MP1222G-1 Manual Shift Transfer Case

The Zumbrota Drivetrain RTC1222G-1 is a professionally remanufactured MP1222 manual shift transfer case, meticulously built to exacting standards for reliability and performance. This unit is specifically designed for 2007-2013 GM Sierra and Silverado 1500 models that utilize the 4L60E transmission and feature manual shifting, with Option Code NQG. Each Zumbrota transfer case undergoes a rigorous remanufacturing process. This includes thorough inspection and testing of all cases and internal components for signs of wear such as cracks, stripped threads, shaft straightness, gear wear, and chain stretch. Zumbrota employs a proprietary Hydro-blast rinse and blasting procedure, followed by a deep cleaning process. All units are fully rebuilt with the replacement of essential components including all bearings, seals, and viscous couplers. Prior to shipping, each transfer case is spun tested to ensure proper shiftability and to detect any noise issues. Units are then shipped in high-density plastic totes to prevent transit damage. Key specifications for this transfer case include a 27-spline input and a 32-spline output, with a Hollander number of 412-665. The product is compatible with manual shift configurations (Option Code NQG).