Product Description
700 700R4 4L60 4L60E 4L65E 4L70E New Sonnax 77701-076 Servo Release "Check Valve".
This Listing Is For:
(1) One Sonnax 77701-076 Check Valve Kit Only
Transmission Case Is Not Included!!!!!
This Check Valve Will Fit These Automatic Transmissions;
GMC Chevy Buick Cadillac Pontiac Oldsmobile
700R4 1982-on
4L60 1987-1993
4L60E 1993-on
4L65E 2001-on
4L70E
Note: This "Check Valve Must Be Used With The OEM Valve And Some Drilling May Be Needed.
Complaint;
Reduced 3-4 Clutch Life
Secondary Complaints
• Poor 2-3 Shift Feel
• 3-2 Tie-up
Cause:
Inadequate Metering Of The 2nd Band Servo Release Oil.
Correction:
This Part Combines An Orifice With A Ball Check Valve To Meter Servo Release Oil.
Sonnax Part Summary
Technicians Would Like To Find A Way To Successfully Extend The Life Of 3-4 Clutches, And Improve The 2-3 Shift Feel. They Have Been Trying, With Limited Success,
Since The 700-R4 Transmission Was First Introduced.
Inadequate Metering Of 2nd Gear Band Servo Release Oil Causes 3-4 Clutch Failure. The 3-4 Clutch And 2nd Gear Band Are Not Properly Synchronized.
Sonnax Has Now Developed A Unique Solution That Combines An Orifice With A Ball Check Valve And Solves These Problems.
Features & Benefits
• Improved Design Meters Servo Release Oil, Reducing 3-4 Clutch Failure.
• Provides Sufficient Exhaust So That 3-2 Downshifts Are Smooth.
• Calibrates 3-4 Clutch Feed Orifice Without Creating Shift Concerns.
Please Make Sure Of Your Year Before Ordering, Any Questions Please Call 1-888-8CT-POWR (1-888-828-7697)
