my 03 when sitting a stop light and easen forward, feeling a bad vibration from drivetrain area, u can also duplciate it if in park at idle and barely come off idle to about 600 rpms same vibration. thought maybe torque converter since im also getting a little slippage at hhighway speeds when getting on it from 60mph to 70mph. but since its doing it idle also thought maybe motor mount too, any ideas? truck now has 165,000 miles