something sounds wrong, 40mph in 1st??????? and at 4500 to boot? You sure youre not just feeling the covertor not locked and youre still in 2nd? If youre in 2nd, rolling, covertor will be unlocked, you punch it, rpms will rise to about 4500 and hold there, until the wheel speed catches up to the covertor and then itll lock (maybe thats what you think is the shift)?