Suspension Enhancement Options for 2021 Salem FSX 178BHSKX With Single Underslung Axle

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Question:

I have a 2021 Salem FSX 178BHSKX single axle with Dexter 4400# underslung leafs under the axle suspension. I was looking at the TSS-106-40 Sumo Spring kit but only have about 5.5 inches from the frame rail to the top of the leaf spring. If I do not use any spacers will I be able to use this SS kit? I do have Sumos on my Nissan Frontier and they work great for reducing squat when I tow. Im hoping this kit will helps smooth out the ride and reduce suspension wear since the 4400 axle is right at the top of the weight rating for this camper.

asked by: Rick G

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Expert Reply:

According to SumoSprings, 6" is the minimum for the # TSS-106-40. I asked them about this and they said you cannot use these if the space is under 6" so unfortunately they won't work for you. Doing so will overload the springs which can cause damage to the trailer and make the ride bouncy instead of smooth.

With that amount of space and the single axle you're pretty limited on options for suspension enhancement. If you really want to use the SumoSprings you could cut off your existing hangers and weld on taller hangers so you have more space. Another option would be the Timbren # T92MR. However, this is 5-1/4" tall so it will barely fit. Timbren springs are also pretty stiff so I don't think you will be happy with the end result.

The other option I have would be to flip the axle so it is overslung and then add shocks. You could try to measure to see if the # TSS-107-40 would fit after flipping the axle. More than likely it won't since the underslung springs wouldn't. You would need to choose the correct kit based on your axle diameter. More than likely it is 2-3/8" and you need the # K71-384-00 but if it is 3" you need # K71-385-00 instead. Keep in mind, this will also raise your trailer by the diameter of the axle plus the height of your leaf spring stack.

Once the axle is flipped, you can use the Lippert Bolt-On Shock Kit. Once again you will need to choose the correct kit based on axle diameter. If you have a 2-3/8" axle you need # LC281255 and for a 3" axle # LC281281. This will help smooth out your ride for a better towing experience.

expert reply by: Robin H

0

Top of Leaf Spring to Frame Measurement on 2021 Salem FSX 178BHSKX
(click to enlarge)

Answer 1

It sounds like you are looking for the Dexstar Steel Mini Mod Trailer Wheel part #AM20436 which matches all the specs in the photo you attached. The manufacturers part number for this wheel is also 017-231.

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Answer 2

Based on what you are saying and your photos, it apprears you have springs that are double eye springs. The springs will need to be based on the load of your trailer. The axle capacity may be difficult to know as you said it appears to be custom. I…

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Answer 3

The 3 LED Identification Light Kit for Trailers #MCL22RK3B have a 3 wire connection. This is because they are intended to be used as running lights and to light up brighter as brake lights. Because trailers use combined wiring, meaning the brake and…

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Answer 4

The TSS-105-40 is no longer available from SuperSprings. You are going to need their current SumoSprings Trailer Helper Springs #TSS-106-40 for your Coachmen Apex Nano 193BHS. This kit is designed for underslung axles with a capacity between 3,000lbs…

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Answer 5

In regards to grease compatibility brand is not really relevant but rather the base of the grease. The majority of hub/bearing greases will have a petroleum/polyurea-base so the Prime Guard Wheel Bearing Hi-Temp Red Grease part #L11380 for the can or…

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Answer 6

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 7

There are many options out there. LubriMatic Disc/Drum Brake and Wheel Bearing Grease #L11465 is a great one. You can use it on disc or drum brakes. It can also be used to grease wheel bearings.

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Answer 8

To adjust the brakes, you will need to raise the trailer and secure it on adequate capacity jack stands. Check that the wheel and drum rotate freely. Do not lift or support trailer on any part of the axle or the suspension system. Remove the…

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Answer 9

The LubriMatic Wheel Bearing Grease for Disc and Drum Brake Applications part #L11465 has a petroleum base so as long as the grease you are wanting to mix this with also has a petroleum base there should not be any issues. If it uses any other base…

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Answer 10

The brake spoon part #W80630 that you referenced is designed to adjust the tightness of brake assemblies so that they operate as they should. As long as you have drum brakes on the axle you are referring to this product should work well for you.…

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Answer 11

I checked your order notes and the leaf springs you bought last year were the part #e28SR which are for 5k axles. Since this is over the capacity of your axle failure would not have been caused by over loading the trailer assuming you stayed under…

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Answer 12

The Dometic Ultra Breeze Trailer Roof Vent Cover part #DMC38FR installs using brackets which secure to the vent lid flange. The brackets are screwed into the roof but the cover is attached to the bracket using pins and is easily removeable. I have…

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Suspension Enhancement Options for 2021 Salem FSX 178BHSKX With Single Underslung Axle

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