1409KMT 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up
Product ID: 574261339
Secure Transaction
🔧Easy in-vehicle installation
🚗Fits GM 4L60E series 1982+
⚙️40% more apply surface area
Frequently Bought Together
Description
⚡ Elevate your GM transmission game with unstoppable 4th gear grip!
- BROAD COMPATIBILITY - Seamlessly fits all GM 4L60, 4L60E, 4L65E, 4L70E transmissions from 1982 onward
- TRUSTED RELIABILITY - Backed by a 1-year warranty and expert support for peace of mind
- PLUG AND PLAY UPGRADE - Designed for quick, hassle-free in-vehicle installation—no transmission removal needed
- ENHANCED SHIFT QUALITY - Eliminates common 3-4 shift issues and band failures in performance vehicles
- UNMATCHED HOLDING POWER - 40% increased apply surface area for superior 4th gear hold
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.
Specifications
| 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 |
Common Questions
Trustpilot
TrustScore 4.5 | 7,300+ reviews
Customer service was outstanding when I had questions about the product.
2 days ago
Smooth transaction and product arrived in perfect condition.
3 weeks ago
Shop Global, Save with Desertcart
Value for Money
Competitive prices on a vast range of products
Shop Globally
Serving over 300 million shoppers across more than 200 countries
Enhanced Protection
Trusted payment options loved by worldwide shoppers
Customer Assurance
Trusted payment options loved by worldwide shoppers.
Desertcart App
Shop on the go, anytime, anywhere.
