Four-Wheel-Drive Low and Reverse Clutch Housing Spacer Measurement

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Dimension A Of Selective Spacer - 4WD

Courtesy of GENERAL MOTORS CORP.

Position the transmission case so that the rear of the case is facing up.
At dimension A, measure the distance from the rear face of the low and reverse clutch housing (1) to the rear face of the bearing spacer (2).

Fig 2: Illustrating Selective Spacer Dimension B - 4WD

Courtesy of GENERAL MOTORS CORP.

At dimension B, measure the distance from the rear face of the low and reverse clutch housing (3) to the rear face of the retaining ring (4).
Calculate Dimension C by subtracting Dimension B from Dimension A.
Select the appropriate selective spacer (1) based upon Dimension C. Refer to Selective Components Specifications .
Install the selective spacer (1) onto the output shaft (2).