Product Description
700 700R4 4L60 4L60E 4L65E 4L70E New Heavy Duty Sonnax Smartshell™ 77749-02K Kit.
This Is A New Sonnax Smartshell™ For These Automatic Transmissions,
- 700R4 1982-ON
- 4L60 1987-1993
- 4L60E 1993-ON
- 4L65E
- 4L70E
This Listing Comes With:
The Smartshell Kit Contains:
One Sonnax Smartshell™ Kit
Part Number# 77749-02k
• Heavy Duty Reaction Shell
• Four-tab Enclosed Thrust Bearing
• Custom Roller Clutch Race
Part Summery
Stripped Or Cracked Shells In Gm 4l60, 4l60-e, 4l65-e And 4l70-e Units Are A Common Problem, But Strengthening The Shell Alone Does Nothing To Address The Equally Common Problem Of A Failed Rear Planet Captured Bearing.
The Sonnax Smartshell 77749-02k Is A Heavy Duty Reaction Shell Kit Designed To Prevent Damage To The Rear Planetary Assembly As Well As Provide A Reinforced Shell.
Protecting The Planetary Bearing
In The Oe Sun Gear Shell, The Thrust Load Passes From The Shell Through The Sun Gear, Then Overloads The Small Captured Planetary Bearing. To Protect This Bearing, Sonnax Took The Smart Approach And Replaced The Oe Black Plastic Washer
With A Large Thrust Bearing And Roller Clutch Race. This Re-routes The Thrust Load Directly To The Carrier, Completely Bypassing The Delicate Bearing.
Strengthening The Shell
The Smartshell Avoids The Substantially Increased Weight Found In Other Aftermarket Shells. The Sonnax Approach To Improving The Shell Includes Reinforcing The Hub Area With An Electron-beam Welded Collar. A Final Machining Process After
Welding Ensures Precision Alignment. The Smartshell Splines Undergo An Advanced Machining And Heat-treating Process, And The Lugs Which Engage The Drum Are Heat Treated As Well To Avoid Flaring.
This Is A Great Shell For The Money And Is A Lot Stronger Then Oem.
