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I assume yo mean the arm. You pull the cap off, there is a small slot on one side where you can get a screw driver in to pop it off. Then there is a nut to remove. Then the arm pulls off a splined shaft, that will be the hardest part.
The control arm is stripped bad, bout as smooth as a baby's rear. There is some wear on the other spines, but hope it will hold with a different control arm.
Mine is completely stipped too, but the wiper arm shaft is tapered. So the tighter you tighten it the less likely it is to slip. Even though mine has NO splines left, I just tightened it down real good and it has been working good for probably 1 yr.
If it works good in FL where it rains alot and the wipers are used alot, im sure it would work for you.
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