Preparing connecting flange on rear axle differential and cardan shaft

Remove seal for cardan shaft either at the connecting flange of the rear cardan shaft or rear axle differential and dispose of it. → see figure below

Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Re-cut all threaded bores in the rear axle differential flange using a thread cutter (finishing tap) without oil and then blow out the bores using compressed air. → see figure below

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information
- Use cotton buds or rolled-up pieces of paper towel soaked in brake cleaner to clean the clearance holes and threaded bores .
- Do not blow out the clearance holes and threaded bores with compressed air again after cleaning them .
Clean flange surfaces as well as through-holes on the cardan shaft and rear axle differential (to remove grease). Any further contamination must be avoided, particularly during assembly.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.