Reaction Carrier Pinion End Play
WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
End play specifications are the same for both the 4-pinion reaction carrier (651) and the 5-pinion reaction carrier (651A).
Using a feeler gage, measure the pinion washer wear.
End Play Specifications: The correct end play is between 0.228-0.610 mm (0.009-0.024 in).