I recently bought a 2001 ford taurus se, with 127,000 miles and the flex fuel v-6 engine. The transmission shifts hard from 1st to 2nd, but never misses the gears or doesn't shift ect...the transmission seems to shift very firm into every other gear, and it has not slipped yet. I have read that the epc valve sticking can cause the pressure to spike in the transmission and cause the hard shifts, has anyone else had a similar problem?