---
product_id: 3275704
title: "Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax"
brand: "lisle"
price: "S/.296"
currency: PEN
in_stock: true
reviews_count: 13
category: "Lisle"
url: https://www.desertcart.pe/products/3275704-lisle-22100-flywheel-locking-tool-for-6-6-l-duramax
store_origin: PE
region: Peru
---

# 36mm 12-pt socket included Saves 1+ hour labor Fits 6.6L Duramax flywheel Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax

**Brand:** lisle
**Price:** S/.296
**Availability:** ✅ In Stock

## Summary

> ⚙️ Lock it down, speed it up — the ultimate Duramax flywheel hack!

## Quick Answers

- **What is this?** Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax by lisle
- **How much does it cost?** S/.296 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/3275704-lisle-22100-flywheel-locking-tool-for-6-6-l-duramax)

## Best For

- lisle enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Machined combination material with lifetime warranty for professional-grade durability.
- • **Precision Fit:** Custom-designed for 6.6L Duramax engines with Allison transmissions for flawless engagement.
- • **All-in-One Kit:** Includes heavy-duty 36mm 12-point socket for bolt removal and re-torqueing.
- • **Unlock Time Savings:** Skip starter removal and cut water pump job time drastically.
- • **Effortless Operation:** Slide-in tool locks flywheel securely through transmission inspection port.

## Overview

The Lisle 22100 Flywheel Locking Tool is engineered specifically for 6.6L Duramax engines with Allison automatic transmissions. It securely locks the flywheel in place via the transmission inspection port, eliminating the need to remove the starter during harmonic balancer or water pump service. The tool includes a 36mm 12-point socket compatible with a 3/4" drive, enabling easy removal and re-torqueing of the harmonic balancer bolt. Compact and durable, this tool saves over an hour of labor and comes backed by a lifetime warranty, making it an essential upgrade for professional mechanics and serious DIYers alike.

## Description

Locks Flywheel in Place When Removing Harmonic Balancer on 6.6L Duramax Engines with Allison Automatic Transmissions.Saves time by locking the flywheel at the transmission instead of having to remove the starter for water pump replacement. On 2500 and 3500 pickups, remove metal spring-loaded inspection plate on the bottom of the transmission. Tool should slide into opening toward engine with the top of the tool engaging the teeth of the flywheel. On 4500 and 5500 trucks, remove the rubber inspection cap on the bottom of the transmission. Insert the tool at the front of the opening to engage the flywheel and hand tighten bolt to hold tool in place. Use 36mm 12 point socket with 3/4" square drive to remove harmonic balancer bolt and re-torque on installation. 36mm 12 point socket can also be used on axle nuts.

Review: Perfect - It worked great, I removed the small metal cover on my transmission housing on the driver side and installed the locking tool, I duck taped the truck keys to the locking tool area to make sure I removed the locking tool before starting the truck. I also removed the starter and stuck a 3/8 extension through the starter hole into the flywheel to help hold down the fly wheel even better. After removing the fan, I placed a piece of cardboard behind the radiator to protect it, I used the socket with a breaker bar and a thick pipe over the breaker bar for more leverage and the crank bolt loosened up. It takes some effort, but it’s possible. Make sure to replace the oem crank bolt, as they are a one time use. Also make sure you find the specific torque spec for the crank bolt, it goes on there tight
Review: Awesome tool - well worth the money! - This tool easily pays for itself ... I had to change out the water pump on my 2005 GMC 2500HD with the 6.6 litre Duramax motor. The job requires you to pull the harmonic balancer which requires you to break free the 36mm 12 point bolt (may require up to 500 ft. lbs to braek it loss - despite the fact it only needs to be tightened to 260 ft lbs). Without this tool, many recommend pulling the starter and jamming something in to the fly wheel to hold the motor while breaking free that bolt - this entails a sh_t load of extra work ... this tool eliminate all of that. Just remove the little metal inspection plate on the left underside of the bell housing and slip the tool in there. Make sure it is seated properly, then break free the main pulley bolt ... easily (with the help of a long leverage bar)! Same tool is used to tighten that bolt to the 260 ft. lbs. spec! Well worth it and you get the 36mm 12 pt socket with the tool (which would cost roughly $10 at a parts store anyway!). Hope this helps and good luck on your water pump job (the tool will save you about an hours worth of work).

