66627 POSI 10.5 GM INTERNAL KIT EATON # 66627 30 SPLINE

Fits the following:

GM C2500 1972-2020

GM K2500 1972-2020

GM C3500 1972-2020

GM K3500 1972-2020

GM G30 van 1997-2020

GM G35 van 1997-2020

GM Savana van 2009-2021

GM Express van 2009-2021

GM 10.5″ rear differential

Note: Has a 6 bolt retainer to support the pinion, 14 bolt cover, pinion is removed through the front of the differential