G56 M/T 5TH & 6TH Gear Countershaft . 5th & 6th Gear Countershaft G56 5.9L Diesel / 5.7L GAS Cluster Gear Tooth Count: 45T-52T Features and Benefits: 5th & 6th Gear Countershaft G56 5.9L Diesel / 5.7L GAS Cluster Gear Tooth Count: 45T-52T Details: AAP UDA 4: 55 Application Summary: 2011-2018 Ram 2500 (Liter: 5.7 & Engine(ci): 345 & Cylinder: 8 & Block: V & Bore(in): 3.92 & Bore(mm): 99.57 & Stroke(in): 3.58 & Stroke(mm): 90.93 & Transmission Code: G56 / Note: 5th - 6th Counter Shaft Gear, 48 Tooth 5th - 52 Tooth 6th) 2011-2018 Ram 3500 (Liter: 5.7 & Engine(ci): 345 & Cylinder: 8 & Block: V & Bore(in): 3.92 & Bore(mm): 99.57 & Stroke(in): 3.58 & Stroke(mm): 90.93 & Transmission Code: G56 / Note: 5th - 6th Counter Shaft Gear, 48 Tooth 5th - 52 Tooth 6th) 2005-2010 Dodge Ram 2500 (Liter: 5.7, 5.9 & Engine(ci): 345, 359 & Cylinder: 8, 6 & Block: V, L & Bore(in): 3.92, 4.02 & Bore(mm): 99.57, 102.0 & Stroke(in): 3.58, 4.72 & Stroke(mm): 90.93, 120.0 & Transmission Code: G56 / Note: 5th - 6th Counter Shaft Gear, 48 Tooth 5th - 52 Tooth 6th) 2005-2009 Dodge Ram 3500 (Liter: 5.7, 5.9 & Engine(ci): 345, 359 & Cylinder: 8, 6 & Block: V, L & Bore(in): 3.92, 4.02 & Bore(mm): 99.57, 102.0 & Stroke(in): 3.58, 4.72 & Stroke(mm): 90.93, 120.0 & Transmission Code: G56 / Note: 5th - 6th Counter Shaft Gear, 48 Tooth 5th - 52 Tooth 6th)