Result: tandem axle suspension kit

You want leaf spring shackles to be at a slight angle as that prevents the springs from flipping around to the other side of the equalizer over uneven terrain. I attached a picture that shows what the angle is typically like.

In order for your trailer suspension to function properly you will want the angle of the shackle strap to be towards the axle so that as the leaf spring compresses and expands it will have somewhere it can go. Otherwise, you will not get the optimum…

You'd have to go with a brake mounting flange designed for a round axle since we don't have any specifically for square axles. Most likely some modifications will need to be made but since only people with experience installing brake flanges…

The height of your equalizer is measured from the center of the horizontal mounting holes, to the center of the upper mounting hole as shown as the 2" measurement in the included diagram of the #TREQ104. If you can send me this measurement, and…

The first thing to do is verify that the the disc brake calipers and wheel bearings will fit your trailer. The majority of 3,500 lb axles use #L68149 inner, #L44649 outer bearings and the #RG06-050 grease seals, but you should check to be sure. Next,…

Leaf springs typically have the part #stamped on the strap that holds the leafs together at one end of the shorter leafs, or it is painted on the concave side of the springs. The part number can then be used to determine the capacity of the springs.…

The bolt pattern for a 5 bolt brake mounting flange, like #4-44-1 is 5 on 3-7/8 inches. What that means is it measures 3-7/8 inches from one corner to its diagonal counterpart. From hole to hole across the bottom is 3 inches and between the others is…

You will want to choose the diameter size of U-Bolts you need by the axle type (round, square) and the axle diameter. The Redline 2 Inch Square Trailer U-Bolt, part #SP01-160, you have referenced is for a 2 inch square axle. It is a 9/16 inch…

If you used the Dexter Equalizer kit part #K71-359-00 that you referenced the distance between the axles would be 33 inches.

Domestic trailers have a 2-wire system where there is a circuit for the running lights and a circuit for the brake lights and turn signals; our trailer connectors are not configured for a separate brake circuit. You can separate those by using…

If the spring seat dimension on the axle does not match up the suspension won't work properly as it will be bound up instead of able to move freely. This also would cause premature failure of the components as well so I'd have to recommend…

On this page (typically below the product links) there is a helpful link section that will have the install instructions fo the Hopkins Breakaway kit part #20400 that you referenced. I also attached an install video that shows the kit installed as…