## Features

- Locks flywheel in place when removing harmonic balancer on 6.6L Duramax engines with Allison automatic transmissions
- Saves time by locking the flywheel at the transmission instead of having to remove the starter for water pump replacement
- Use 36mm 12-point socket with 3/4 square drive to remove harmonic balancer bolt and retorque on installation
- Package dimension is 4.5 inches width by 5 inches height by 2 inches depth

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002MCVPOO |
| Best Sellers Rank | #76,707 in Automotive ( See Top 100 in Automotive ) #39 in Engine Flywheel Tools |
| Brand | Lisle |
| Brand Name | Lisle |
| Color | Factory |
| Customer Reviews | 4.8 out of 5 stars 1,201 Reviews |
| EU Spare Part Availability Duration | 1 years |
| Finish Types | Machined |
| Global Trade Identification Number | 00083045221005 |
| Head Style | Hex |
| Included Components | 36mm 12 pt. Socket, Duramax P/U Flywheel Lock, Duramax 4500/5500 Flywheel Lock, Socket Head Cap Screw |
| Item Package Quantity | 1 |
| Item Type Name | Flywheel locking tool |
| Item Weight | 1.5 pounds |
| Manufacturer | LISLE |
| Manufacturer Part Number | 22100 |
| Manufacturer Warranty Description | Lifetime |
| Material | Combination |
| Material Type | Combination |
| Measurement Standard | Metric |
| Model Number | 22100 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operation Mode | ON-OFF |
| Package Quantity | 1 |
| Part Interchange Info | 22100 |
| UPC | 083045221005 |
| Unit Count | 1 Count |
| Voltage | 1 volts |

## Product Details

- **Brand:** Lisle
- **Color:** Factory
- **Item Package Quantity:** 1
- **Item Weight:** 1.5 pounds
- **Material:** Combination

## Images

![Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax - Image 1](https://m.media-amazon.com/images/I/81eji6-rBAL.jpg)
![Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax - Image 2](https://m.media-amazon.com/images/I/71-PZscOXnL.jpg)
![Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax - Image 3](https://m.media-amazon.com/images/I/71xHLVny5KL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by K***A on July 3, 2026*

It worked great, I removed the small metal cover on my transmission housing on the driver side and installed the locking tool, I duck taped the truck keys to the locking tool area to make sure I removed the locking tool before starting the truck. I also removed the starter and stuck a 3/8 extension through the starter hole into the flywheel to help hold down the fly wheel even better. After removing the fan, I placed a piece of cardboard behind the radiator to protect it, I used the socket with a breaker bar and a thick pipe over the breaker bar for more leverage and the crank bolt loosened up. It takes some effort, but it’s possible. Make sure to replace the oem crank bolt, as they are a one time use. Also make sure you find the specific torque spec for the crank bolt, it goes on there tight

### ⭐⭐⭐⭐⭐ Awesome tool - well worth the money!
*by U***S on December 28, 2011*

This tool easily pays for itself ... I had to change out the water pump on my 2005 GMC 2500HD with the 6.6 litre Duramax motor. The job requires you to pull the harmonic balancer which requires you to break free the 36mm 12 point bolt (may require up to 500 ft. lbs to braek it loss - despite the fact it only needs to be tightened to 260 ft lbs). Without this tool, many recommend pulling the starter and jamming something in to the fly wheel to hold the motor while breaking free that bolt - this entails a sh_t load of extra work ... this tool eliminate all of that. Just remove the little metal inspection plate on the left underside of the bell housing and slip the tool in there. Make sure it is seated properly, then break free the main pulley bolt ... easily (with the help of a long leverage bar)! Same tool is used to tighten that bolt to the 260 ft. lbs. spec! Well worth it and you get the 36mm 12 pt socket with the tool (which would cost roughly $10 at a parts store anyway!). Hope this helps and good luck on your water pump job (the tool will save you about an hours worth of work).

### ⭐⭐⭐⭐⭐ Got the dreaded job done
*by J***S on June 17, 2022*

I wasn't sure because it was so cheap, but I needed this part and had already spent enough on the water pump. Way easier and faster than the engine crank method. The flywheel lock tool and socket did not break and got the horrible job done. It made it a little easier without risking any damage. I highly recommend this if you are changing your own water pump on a duramax. This was perfect for my LBZ.

## Frequently Bought Together

- Lisle 22100 Flywheel Locking Tool for 6.6L Duramax
- ARP 129-2503 Dampener Bolt (GM Durmax)
- FEL-PRO ES 71347 Water Pump Mounting Set

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-10-13*