Will Coil SumoSprings Custom Helper Springs Help with 2022 Toyota Highlander Rear Sag

Question

Question:

I have a 2022 Toyota Highlander awd and the rear end sags when I tow my 12’ single axle cargo trailer wells cargo fast trac. In addition to the sumuspring helper springs should I also install new heavier duty shock absorbers?

asked by: Craig R

0

Expert Reply:

Hey Craig, thanks for reaching out!

The Coil SumoSprings Custom Helper Springs # CSS-1145R will help give some extra support to your 2022 Toyota Highlander, but I don't recommend swapping out OEM suspension parts unless they look like they're worn out.

Some other things to check are your weights. Make sure your Highlander isn't being overloaded, and double check that the tongue weight of your trailer is within the recommended 10-15% loaded weight of the trailer for best towing.

Let me know if you have any other questions!

expert reply by: Jon G

0

Jon G.

11/3/2025

Hey Craig, how did things go after adding the Coil SumoSprings to your Highlander? Did they help level out the rear when towing your cargo trailer? Your update could make it easier for others dealing with the same sagging issue.

Answer 1

It sounds like the purpose of getting the air helper spring would be to counteract the 1 inch compression you're getting in your rear suspension caused by the pin weight of your 5th wheel. If that's the case, I believe that the AirLift 5000…

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Answer 2

Hey there Barry, thanks for writing in, and I double-checked with the manufacturer and can verify for you the correct Coil SumoSprings for your 2018 Toyota Highlander 4WD (so long as it is not the hybrid version) are the 1145: - Coil SumoSprings…

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Answer 3

The difference between the Coil SumoSprings Custom Helper Springs for Coil Spring Suspension part #CSS-1145R and part #CSS-1168R is that the CSS-1145R is designed for 4 wheel drive models and the CSS-1168R kit is designed for 2 wheel drive models.…

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Answer 4

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 5

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 6

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 7

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 8

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 9

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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Answer 10

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

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Answer 11

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

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Answer 12

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

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Will Coil SumoSprings Custom Helper Springs Help with 2022 Toyota Highlander Rear Sag

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