Sonnax

Corvette Ratio Servo Kit

$9.25

SKU: 77701-04K

In Stock
In Stock
Ships by Aug 1
Free Shipping over $100
30 Days Return

Description

The GM Genuine 77701-04K is a 2nd Gear "Corvette" ratio servo kit designed to enhance transmission performance. This kit offers an increased apply area, which translates to improved holding power and firmer shifts. By upgrading to this servo kit, drivers can expect more decisive 1-2 and 3-4 gear changes. The kit features a .74 ratio and is compatible with GM 4L60, 700R4, 4L60E, 4L65E, and 4L70E transmissions. It is noted for its benefit in high-performance build or upgrade packages for these transmissions. The Sonnax 77701-04K is a direct replacement part that aims to optimize the engagement and feel of the transmission gears.

Fitment

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Specifications

BrandSonnax
Part Number77701-04K
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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