Jetuplusllc LS/LT Flywheel & Flexplate Crank Holding Tool — Aluminum, Powder-Coated, Includes Bolts

The Jetuplusllc LS LT Heavy Duty Flywheel Flexplate Crank Holding Tool secures the crank for installing or removing balancers, flywheels and torque converters on GM LS engines.

This precision aluminum holding tool is built for professional mechanics and home engine builders working with GM Gen III, IV and V (LS) platforms. Powder-coated for durability and supplied with two mounting bolts, the tool fastens to the starter bolt flange to lock the crankshaft while you torque or remove fasteners. It’s a compact, repeatable solution that replaces jury-rigging or risky clutch methods when servicing engine front or rear accessories.

How does this tool prevent crank rotation during repairs?

The holder mounts to the starter bolt flange and bears against the flexplate or flywheel, creating a rigid stop to prevent crankshaft spin while loosening or tightening bolts. It stabilizes the crank so you can apply correct torque without a second person holding a breaker bar.

• Attaches to starter bolt flange for positive anchoring
• Aluminum construction resists bending under load
• Powder-coating reduces wear and corrosion
• Includes two mounting bolts for secure installation

Which engines and applications is this compatible with?

Designed specifically for GM Gen III, IV and V families, this holder fits all LS-series V8 engines used in a wide range of vehicles and swaps. Use it whenever you need to install or remove balancers, flywheels, flexplates, torque converters, or to hold the crank for heavy fastener work.

• Fits all LS engine variants from Gen III through Gen V
• Works for front balancer and rear flexplate/flywheel jobs
• Suitable for engine swaps and bench repairs where starter flange is accessible

What are the tool’s materials and package contents?

The holder is machined from lightweight aluminum and finished with a durable powder coat to resist chipping and surface rust. Each package ships with the holding tool plus two mounting bolts so you can mount and use it immediately without sourcing fasteners.

• Material: machined aluminum for strength and light weight
• Finish: protective powder coat in natural color
• Includes one holding tool and two mounting bolts

How do I install and remove the holder safely?

Installation requires access to the starter bolt flange; remove the starter if needed to reach the flange. Align the holder, install the supplied bolts and tighten securely, then perform your balancer or flexplate service with the crank locked. Always follow standard safety and torque procedures when working on an engine.

• Gain access to the starter flange (starter removal may be required)
• Align and fasten the holder using supplied bolts to the flange holes
• Verify secure fit before applying breaker bars or impact tools

Who this is for: The Jetuplusllc LS LT holding tool is ideal for professional shops, performance builders and experienced DIYers who work on GM LS engines. If you routinely remove or install harmonic balancers, flywheels, flexplates, crank pulleys or torque converters and need a reliable way to stop crank rotation without improvisation, this tool provides a simple, repeatable, engine-specific solution.