NP246 OEM Quality Replacement Transfer Case Fits 2003-2007 GM Trucks with RPO Code NP8 and 4L60E Transmission (27 spline input) New Heavy Duty Aluminum Rear Case Installed No Upfront Core Charge 18 Month Unlimited Mileage Parts Only Coverage Against Manufacturer Defects NP246 OEM Quality Transfer Case. Remanufactured Bulldog Tough from The Gear Shop! This is the NP8 unit that fits GM trucks 2003-2007 with a 4L60E transmission. This unit has the splined shift selector and 27 spline input shaft. All units come with a new upgraded, heavy duty aluminum rear case to resolve the "pump rub" issue common to these units. This unit has been remanufactured by The Gear Shop in the USA to exceed OEM standards. This product is covered against manufacturer defects for 18 months. This transfer case is being sold on an exchange basis. Product protection coverage does NOT begin until we have received your old transfer case as the core exchange. The Gear Shop pays for the core return with a supplied label to use. We are available to answer any questions about the core return process that you may have.