1409KMT 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up
Product ID: 574261339
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🔧Easy in-vehicle installation
🚗Fits GM 4L60E series 1982+
⚙️40% more apply surface area
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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
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TrustScore 4.5 | 7,300+ reviews
The product exactly matches the description. Very satisfied with my purchase.
5 days ago
Received my product in pristine condition. Great service overall.
1 month ago
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