MP1625/MP1626 Transfer Cases

Nine remanufactured transfer cases are listed in this category, all for GM Sierra and Silverado 2500 and 3500 trucks. Note the naming: every unit here is titled MP1626, while the model number field on most reads MP1625/MP1626. All nine are electric shift and all nine carry Option Code NQF. Listed vendor SKUs run RTC1626G-1 through RTC1626G-4, with an M suffix where a new shift motor is included.

What fits what

The 2007-2010 Sierra and Silverado 2500/3500 unit is RTC1626G-1, and RTC1626G-1M with a new shift motor. The 2011-2019 6.0L Gas unit is RTC1626G-2 and RTC1626G-2M. The 2011-2015 6.6L Dsl unit is RTC1626G-3 and RTC1626G-3M. The 2015-2019 6.6L Dsl unit is RTC1626G-4, listed without a shift motor. Two further units cover 20-22 Sierra and Silverado 2500/3500, one 6.6L Gas and one 6.6L Dsl, both without a shift motor.

How to identify yours

Four checks will get you there. Input spline count: 29 Spline Input Shaft on the 2007-2010 units, the 6.0L Gas units and the 20-22 6.6L Gas unit; 33 Spline Input Shaft on all three 6.6L Dsl listings. Mounting pattern: Round Mounting Pattern on the 2007-2010 units, Oval Mounting Pattern on the 2011-2019 units, 8 Bolt Oval on the 20-22 gas unit and 12 Bolt Oval on the 20-22 diesel. Speed sensor: Screw in Speed Sensor on most, Bolt in Speed Sensor on the 2015-2019 6.6L Dsl, and No Speed Sensor on both 20-22 units. Then whether you need the shift motor.

Then confirm against the numbers. Hollander 412-668, 412-669 and 412-741 with UMT141-6 and UMT141-9 cover the 2007-2010 units. Hollander 412-754 covers the 6.0L Gas units. Hollander 412-757 with UMT141-10 covers the 2011-2015 6.6L Dsl. The 20-22 units are Hollander 412-10225 for the gas and 412-10229 for the diesel. The 2015-2019 6.6L Dsl listing carries no tag or Hollander number in our data, so match it on year, engine and the bolt in speed sensor, or call.

Core charge and warranty

Remanufactured exchange units. A refundable core charge may apply; no core amount is published, so call for it. A 6-month limited warranty is standard, and a 7-year / 1,000,000-mile extended warranty and a core fee waiver are available on request for qualifying remanufactured units, arranged at the time of purchase and not automatic. See the remanufacturing process and the warranty page. Call 216-250-6666 with your tag number.