---
product_id: 18098782
title: "4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax"
brand: "transparts warehouse"
price: "A$311"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/18098782-4l60-4l60e-4l65e-4l70e-transmission-2nd-gear-super-hold-servo
store_origin: AU
region: Australia
---

# Dual seals for reliability Longer apply pin for efficiency 18% more apply area 4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax

**Brand:** transparts warehouse
**Price:** A$311
**Availability:** ✅ In Stock

## Summary

> 🚗 Shift into Excellence with Sonnax!

## Quick Answers

- **What is this?** 4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax by transparts warehouse
- **How much does it cost?** A$311 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/18098782-4l60-4l60e-4l65e-4l70e-transmission-2nd-gear-super-hold-servo)

## Best For

- transparts warehouse enthusiasts

## Why This Product

- Trusted transparts warehouse brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak Reduction:** Longer apply pin with added seals minimizes oil pressure loss in 3rd and 4th gears.
- • **Enhanced Performance:** Designed to provide strong 1-2 and 2-3 shifts without harshness.
- • **Maximize Your Shifts:** Experience 18% more holding power in 2nd gear for smoother transitions.
- • **Perfect for Upgrades:** Ideal for those seeking enhanced performance without compromising comfort.
- • **Precision Engineering:** Dual seals on the piston ensure optimal band apply/release, eliminating leaks.

## Overview

The Sonnax 2nd Gear Super Hold Servo Kit (Part No. 77911-03K) is engineered for GM 4L60/4L60-E transmissions, offering 18% more apply area than the largest OE option. This kit enhances 2nd gear holding power while ensuring smooth shifts, thanks to its dual seals and longer apply pin designed to reduce oil pressure leakage.

## Description

4L60 4L60E 4L65E 4L70E Transmission 2nd gear super hold servo kit the Sonnax 2nd gear super hold servo kit 77911-03K for GM 4L60/4L60-E has 18% more apply area than the “Corvette” servo (largest OE) and maximizes holding power in 2nd gear with more positive 1-2 and 2-3 shifts. Dual seals on the 2nd gear piston and separator ensure positive band apply/release and eliminate cross leaks, which contribute to 2-4 band and 3-4 clutch failure. This servo is the perfect option when more holding power is desired without causing excessively harsh upshifts and downshifts. The included apply pin is longer than the longest OE pin, and has added seals to reduce leakage of 3rd and 4th gear oil pressure. For the ultimate servo combination in your 4L60/4L60-E, Sonnax recommends using the Sonnax 4th gear super hold servo 77767K with the Sonnax 2nd gear super hold servo kit 77911-03K.

## Features

- The Sonnax 2nd gear super hold servo kit 77911-03K for GM 4L60/4L60-E has 18% more apply area than the “Corvette” servo (largest OE) and maximizes holding power in 2nd gear with more positive 1-2 and 2-3 shifts.
- Dual seals on the 2nd gear piston and separator ensure positive band apply/release and eliminate cross leaks
- This servo is the perfect option when more holding power is desired without causing excessively harsh upshifts and downshifts
- The included apply pin is longer than the longest OE pin, and has added seals to reduce leakage of 3rd and 4th gear oil pressure

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Sonnax |
| Brand | Transparts Warehouse |
| Item Weight | 1.76 ounces |
| Package Dimensions | 5.1 x 4.6 x 3.1 inches |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 77911-03K |
| OEM Part Number | 62-77911-03K |

## Images

![4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax - Image 1](https://m.media-amazon.com/images/I/31q+W4OnitL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fixed my 2nd gear band issue
*by K***Y on November 9, 2024*

I had lost second gear entirely, a quick Google search showed to install this kit to try to temporarily repair a stretched band. Straight forward setup and I’ve been running it for months HARD and I’ve got zero complaints. It’s definitely not a forever fix but I’m very glad I’m able to get more life out of the stock 200k mile transmission. I set the clearance up a bit tight so the shift feels super firm. Love it.

### ⭐⭐⭐⭐⭐ Sonnax 2nd Gear Super Hold Servo
*by F***C on October 15, 2016*

Bought this with the Sonnax 4th Gear Super Servo. Install not too bad with proper tools and if you install it in proper order!!!! Follow the instructions, no matter how many transmissions you've done. Once I reinstalled 2nd gear piston in the correct direction, everything went in easily. BUY A OEM SERVO COMPRESSION TOOL. It will make your life MUCH easier. Hardest part was lowering trans enough to get servos in and out. Most time consuming is filing the apply pin. Use a digital caliper, and use a Dremel with the cupped grinding stone. Grind, measure, grind, measure. Had a 2-3flare after I had to replace Super Dupper, made in China wide band. Put a Borg Warner in and had a 2-3 heavy part throttle flare, 100-200 rpm. Also remove first Sonnax 4th Super Servo, because I thought it might have broke band, which was NOT the case. Installed this with new Sonnax 4th, and I am soooooo very happy!!!! 2-3 flare is gone, trans shifts very positively, 4th is holding better also. Makes the car feel like it is getting more power to the ground because of the positive shifts. These two servos should have come from the factory!!! Very, very nice shift feel. Not banging, tire chirping shifts, but firm, push in the back shifts. No lag between shifts, just shifts instantly in next gear.

### ⭐⭐⭐⭐⭐ Nice improvement.  Difficult install with trans in vehicle.
*by L***T on March 3, 2018*

I ordered this kit with the Sonnax super hold 4th servo and the Sonnax boost valve kit. This was installed in a Caprice wagon with about 80k miles on the transmission. I installed them all at the same time, so I don't know how much of the improvement came from each of these parts. The shift improvement was noticeable to me, but definitely not harsh. My wife did not seem to notice or at least did not complain. So if you're looking for neck snapping shifts from your 4L60, you will need to do more than just these 3 parts.In vehicle installation for this and the 4th super servo was not easy. I had to remove the trans crossmember and lower the transmission as far as it would go. I also pulled the passenger side cat. Clearance was still very tight and this was not an easy install. Installation in a transmission removed from the vehicle would have been pretty simple.

## Frequently Bought Together

- 4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax
- 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up
- Sonnax HD 2-3 Shift Valve

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.au/products/18098782-4l60-4l60e-4l65e-4l70e-transmission-2nd-gear-super-hold-servo](https://www.desertcart.com.au/products/18098782-4l60-4l60e-4l65e-4l70e-transmission-2nd-gear-super-hold-servo)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-28*