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Vehicle Info NeededSONNAXPART NUMBER: 852-77701-02K
77701-02K 2nd Gear Servo Kit, 4L60/4L60-E/4L65-E/4L70-E
$15973
Ships on 09/14/2026
Lowest Price GuaranteeGM 4L60/4L60-E/4L65-E/4L70-E
- 2nd Gear Servo Kit
- 4L60/4L60-E/4L65-E/4L70-E
- OE Part No. 24230441
Sonnax 77701-02K Features:
With its .63 ratio, Sonnax 2nd Gear servo kit 77701-02K is an ideal option when upgrading GM 4L60, 4L60-E and 4L65-E applications to improve shift feel without risk of harsh 1-2 shifts. These units were originally built with smaller, .46 ratio or V-6, V-8 .55 ratio servos, while the later 4L70-E came with a .63 servo. In all these units, a “Corvette” .74 ratio servo is often too large, aggressive or harsh shifting for stock-type applications, making the Sonnax .63 servo a perfect option for any build.
- Improves 4L60, 4L60-E and 4L65-E shift feel and durability without harshness
- Direct replacement part for 4L70-E
- Upgraded Viton D-rings used in place of seal rings enhance sealing during apply and release.
- Compatible with Sonnax 4th Gear super hold dual servo kit 77767K.
- Piston
- Housing
- Piston D-Ring Small
- Piston D-Ring Large
- Housing O-Ring
Contains:
High-Performance Servos, Servo Kits, and Components to Meet the Toughest Transmission Challenges
Sonnax servos progressively increase band force as line pressure increases and are the perfect upgrade for more holding power without excessively harsh shifts.
Part TypeAutomatic Transmission Servo Piston
Product LineSonnax Servo Kit and Components
BrandSONNAX
Package Height2.35
Package Width4.35
Package Length4.8
Weight0.77 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
