For a 1977-era door in Kaufman, we're usually carrying standard torsion springs sized for older sectional doors, plus the drums, cables and bearing plates that tend to wear alongside a spring that's finally given out. If the opener's been compensating for a weak spring for a while, we check the gears and the drive while we're in there, since a stripped gear from overwork is common on a door that's been fighting a bad spring for months. We don't stock every obscure or discontinued spring size on the truck, so if your door uses something unusual, that can mean a short wait on a part rather than a same-visit fix. We'll tell you straight if that's the case instead of guessing and coming back twice.