P1 Planetary Gear Inspection

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, 2003 Chevrolet Cab & Chassis Silverado, and 2002 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Clutch plate movement can cause notching on external splines of P1 planetary ring gear.

Measure any notching on external splines of P1 planetary ring gear (dimension "A"). See Figure and Fig 1 . Compare measurements to specifications. See MAIN HOUSING MODULE SPECIFICATIONS table under TRANSMISSION SPECIFICATIONS. Replace P1 planetary gear if it does not meet specifications.

Fig 1: Measuring Planetary Ring Gear (P1 Shown; P2 & P3 Are Similar)

Courtesy of GENERAL MOTORS CORP.