Sonnax Smart Sun Shell 77749-02K 4L60E 700R4 4L65E 4L70E SmartShell (99930)*

Description

Sonnax SmartShell®
Heavy Duty Reaction Shell Kit
Fits:
4L60 / 4L60E / 4L65E / 4L70E
Includes:
Heavy Duty Reaction Shell
Enclosed Thrust Bearing
Custom Roller Clutch Race
In GM 4L60, 4L60-E, 4L65-E and 4L70-E units, bulky aftermarket shells always fall short when splines continue to strip and the shells break under stress.
A chronic problem with both OE and thicker aftermarket shells is failure of the rear planetary bearing.
From daily jobs to extreme builds, the Sonnax SmartShell heavy-duty reaction shell kit 77749-02K is the only way to prevent shell failure AND protect the bearing.
The SmartShell avoids the weight found in traditional, heavy-duty aftermarket shells thanks to a unique combination of improved design and manufacturing for a super strength shell
that's only slightly bulkier than OE.
To prevent thrust loads from overwhelming the captured planetary bearing, the SmartShell features a larger bearing and custom roller clutch race.
These parts re-route thrust loads through the carrier, completely bypassing the delicate bearing.
Stops spline stripping
Prevents hub breakage
Eliminates planetary bearing failure
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