Atlas 4 Speed Transfer Case

Through the analysis of other successful transfer case designs, AA has manufactured a rugged, all gear-driven transfer case. Combining the latest in CAD/CAM technology and years of in-house CNC machining capabilities, the Atlas 4spd transfer case is sure to bring you the utmost in dependability and performance. The Atlas 4sp is available for both left and right hand vehicle applications with centered rear differentials. The solid, one-piece case design is manufactured from 356-T6 heat-treated aluminum alloy. This material is also used for the structural access cover and all other exterior components. The massive gears are helical cut and synchro-equipped for quiet performance and "shift-on-the-fly" capability. These gears are supported by needle bearing elements, precision matched to strong 8620 shafts. The ruggedly designed output shafts are amply supported by large taper bearing sets. The Atlas also features a unique twin stick design to deliver crisp, quiet operation. The Atlas transfer case offers you the ability to customize the transfer case to your vehicle. We offer several upgrades, options, and different configurations for this transfer case. Listed on the following pages is all the information to make your custom "made-to-order" Atlas the ultimate gear driven transfer case. CASE: Material: 356-T6 Heat Treated Aluminum Weight: 125 lbs. (dry) INTERNAL COMPONENTS: Gears: Helical Cut Planetary Gears: 6 Gears Helical Cut Bearings: Needle & Taper Rollers Synchronizers: Borg Warner Available Input Shaft Splines: 21, 23, 27, 29, 31, 32, 34 Tail Shaft H.D., 32 Spline, Front Output 32 Spline RATIOS: Low Range: (2.0:1, 2.72:1, & 5.44:1) or (2.72:1, 3.8:1, & 10.34:1) High Range 1:1 LUBRICATION: Quarts: 2.5 Liters: 2.36 LENGTH COMPARISON: *Atlas Short tail 15" NP 231, 20.5" *Atlas Long tail 17" NP241 Rock Trac T/C, 15-1/4" Dana 300, 12"