{HEAD ~ The speed change control method} for {TAIL ~ an automatic transmission} 3, wherein said speed changing operation of said second transmission mechanism started in said step includes engaging a third friction element after the one way clutch is locked, said included in the second transmission mechanism and being arranged in parallel, with respect to a power transmission, to the one way clutch 
for
{ HEAD ~ The speed change control method } for { TAIL ~ an automatic transmission } 3 , wherein said speed changing operation of said second transmission mechanism started in said step includes engaging a third friction element after the one way clutch is locked , said included in the second transmission mechanism and being arranged in parallel , with respect to a power transmission , to the one way clutch
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