TSB:   DT–2005-12-08 Date: 10/21/2005 Subject:  Automotive Differential and Manual Transmission Oil Drain and Flushing Procedures Technical Service Bulletin OBJECTIVE: To describe the correct differential and manual transmis- sion oil change procedures for  synthetic gear lubes. ISSUES: The use of improper flushing procedures can cause short- ened oil drain intervals and contamination, increased wear and foaming.  By using proper flushing procedures with synthetic gear lubes, maximum gear bearing and [...]