and reputation speak for themselves. And you are getting a hitch that is made in...
view full answer... - Towing Package for a 2008 Honda OdysseyThe trailer hitch I recommend for your 2008 Honda Odyssey is the Draw-Tite Max-Frame # 75270 because it doesn't require any fascia trimming (like the etrailer and Curt might). This, as well as the other trailer hitches, exceeds the weight ratings of your Odyssey so you can be confident that you are getting the most out of the trailer hitch. Be sure to check the weight ratings of your Odyssey in your owner's manual and keep from exceeding it. To finish out your towing setup I recommend...
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- Reccomneded Weight Distribution System for a Lifted Jeep WranglerIf the gross trailer weight (GTW) is over the 50% of your gross vehicle weight rating (GVWR), the use of a weight distribution system is recommended. In order to be sure you are choosing the correct weight distribution system, you will want to find the total tongue weight of your towing setup by adding the tongue weight of both your loaded and ready to tow trailer and any cargo stored behind the rear axle of the Jeep. The average total tongue weight (TW) rating of a trailer is typically...
view full answer... - How To Measure To Ensure Proper Weight Distribution System SetupThe owner's manual for the weight distribution system should have a section that details how to check that the system is setup and adjusted properly. This is usually done using a series of measurements of the tow vehicle loaded/unloaded. I have attached a clip below which is from the instructions for the Equal-i-zer Weight Distribution Systems like part # EQ37040ET. I am not aware of anyway to verify setup using standard scales.
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- What is Best Way to Prevent Suspension Sag with 2016 Ford F-150 Towing Travel TrailerHey Orlando, it's interesting that the dealer recommended against a weight distribution system because that would actually be your best solution to level your truck when towing. A suspension enhancement solution for the truck like an air bag setup would provide additional support to level the truck but that's as far as the benefits really go. A WDH system is going to actually put some of that tongue weight up on the front axle of the truck which greatly helps braking and handling so it's...
view full answer... - Light Weight Weight Distribution System for 2008 Nissan Frontier Towing CamperWeight distribution systems are somewhat heavy, but a simple setup like the Equal-i-zer part # EQ37040ET would be your best option. It has sway control built into the head and bars so the weight needed for it is pretty minimal. It weighs in at 67 lbs. It has a tongue weight range of up to 400 lbs so it would be a great solution for your trailer's tongue weight as well.
view full answer... - How To Eliminate Sag and Sway While Towing Boat Trailer With Subaru Outback WagonI do have a solution to not only prevent sway while towing your boat trailer with the 2018 Subaru Outback Wagon but also prevent sag. The Coil SumoSprings part # CSS-1125R are good for leveling out the vehicle and helps to reduce body roll but are not designed to help with the sway you have described. The 19MM Subaru Outback Rear Sway Bar Kit that you mentioned may eliminate rear sway at higher speeds but it is not going to eliminate the sag. I recommend a weight distribution system to...
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