With its .63 ratio, these Sonnax 2nd gear servo kits are an ideal option when upgrading GM 4L60-E and 4L65-E applications to improve shift feel without risk of harsh 1-2 shifts. They improve 4L60-E and 4L65-E shift feel and durability without harshness. D-Rings used in place of seal rings enhance sealing during apply and release.
Sonnax 2nd gear servo kits include:
* Piston
* Housing
* Piston D-Ring small
* Piston D-Ring large
* Housing O-Ring