my trans will not shift from 2nd into 3rd unless I back off normal throttle and then it will give me a weak shift into 3rd . trans will shift correctly from on up through the gears and will also downshift correctly . fluid and fluid level are both good . any suggestions would be helpful . plus any trany shop in the Denver ,Co. area ( besides ATS ) had bad experience there . I am new to Colorado and my health does not permit me to do much mechanic wise anymore . Thanks for any help you can send my way so I won't look like a fool at a trany shop