[sourdough]

I agree that it sounds like you are probably overloaded in some respect. I don't know what stage you are at with those axles but if you haven't paid for them yet you might look into Performance Trailer Braking. They can replace any of your suspension components plus adding disc brakes. I had them add 7k axles and new 7k springs, HD shackles/wet bolts, removed Road Armor suspension and put on MorRyde LRE4000 suspension, disc brakes, Xfactor cross braces etc. Came to my house to do the work and had it done in a day. Good people to work with.

If you are going to upgrade your axles you need to upgrade the springs to match. If you are going to do that it makes no sense not to upgrade the rest of the suspension while at it. As in anything else upgrading one item then leaves you at the mercy of the next weakest link so adding new, upgraded heavier axles without the corresponding springs is almost pointless.