For 1990-2009 cars

1. Clean the rear extension housing in a suitable solvent. Air dry the housing.
2. Inspect the extension housing for the following:

• | Cracks

• | Scratches

• | Damaged threads

• | Burrs

• | Nicked mounting surfaces

• | Damaged sealing surfaces

• | Damaged front or rear bearing bores

3. If damaged beyond repair replace the extension housing..
4. Clean up damaged threads with the correct size thread tap.
5. Inspect the machined mating surfaces for flatness (Check the mating surfaces with a straight edge).
6. Use a fine mill file to dress minor scratches or burrs.