My 1994 900se 2.5 auto non convert and non turbo is acting up. It is slow starting off as if the trans is slipping but as you gain speed it performs fine. At mid range and high speeds if you step on the gas it picks up and goes but from a dead stop, if you goose it, she crawls. Any ideas? I have had the car since last August and changed the fluid twice. There is no serviceable filter either. 91K miles as well. Thanks.