179 Axle Issues

I had an Aliner with the "off road package"- same deal, different angle arms and 14 rather than 13 in tires/wheels.     Just about any normal RV would literally come apart in short order if you did any real offroading despite the clearance

Check this out for offroad RV'ing-
https://www.youtube.com/watch?v=wk6KJXeOM0k

Don't know why my 179 is having issues-  but since I leave soon on an extended trip and don't have time to have a dealer look at it etc..
I just got back from visiting the local Dexter distributor and have a 5000 lb rated axle on the way and 2ea 15x6 rims to mount my tires I already have. 
His Dexter contact promised the axles will ship on 7/28 and will be here by 7/31!   So that gives me enough time to do all the work and hit the road as scheduled-  I'll deal with whoever, Dexter or FR, when I get back.
I also spec'd the axle to have a 10deg down arm instead of 0, that will raise the trailer a couple of inches, which I wanted to do anyway, and give enough clearance for the larger tires in the fenders.

The 15" tires will have a total rating of 5,080 lbs instead of just 3,520.  The trailer will never be loaded anywhere near that of course but I like overkill when it comes to tires

I would think, if you have decided to buy a new axle, and already know a modification might be needed, you should buy whichever brand best fits your needs, regardless of brand. Get the one that doesn't require you to buy new wheels and tires.

I forgot I have two brand new 225/15 Goodyear Marathon radial trailer tires made in 2011.  So they are still within the recommended age limit. 
I also forgot my 1999 toy hauler has 6 lug 15" tires and rims....that's what the Marathons were bought for..  Since the toy hauler hasn't moved in years I will use those tires and rims to get this project going at lower cost- if I can get the axle in time.

So I'm waiting on a quote to come in but looks like a new axle will be around $600- as said, the question is how quick can I get it...  
Dexter has an axle plant in Georgia I'd be willing to drive to in order to pick up the axle, if that is allowed, as otherwise it will have to ship freight which can be slow.
I hope to be on the road heading out west in just over 2 weeks so time is a big issue.
If I can't get an axle in time I will swap two 15" 5 lug tires and rims from my enclosed trailer to the rpod, to go on this trip- that way the tires will be within their weight rating even if the axle is not.
That would add some comfort factor back in.

     Budward our Vibe has a 4,400 lb. axle and 15" tires with 5 lug nuts. It would be expensive to change everything axle and wheels I know there are those that have done it with their Vibe. That's why I would recommend having it checked by a RV technician to see if it is defective and have it replaced under warranty.