Mevotech Supreme Torsion Bar Key P/N:MS43904
Replace a worn or damaged front torsion bar key with the Mevotech Supreme Torsion Bar Key, part number MK100012. It fits many vehicles, among them the 1999-2004 Chevrolet Silverado 2500, 2007-2010 Chevrolet Avalanche and 2001-2010 Chevrolet Silverado 2500 HD. See the Buyer's Guide tab for the full list. This key lets the torsion bar's twist be adjusted to set front ride height.
The key couples to one end of the torsion bar, and the adjuster bolt bears against it. Turning the bolt rotates the key, which changes the bar's preload and the height at which the front of the vehicle sits.
Signs a torsion bar key may need replacing include a front end that sits low or uneven from side to side, an adjuster that will not hold its setting, or a key that is visibly cracked or worn. Worn torsion bars or other suspension parts can cause similar symptoms, so diagnose the cause before replacing parts.
Torsion bars store significant spring tension. Follow the vehicle service procedure to unload and reload the bar, and check ride height and wheel alignment afterward.
Interchange: XL325328CA · IK100012 · K100012
This part cross-references / interchanges with the following part numbers:
What does a torsion bar key do?
It connects to the torsion bar and takes load from the adjuster bolt. Turning the bolt rotates the key, which changes the bar's preload and the front ride height.
Which vehicles does the Mevotech Supreme MK100012 fit?
It fits many vehicles, among them the 1999-2004 Chevrolet Silverado 2500, 2007-2010 Chevrolet Avalanche and 2001-2010 Chevrolet Silverado 2500 HD. See the Buyer's Guide tab for the full list.
What are signs a torsion bar key may need replacing?
Look for a front end that sits low or uneven, an adjuster that won't hold its setting, or a visibly cracked or worn key. Other suspension parts can cause these signs too, so diagnose the cause first.
Are there special steps when installing a torsion bar key?
Torsion bars store significant spring tension. Follow the vehicle service procedure to unload and reload the bar, then check ride height and wheel alignment.
Which part numbers does MK100012 replace?
It cross-references interchange numbers XL325328CA, IK100012 and K100012.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.