Garage Doors/Spring Tension


Hi Mike,

I just replaced my broken garage door opener gear. When I looked the 2 springs. One is straight. But the other has little dip in the middle. I wonder if that one losses its tension. The opener is working well now. Both open and close forces are set around 4. The door is 2 cars size and the opener is 1/2 horse power.


HI Yan,

YOu didn't say the opener brand but I assume it is either Sears, Liftmaster, Chamberlain, with a white helicle gear meeting a worm gear on the motor shaft. The total gear assembly, (part# 41a4220 ) should be replace, including the worm gear and bushings or you will be doing it again in about 2 years. Most gear systems last about 10 years when all works well. As far as your springs, you didn't mention the type of spring. There is torsion type which mounts over the top of the door, and stretch type spings, which extend from the back end of the track to the front wall. Any type of spring is extremly dangerous and should only be repaired /replaced by an IDEA ( accredited door company. Either way the opener only does what you do. If its heavy to you, or falls down from the open position means the spings are probably bad. If the springs have not been replace in the last 7 - 10 years, they should be rather than waiting for them to break. Hope this helps,

YOurs in doors,


Garage Doors

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Mike Whitacre


I will not answer questions about garage door openers 20 years old or older as they are unsafe, PURCHASE A NEW ONE. How many cell phones have you owned in 20 years? I have 40 years in the garage door industry and have seen almost everything. I sat on the Wayne/Dalton dealers board in 1986,1987,and 1988. I am on the IDEA board of directors ( and am accredited by same. I will, to the best of my ability answer your questions on doors or openers. I will not deal with shinbuster type doors. Replace it if you have one! If your question is about stretch type springs, call an IDEA accredited dealer and have torsion springs installed.


I have been in the overhead door industry for 40 years. I have dealt with all major brands of garage doors and openers. I have been a member of the International Door Association for 25 years( My speacialty is working with and understanding stretch and torsion springs. However, I will never recommened a customer to deal with a garage door spring.

International Door Association, Door and Access Manufacturer's association, Institute of Door Education and Accreditation, American Legion

I have 2 years of collage , am on the IDEA board of directors, and if you didn't notice have been in the industry for 40 years!

Awards and Honors
I recieved the Train the Trainer certification from the Institute of Door Education and Accreditation in April 2001.

Past/Present Clients
Cal Ripken

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