Sonnax turbine hub GM-HT-56HS is a direct replacement for worn or damaged hubs in listed GM converters.
GM 6L90 (captive clutch) converters are known to have two versions of turbine hub. Check the end of the hub towards the stator to determine if you need GM-HT-56HS with the stepped, chamfered nose or GM-HT-49HS with the chamfered nose.
Internal Spline Tooth Count: 36
External Spline Tooth Count: 55
Existing Customers: Contact your sales representative.