⚡ Elevate your GM transmission game—hold tight, shift right!
The Sonnax 4th Gear Super Hold Dual Servo Kit (77767K) is engineered to enhance the holding power of GM 4L60, 4L60E, 4L65E, and 4L70E transmissions from 1982 onward. Featuring 40% more apply surface area, it addresses common 3-4 shift quality issues and band failures, delivering reliable performance upgrades with easy in-vehicle installation.
| Manufacturer | LANHO AUTO PARTS |
| Brand | 1409KMT |
| Model | KMT-OT001426 |
| Package Dimensions | 9.7 x 9.19 x 6.4 cm; 558 g |
| Item model number | KMT-OT001426 |
| Exterior | Machined |
| Manufacturer part number | KMT-OT001426 |
| Item Weight | 558 g |
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