Hardware for Over-Under Conversion on 3-1/2 Inch Axle

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Question:

I am looking for a Over-Under Conversion Kit my tubes are 3.5 DIA and springs are 2 inch wide

asked by: Joe

1

Helpful Expert Reply:

I have a solution for you but there is not a conversion kit for your 3.5 inch diameter axle. You will need to weld on the Spring Seat for Typical 8,000-lb, Round Trailer Axles with 3-1/2" Diameter # TRSS350. Then for the axle hardware you will use the Replacement U-Bolt w/Nuts for 8,000-lb, Round Trailer Axles - 9/16" Diameter # 175666 and the U-Bolt Plate for 3-1/2" Diameter, Round Trailer Axles with 1-3/4" or 2" Wide Springs # 117581.

expert reply by: Jason S

1

Answer 1

Hey Jeff! Yes, the axle can be installed either above the leaf springs or below the leaf springs - it all depends on if the spring seats are located above or below the axle. I see you ordered the Spring Seat #TRSS175 from us recently. Are you having…

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Answer 2

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 3

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 4

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 5

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 6

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 7

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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Answer 8

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 9

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 10

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 11

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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Answer 12

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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Hardware for Over-Under Conversion on 3-1/2 Inch Axle

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