2011 Interim Model Year Design Change - NQF/NQG HD and SHD Design Change - Main shaft, pin, and thrust washer
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Beginning in 2011 model year for NQF/NQG HD and SHD applications, an anti-rotation main-shaft pin (2) was added to the design as well as a design change to thrust washer (11). The new design is to prohibit the rotation of the thrust washer (11). Components of this design are not to be used for back service.