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Sonnax SmartShell®Heavy Duty Reaction Shell KitFits: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
Save a bundle here over the cost from a dealership
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