I wonder if a retrofit to the "trunion" type would be any more expensive than changing the ball-joints a couple of times over a 10 year period? Just wondering out loud. I have done mine once and will certainly try some of the home remedies discussed previously before I will have it done again. Interesting looking setup. Happy Trails Bert
2003 American Tradition 40W 350 Cummins
2010 Chev Malibu LT
Perhaps i'm missing something but it is my understanding that the ball joint problem with the older Spartan chassis was due to incorrect rubber being used in the ball joint boot. The ball joints were made by Tuthill. I replaced mine last year and don't expect to have to replace them again. I was told that the new "rubber" boot was intended to last forever.
I really think I could have operated for many more years without changing the ball joints. Upon inspecting the joints after removal, the joints were in good condition, just the rubber boot gone. I had made and installed a rubber boot about 4 years ago and periodically greased the joint with a needle grease fitting.
DRIVE A 2001 NEWMAR DUTCH STAR WITH 330 HP CUMMINS AND TOW A RANGER 4X4. TRAVEL WITH SPOUSE AND PET TINKER BELL OUR CORGIE.