MOOG T40043 ADJUSTABLE TORSION BAR KEYS – FRONT LEVELING SUSPENSION KIT – 2011–2014 GM 2500HD / 3500HD

MOOG T40043 torsion bar keys, GM 2500HD leveling torsion keys, Silverado Sierra HD torsion bar adjustment keys, heavy duty GM suspension leveling kit, adjustable torsion bar ride height keys, GM HD front suspension adjustment keys, MOOG suspension upgrade components, torsion bar leveling keys for GM trucks

The MOOG T40043 Adjustable Torsion Bar Keys are engineered to restore or increase front ride height on heavy-duty GM trucks equipped with torsion bar front suspension. These precision-machined keys allow technicians to fine-tune torsion bar preload, helping correct sagging suspension or create a leveled stance for lifted or upgraded trucks.

MOOG’s design allows up to approximately 1/2" to 1-1/2" ride height adjustment, helping restore factory ride height lost from worn torsion bars or provide a mild front leveling solution. Built from heavy-duty steel and engineered to OE standards, the T40043 keys provide reliable durability for demanding work trucks and towing applications.

Key Features

• Adjustable ride height design allows leveling or restoring front suspension height
• Heavy-duty steel construction engineered for long service life
• Direct torsion bar replacement key for GM HD trucks
• Improves suspension geometry when factory torsion bars sag
• Precision fitment designed to meet or exceed OE specifications

Fitment

• 2011–2014 Chevrolet Silverado 2500HD – Front Torsion Bar Suspension
• 2011–2014 Chevrolet Silverado 3500HD – Front Torsion Bar Suspension
• 2011–2014 GMC Sierra 2500HD – Front Torsion Bar Suspension
• 2011–2014 GMC Sierra 3500HD – Front Torsion Bar Suspension

These keys are designed for heavy-duty GM trucks equipped with torsion bar front suspension systems. Two keys are typically required per vehicle when replacing both sides.

Specifications for MOOG T40043

FAQ

Torsion bar keys adjust the preload on the torsion bars in the front suspension, allowing technicians to change ride height and restore proper suspension geometry.

These keys allow suspension adjustment that can help level the front of many GM HD trucks depending on torsion bar condition and adjustment range.

Yes. Vehicles use one key per torsion bar, so most installations require two keys when replacing both sides of the suspension.

No. This is an adjustable torsion key designed to restore or slightly increase front ride height, not a full suspension lift system.

Yes. Torsion bars are under heavy spring tension, and proper tools are required for safe installation.