On a torsion setup this old, we don't patch a single spring and call it done - if one side has fatigued after sixty-plus years, the other is close behind, and we'll say so plainly before we touch anything. The fix is usually a matched spring pair sized to the actual door weight, not whatever was standard when the house was built, because a lot of these doors have been swapped for heavier insulated panels since 1959 without anyone upgrading the spring to match. We check the header board it's mounted to while we're up there, since original lumber from that era sometimes needs reinforcing before new hardware goes on it. If the track is bent or pitted from decades of a mismatched roller size, we replace the track section rather than trying to bang it straight, because a straightened track rarely tracks true for long. We'll walk you through what we're replacing and why before we start, not after the invoice.