First of all Ironman
Sorry to hear about your problem. But, you came to the right place for answers.
I would suggest that you look in the Spartan Motorhome Chassis Forum & the Cummins Engine forums for these type of questions. They are more brand-specific than the generic Class A Motorhome forum.
Good luck finding your answer.
Mark & Sheila Heilman & The 3 Fur-Ball Princesses - Nikko, Mai-Thai & Andy
'07 MADP 4523, 2012 GMC Terrain SLT 2 wd
Blue Ox Alladin Tow Bar, M&G Engineering Dinghy Braking System