The Western Star 6900 XD 40-ton dump is designed to minimize cost ton of material hauled and maximize shift productivity through efficient fuel consumption, fast cycle times and superior operator comfort. Key specifications include 110,000 pound planeteary drive axles, a Detroit Diesel Series 60 engine with Tier 3 off-highway emission ratings, a fully automatic Allison 4500 RDS transmission, and purpose built dump box. With this configuration, the truck is a cost effective, turnkey solution for mining and quarry customers. Up to 35 percent more fuel efficient than traditional off-road haulers when haul distances exceed one mile. The superior fuel economy, combined with stable loaded top speeds of more than 40 miles per hour in the proper application, makes this truck unmatched in cycle time efficiency.