Helper Spring Solution for 2021 Toyota 4Runner Towing 3700 lb Travel Trailer

Question

Question:

i puchased anew 2021 4runner a few weeks back,and will be towing a 17 viking tt with a loaded weight of 3700lbs,empty its 2700,two questions,the factory hitch bolts to the cross member,due u guys know what the rated tongue wieght is by chance? this hitch doesnt look like to me its rated at 5000lbs but the dealer swears it is,second is the squat when im hooked up, was 1.75-2.00 inches would the timbren set up work to correct the squat? rated towing @5000lbstongue weight,who knows,dealer says 500lbs, im pretty skeptical about these specs,if the timbren would correct the squat i will buy them,please advise

asked by: Brad

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Expert Reply:

I wasn't able to determine the capacities of the OEM hitch on your 2021 Toyota 4Runner, the only references I could find was to the 500lb TW/5000lb towing capacity of the vehicle itself 'When Properly Equipped'. In the list of equipment needed to achieve that, the 'integrated towing hitch receiver' was mentioned, so it would be a very safe assumption that the hitch capacity would match that of the vehicle.

With a loaded weight of 3700 lbs, the tongue weight would range from 370-555 lbs, so you'll want to watch how you load the travel trailer so you don't exceed that 500 lb tongue weight limit.

The Timbren # TTORSEQ you mentioned would help with that sag by offering up to 6000 lbs of additional support but Timbrens can also make for a fairly rough ride that you might not be happy with.

The SumoSprings, part # SS78DR would be a better choice because they're made of a softer material that would provide a significantly better ride quality. They offer up to 1000 lbs of additional support which is plenty to handle any sag caused by the tongue weight of the travel trailer you mentioned.

I've linked to a product description video for the SumoSprings # SS78DR helper springs I mentioned.

expert reply by: Mike L

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Answer 1

Between the 1,400 lb SumoSprings Solo Custom Helper Springs #SS68DR and the 1,800 lb Kit #SS78DR I recommend going with the 1,800 lb kit. These won't affect your daily drive but will offer the support you need when you are going Overlanding. If…

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Answer 2

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle…

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Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

Hey Doug! The Firestone Ride-Rite Air Helper Springs #F35FV are the right kit for your 2026 Ford F-350 FX4 dually. However, you will need to measure to be sure it fits. The distance from the top of your rear axle to the top of the jounce bump stop…

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Answer 6

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 7

Hi Joel! The easiest way to install a brake controller on your 2026 Toyota 4Runner would be to use the Redarc Tow-Pro Elite Brake Controller w/Custom Harness part #RED56CR. It is the same Redarc Tow-Pro brake controller as the RED44FR but has the…

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Answer 8

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Answer 9

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 10

To install a Redarc Tow Pro Liberty in your 2023 Toyota Tacoma Sport you will need the following parts: Redarc Tow-Pro Liberty Brake Controller item #RED24FR Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item #RED99FR…

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Answer 11

Actually, the P3 now has the upgraded axis accelerometer like the P2. The Tekonsha P3 Trailer Brake Controller #90195, will work with both electric over hydraulic brakes on the trailer as well as electric brakes. It has a menu option on the display…

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Answer 12

Hey Dale, thanks for reaching out. For your 2010 Toyota Tundra with the factory tow package, a proportional controller is definitely the way to go for smooth braking on a 2-axle trailer, and a really clean option is the Redarc Tow-Pro Liberty…

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Helper Spring Solution for 2021 Toyota 4Runner Towing 3700 lb Travel Trailer

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