4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up

Description

⚡ Elevate your GM transmission game with unstoppable 4th gear grip!

The Sonnax 4th Gear Super Hold Dual Servo Kit (77767K) is engineered to boost the holding power of GM 4L60 series transmissions by 40%, resolving shift quality issues and band failures common in performance applications. Compatible with all 4L60, 4L60E, 4L65E, and 4L70E models from 1982 onward, this machined servo kit installs easily in-vehicle and comes with a 1-year warranty, making it the ultimate upgrade for enthusiasts seeking reliable, smooth 3-4 shifts.