High/Low Planetary Carrier Assembly
WARNING: This page is about a different car, the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The first design light duty 3-pinion (1) and heavy duty 5-pinion (2) high/low planetary carriers can be identified as having a 30 tooth design with an inside diameter (a or b) of 61.3 mm (2.41 in).
The second design light duty 3-pinion (4) and heavy duty 6-pinion (3) high/low planetary carriers can be identified as having a 29 tooth design with an inside diameter (c or d) of 60.2 mm (2.37 in).