Case Assembly Inspection

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Inspecting Spacer Plate To Case Gasket For Witness Marks

Courtesy of GENERAL MOTORS CORP.

Inspect the spacer plate to case gasket for witness marks. The witness marks should be complete. Incomplete witness marks may come from an uneven case surface or from cross channel leaks.

Fig 2: Identifying Case Fluid Passages

Courtesy of GENERAL MOTORS CORP.

Using compressed air, blow into all of the case fluid passages (3, 7, 8, 11, 16, 18, 26, 29, 37, 45) to ensure that all case fluid passages are clear of any obstruction.

Fig 3: Inspecting Case Assembly Components For Damage

Courtesy of GENERAL MOTORS CORP.

Inspect the 2-4 servo bore, the 3rd accumulator retainer and ball assembly (40), the orifice cup plug (11) in the servo bore, and the 2nd apply piston pin bore for any of the following conditions:
- Porosity
- Burrs
- Debris
- Any other damage

Fig 4: Locating Orifice Cup Plug

Courtesy of GENERAL MOTORS CORP.

Inspect the 3-4 accumulator bore and the orifice cup plug (38) for any of the following conditions:
- Porosity
- Burrs
- Blockage
- Any other damage
Inspect all bolt holes for thread damage. Use heli-coil to repair damaged threads.
Inspect the cooler connectors for damage and proper torque.
Specification: Cooler connector torque should be 38 N.m (28 lb ft)