I would love to help you upgrade the suspension on your Twilight 2800 travel trailer. The MORryde Rubber Equalizers for Tandem Axle Trailers #MR87ZR that you referenced are a great solution but we do need to double check a few things. First is that…

Since you have a Dometic AC unit the best option to replace it from Advent would be the part #ACDOM135 which was designed for this exact situation and would allow you an easy install since the electronics would plug right in.

The Trailer Hub and Drum Assembly part #AKHD-545-35-K is the correct replacement for an AL-KO 7230. In regards to the braking assemblies, I suggest getting a new pair, the Electric Trailer Brake Kit part #AKEBRK-35-SA. This option will save you…

The amount of bow that's put into trailer axles like the #7359765 is based on about how much a trailer is typically going to weigh that has a 3,500 lb capacity. So there's a bit of approximation and obviously it can't be totally perfect…

According to Lippert, the mounting nuts should be torqued to 120 ft-lbs for the Axle Riser Kit - Single Square Torsion Axle - 3-1/2" Lift #LC382741.

I attached a link to this page that has the install instructions for the Axle Riser Kit #LC382741 that you referenced.

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

We have a great option in a replacement 45 amp power converter for your ELX-45. I suggest the Progressive Dynamics, #PD4045KA. This is a 2-in-1 AC/DC distribution panel and smart charger that works with lithium-ion, flooded lead acid, AGM, and gel…

Dexter Nev-R-Lube Bearings such as the 50MM #31-71-3 referenced in your question do not have a specific maintenance or replacement schedule. These are pre-lubricated at the factory, which will make it resistant to contamination, and sealed for life…

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way…

You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed. To pick out the…

Yes, the Bolt Trailer Hitch Lock part #BL7023582 will work for you as it is a hitch lock designed for 2-1/2 inch hitches like what you have on your GMC 3500 truck. The usable portion of this lock is 3.55 inches. Check out the picture I attached for…