Sly, I posted about my spring breaking in the summer. I called Lippert and got the 4000# springs, heavy duty shackles and wet bolt kit (can order bronze/brass bushings) {your choice as my thinking is to keep the bolts greased} and "U" bolts.
Less than $400.00 but you will need the axle infor for the "U" bolts.

the number and contact is listed there, I paid about $65.00 for the springs not the 95 she asked. (tell here hey are listed on the website for about 35 bucks.
Will raise the trailer about 3/4"

I had a wet bolt sheer on my coach. It wasn't a Lippert wet bolt, it was purchased with the HD shackles through Mor-ryde. It is the reason why I think that wet bolts are not the answer. Anytime that you drill into a bolt you weaken it.

put solid bolts in, have not had a problem since I did this

If the shackle material was thick enough, it could be drilled and tapped towards the center with a grease zerk installed there to apply grease.
Hello Redwood, are you listening??

It’s not my intention to defend Lippert or any inferior product but to those who have had failures had you ACTUALLY weighed your coach fully loaded and prepped for travel. I recently attended an RV Safety Seminar in which they weighed not only each axle but each tire and pin. It’s pretty easy to exceed the cargo capacity of many coaches and get into an over weight situation. The safety presenters had some very alarming statistics about how many rigs are traveling the highways the are severely overweight or on unbalanced loads. Equipment is engineered for specific parameters with little room for exceeding those parameters without failure. Just some food for thought regarding these failures.

Having my rig weighed tire by tire, rather than axle by axle, showed how much heavier the drivers side is because everything heavy is on that side.