hey all i'm a n00b here but would greatly appreciate a heads up on a good mechanic in seattle for my 2003 2500 sprinter..... i'm having problems with my transmission, it feels like the engine is going to die as i come to a stop, seems like the transmission won't downshift and it's staying in a higher gear than it should. if i shift to neutral then it downshifts and glides smoothly to a stop. i thought it was the RSN i read about in another thread but now i'm not so sure. it's also got a vibration around 40-50 mph too.... plus what's up with the lock on the tube for the trannie dipstick????? WTF!!!!! any help would be greatly appreciated!