This 8x7 garage door had cracks and did not have a strut on the top section. Many companies do not attach a strut to 8x7 doors....I'm not exactly sure why they don't do this especially when there is a garage door opener attached. The opener will pull on… more »

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Never repaired a torsion spring in a box truck but its basically the same thing.....as a residental garage door. Only difference is that some of the  parts are welded together and they are smaller. Here are some Photos: more »