Okay another former owner of the WorkHorse Chassis withe the 8.1l Vortec engine. LOVED IT! It was on a 2004 Southwind and we drove it 8 years and 110,000 miles. Over the Rockies (US AND Canadian) up to Alaska and more bad roads than I care to think about. At around 80,000 miles I blew an exhaust manifold donut, replaced both on the road on the California Coast. ISTR about $200. That was total repair cost on the engine. Maintenance was done faithfully at 3 months even if we hadn't run the mileage, seldom had. Switched to Synthetic after warranty period and also switched to Allison to Transend (sp) at first (only) tranny oil change. You might ask if this was done. Allison recommends it and extends the warranty and change cycle to 150k miles if it is done.
If you want a pdf of the chassis manual, pm me - big download.
