Recommended Suspension Upgrade for a 2021 Ram ProMaster 3500

Question

Question:

I have a promaster 3500 and on a camper build out I was going to put air lift 5000 on rear can and should I use the coil spring helpers on front?

asked by: Ken H

1

Helpful Expert Reply:

Yes, you should add the Coil SumoSprings Custom Helper Springs for Coil Spring Suspension item # CSS-1195F to the front suspension on your 2021 Ram ProMaster 3500. These helper springs adjusts progressively to the weight of your load. I have linked a review video below.

As far as your air lift system goes for the rear end, I recommend the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers item # AL88233. This system includes a jounce bumper that will stop your air bags from completely deflating when your ProMaster is sitting idle for a few days. If the air bags completely deflate it will cause damage to the brackets when they come into contact. The jounce's keep the air bags from completely compressing.

I also recommend the Air Lift WirelessAIR Compressor System for Air Helper Springs item # AL74000EZ. Air Lift's premium, wireless, onboard compressor system with Bluetooth allows you to fill your air springs at the touch of a button. The WirelessAIR also automatically maintains pre-set air pressure levels. It lets you adjust two air springs independently with the wireless remote control. This allows you to level your ProMaster front to back. It also allows you to get side-to-side leveling of off-center loads by inflating each spring with a different amount of air.

expert reply by: Jerred H

1

Answer 1

For your 2018 Ram ProMaster 2500 the SumoSprings rear suspension kit you'll need is the part #SSR-313-54. This has the most support at 2,800 lbs which will be ideal since you will be converting your setup to a camper. I'd first try it with…

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Answer 2

Sumo Springs are a great solution that are easy to install and don't require any type of maintenance once they're on. I recommend using the SumoSprings Solo Custom Helper Springs #SSR-313-47 because of the springs compress easily at first for…

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Answer 3

Since you want comfort over additional capacity you'd want the lighter duty #SSR-313-40 since it wouldn't be as harsh.

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Answer 4

Since there isn't a 2017 Winnebago Trend 23C most likely you have the 23D which for a suspension enhancement kit you'd want the SumoSpring kit part #SSR-313-54 which will give the rear suspension more support and will also do a great job…

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Answer 5

All three SumoSprings kits fit your 2018 Ram Promaster 3500. The difference is the capacity of each. The #SSR-313-54 is the highest rated at 2,800 lbs, the part #SSR-313-47 is 1,500 lbs, and the #SSR-313-40 is 1,000 lbs. Due to the weight of your…

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Answer 6

Since you are loading your 2018 Ram ProMaster 2500 up to the GVWR I recommend starting off using the SumoSprings Solo Custom Helper Springs #SSR-313-54 for the rear axle. These are the heaviest duty option available which is what you need for your…

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Answer 7

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 8

For your 2021 Promaster 1500 Winnebago Solis Pocket the SumoSprings kit part #SSR-313-54 would be a great option for rear suspension enhancement that is confirmed as a fit and would provide up to 2,800 lbs of additional suspension support.

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Answer 9

Assuming that your RV doesn't already have one, an anti-sway bar like #RM-1129-143 will keep your rear axle tied perpendicular to the frame which will be the most effective way to prevent the front end from getting squirrely on you. However, this…

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Answer 10

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 11

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 12

The Hellwig Adjustable Big Wig Rear Anti-Sway Bar #HE94FR is only going to leave a few inches between it and the spare tire, as you can see in the attached picture. Depending on how far forward you have the tire it could potentially interfere with…

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