4L60 4L60E 4L65E 4L70E 700R4
Sonnax Smart Shell Sun Gear Shell.
This is a heavy duty upgrade for these transmission applications.
This item includes
Heavy Duty Reaction Shell
Four-Tab Enclosed Thrust Bearing
Custom Roller Clutch Race
The Sonnax SmartShell is a heavy duty reaction shell kit
designed to prevent damage to the rear planetary assembly.
The reinforced shell is designed to withstand torque load.
Thrust load passes to the carrier from the shell through the large bearing
and race, bypassing the small planetary bearing.