This is topic broken torque boxes in forum General Talk at Northern California Ford Owners .
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Posted by iron50 (Member # 11231) on
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Posted by iron50 (Member # 11231) on
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weak area in the Mustang’s chassis—the torque boxes. It only takes a few 5,000-rpm launches with slicks to start ripping up the torque boxes even on a stock Mustang—but when you throw real power at it, it gets ugly in a hurry.
The torque box is held together only by spot welds, so many people just weld them up by running a bead joining the torque box with the framerail. This practice provides extra strength for the torque box, but you’re still talking about sheetmetal, so the ideal way to sure up the torque box area is to install Wild Rides’ Battle Boxes. The Battle Boxes reinforce the torque box area by strengthening it and greatly lessening flex. Continuous stress on the torque box area from the twisting of the rearend under hard acceleration causes them to tear, but it doesn’t happen all at once. Think of it as an aluminum can. If you twist the ends of the can in opposite directions, it fatigues over time until it eventually begins to tear in half. The same goes for the torque boxes. This condition is more common for Mustangs that have traction enhancements at the rear. The greater the traction, the more stress is exerted on the torque box
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