Description
Product Overview
The Bonbo Corvette Servo Upgrade Kit is engineered for Corvette models from 1982 to the present, fitting automatic transmissions such as 700R4, 4L60, 4L60E, 4L65E, and 4L70E. Each kit contains a machined aluminum inner housing servo piston, a secondary 1.642″ servo piston, and a Teflon scarf‑cut seal ring. The premium aluminum alloy construction provides higher strength, superior corrosion resistance, and long‑lasting durability while maintaining a lightweight profile. Package dimensions are compact at 4.17 x 3.82 x 1.97 inches, and the total weight is only 9.9 ounces, ensuring easy handling during installation.
![[Product front view showing all components]](https://www.velvetgo.store/wp-content/uploads/2026/06/95bc0bbe5fc1452b976ebea9853b4a9c.jpg)
Usage
Designed for high‑performance and daily‑driver applications, this kit restores proper shift timing and adds holding force for increased torque capacity in 2‑3 shifts. It is ideal for street performance builds, track days, and restoration projects where reliable, firm shifts are essential. Compatible with valve‑body kits, the servo upgrade works seamlessly in both stock and modified transmission setups, delivering smoother acceleration and reduced slip under load.
Why Choose Us
Bonbo combines precision engineering with premium materials to create a servo kit that outperforms standard OEM components. Each piston is CNC‑machined for exact tolerances, and the billet‑finished surface resists wear and corrosion. Our rigorous quality control ensures every kit meets automotive standards, and we back the product with a 30‑day return policy and a one‑year warranty for any manufacturing defects, giving you confidence in your purchase.
Key Features
- High‑strength aluminum alloy pistons provide increased torque capacity and longer service life.
- Precision‑machined components ensure perfect fit and reliable shift performance.
- Includes all necessary parts for a complete installation—no extra purchases required.
- Improves shift firmness and reduces slippage for smoother acceleration.
- Backed by a 30‑day return policy and one‑year warranty for peace of mind.
FAQ
Will this kit fit my 1995 Corvette with a 4L60E transmission?
Yes, the kit is compatible with 4L60E transmissions from 1993 onward, making it a perfect match for a 1995 Corvette.
Do I need any special tools to install the servo kit?
Standard hand tools and a basic torque wrench are sufficient. All required hardware is included in the package.
Can this kit be used with an aftermarket valve body?
Absolutely. The servo pistons are designed to work with both OEM and aftermarket valve bodies, enhancing shift quality in any setup.
What is the warranty coverage for this product?
Bonbo offers a one‑year warranty covering any manufacturing defects, plus a 30‑day return option if the product does not meet your expectations.
Is the seal ring solid or a Teflon scarf‑cut design?
The kit includes a Teflon scarf‑cut seal ring, which provides superior sealing performance and resistance to fluid degradation.




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