I have a 2007 Camry SE 3.5 V6 6Spd Auto 168k miles.. Transmission is shifting funny from 3-4, revs high like its slipping then shifts into 4th fine.. sometimes it slips 500rpm, sometimes 100-200rpm.. ONE TIME it revved over 1,000rpm, then other times it shifts fine.. doesn't matter how much pressure I put on the gas pedal.. it actually seems to shift better when I'm above 50% throttle.. at low throttle 10-20% it feels like it slips a few hundred rpms? Im thinking it's solenoid? I changed the fluid and filter 10k ago step by step per manual (it was dark so I dropped pan twice) it has helped but seems to be getting worse again... Anybody else ever hear of this issue? Thanks!