Parts Needed to Add Electric Brakes to Single 3,500 lb Utility Trailer Axle

Question

Question:

I am trying to put electric brakes on my utility trailer that has a single 3500 Lb axile. It never had brakes. I understand the parts needed for mounting on the axile but am clueless about the electronic aspect. I have a factory installed brake controller in my 2021 Nissan Titan XD. If I wire a seven pin connector to the brakes and my lights will the system work without any other controllers? If not what do I need?

asked by: Robert M

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Expert Reply:

If your 2021 Nissan Titan XD doesn't already have a 7-Way then you need to install the Hopkins # N40975. This gives you everything you need for your brake controller and to control the trailer lights.

Then to add brakes and a 7-Way setup on your 3,500 lb utility trailer axle you need the following parts:

- Brake Mounting Flange # 4-35 (if axle doesn't already have this on either side)
- Self-Adjusting Electric Trailer Brake Kit # AKEBRK-35-SA
- Brake Mounting Hardware # BRKH10B
- Hub and Drum Assembly (5 on 4-1/2" bolt pattern) # AKHD-545-35-EZ-K
- Hub and Drum Assembly (6 on 5-1/2" bolt pattern) # AKHD-655-35-EZ-K
- Breakaway Battery Kit # 3802308
- Junction Box # 3430001-JBK
- 7-Way Molded Trailer Wire Connector # H20043
- 10 Gauge Wire (sold by the foot) # 10-1-1
- Butt Connectors # DW05745-10

I'm also attaching a helpful article on parts needed to add electric trailer brakes for you to check out. The brake kit comes with both the left and right brake assembly but you need to purchase 2 of the flange mount brackets as well as hub and drum assembly. When it comes to the 10 gauge wiring you need enough to run from the location of the junction box back to one of the brake assemblies and then across your axle to the other brake assembly. I recommend getting a few extra feet of this wire just to make sure you have more than enough to route it away from hot or moving parts underneath your trailer.

expert reply by: Jon G

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Answer 1

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 2

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 3

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 4

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 5

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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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

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 8

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 9

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 10

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

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Answer 11

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 12

The torque for the Dexter Trailer Hub and Drum Assembly - 6,000-lb and 7,000-lb Axles - 12" - 5 Spoke Utility #8-174-5UC3 is not specified by the manufacturer. For 9/16 inch studs, the typical lug nut torque will be 120-140 ft lbs based on most…

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