Torsion see above which mounts on the header above the door and extension photo 1 which floats above the upper roller track.
How to install garage door spring.
Garage door springs come in two styles.
Install the new spring reinstall the pulley and reconnect the safety cable and you re done.
Disconnect the spring from the track bracket and the spring pulley and disconnect the safety cable from one end.
A couple of carabiners can.
A pair of new springs cost about 25.
The doors with two springs are easy to replace.
In the past extension springs were safer to install but didn t have containment cables running through the center of the spring.