I am finding that our Sienna is riding too low at the rear when we are loaded for camping trips. We have a 2inch trailer hitch which we use for a Thule hitch type cargo box and we also carry a canoe on top as well as lots of camping gear inside. Unloaded the hitch has 8.5inch of road clearance but goes down more when loaded. I would like to have the same clearance or even an inch or 2 more when we are loaded. Will the CSS-1168R Helper springs do this for me? Can I use 2 pairs of these if necessary ie. 2 helper springs on each side? Another option is the Airlift 1000 system, but I kind of prefer having no air lines etc. Please let me know how much lift could be expected from each system. Thank you!
asked by: Doug E
The SumoSprings # CSS-1168R that you referenced will install between the coils of your springs as shown in the photo I provided. They will make the springs harder to compress, but will not provide additional ground clearance. This is a passive system, that will allow no adjustment. The folks at SumoSprings do not recommend using more than one set of springs per axle, as additional springs would make for a harsh ride.
In your situation, even though the idea of having air lines does not thrill you to death, I truly believe you would be happier with an air bag system like the like the Air Lift # AL60732. This system can be pressurized from 5 to 35 psi, allowing adjustment options according to your needs. The system will not offer additional clearance, but it will prevent the rear of the vehicle from squatting, preserving the ground clearance you already have.
An on-board compressor system, part # AL25592 is available that would allow you to adjust the air pressure without having to leave the vehicle. We also highly recommend using a tubing cutter, part # AL10530. It is essential that the cuts in the tubing are perfectly square, in order to prevent leakage.
I have linked you to the installation details for the SumoSpring system, the Air Lift system and the compressor.
expert reply by: Mike L
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Products Referenced in This Question
Rear Axle Suspension
Suspension Enhancement Kit
Product Page this Question was Asked From
Rear Axle Suspension