Background
The automatic transmission used on Saab 9000 is the ZF 4HP18
Symptoms
Slipping when starting to drive
Shifting at random times
Not downshifting
The car doesn’t start moving when you select “D” but does if you manually select “1”
Manuals, Parts Diagrams, and Technical Info
Transmission Technical Service Information
Eriksson Industries Parts Diagram
Automatic Choice Parts Diagram
Townsend Imports - Saab Service Bulletin
Repair Procedure Write-Ups
https://www.saablink.net/threads/governor-seal-replace-diy.51033/
https://www.saabscene.com/threads/my-thoughts-on-governor-seal-replacement.135245/
https://www.saabcentral.com/threads/auto-tranny-in-9000s-are-not-reliable.200366/
YouTube Videos
