Lisle 22100 Duramax Flywheel Holder & Socket

PART# 22100 | SKU LI22100
★★★★★ ★★★★★ 5.0 (7 Reviews)

Vehicle Fitment For:
2001-2026 GM 6.6L Duramax Engines LB7/LLY/LBZ/LMM/LML/L5P (Allison Trans)

See full application list below
$46.12

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Description

The Lisle 22100 Flywheel Holder & Socket saves time by locking the flywheel at the transmission instead of having to remove the starter for water pump replacement. For the 2500HD/3500HD pickups you need to remove metal spring-loaded inspection plate on the bottom of the transmission. The tool should slide into the opening toward engine with the top of the tool engaging the teeth of the flywheel. When working on 4500HD and 5500HD 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 retorque on installation. The 36mm 12 point socket can also be used on axle nuts.

Features
  • Locks Flywheel 
  • Fits Duramax Engines 
  • Ideal For Water Pump Replacement
  • Eliminates The Need To Remove The Starter
  • 36mm 12-Point Socket For Harmonic Balancer Bolt

Kit Includes:
36mm 12 pt. Socket
Duramax 2500HD/3500HD P/U Flywheel Lock
Duramax 4500HD/5500HD Flywheel Lock
Socket Head Cap Screw

Manufacturer Warranty*:
Limited Lifetime

Instructions & Tech Info

Installation Info
Customer Average
0.5 Hour

Reviews For Lisle 22100

Overall Rating
5.0/5
7 Reviews
Rating Snapshot
5 ★
7
4 ★
0
3 ★
0
2 ★
0
1 ★
0
Verified Buyer
★★★★★ ★★★★★
Factory LML
LML Duramax (Tennessee) | May 22nd, 2026
Must needed tool for lockout of flywheel to remove balancer crank bolt. Entire tool kit was expected quality of Lysle.
Verified Buyer
★★★★★ ★★★★★
Duramax flywheel holder and harmonic socket
Steve (Barclay, Maryland) | December 18th, 2025
Shipping was fast, excellent Quality! Would highly recommend!
Verified Buyer
★★★★★ ★★★★★
Overall 100% great tool
Chandler (Texas) | October 13th, 2024
Tool fit and worked great, the shipping was very quick and helpful. Very nice as a one time buy because it goes into the speciality tool drawer!
Verified Buyer
★★★★★ ★★★★★
Great and neat tool to have!
Slickwood98 (Valparaiso, IN) | July 19th, 2023
Worked very well. Don't forget to pull it out of the flywheel before you start it up. I see on the job I did, someone forgot to. order #1940922
Verified Buyer
★★★★★ ★★★★★
Worth the money
Johnny (AZ) | November 10th, 2022
Great product and good quality with fast shipping!
 
★★★★★ ★★★★★
Excellent tool
Brent (CO) | May 14th, 2021
This tool and socket works great had absolutely no problem with removing the damper with it.
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More to Consider

Specifications For Lisle 22100

MPN 22100
SKU LI22100
GTIN 083045221005
ID 31447
Manufacturer Name Lisle
Shipping Weight 3.00 lb.
Shipping Length 3 in.
Shipping Width 3 in.
Shipping Height 4 in.
Fuel Type Diesel
Manufacturer Warranty* Limited Lifetime
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Cross Reference # J-44643, J44643, KMJ44643, KTMJ44643, 7221
Internal L0R5

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