AOD vibration/OD gone?

ok guys...my 88 5.0's AOD tranny sounds like its on the way out when im driving the car its ok until i get up to about 3rd gear and hit around 35+ mph, then the tranny begins to make a noise and vibration and im able to rev higher to 4k rather than staying at a cool 2k accelerating( this happens with OD on and driving in D )...the previous owner had the tranny flushed and filled back in october and the fluid does smell a little burnt now....how can i tell if i have low pressure or a busted OD band? anyone have any thoughts on this? i havent been driving in it around since it happened but twice for my friends to see and check it out, hopefully my mechanic friend thats at a dealership can check it out for me soon...also what would cause my tranny to have low pressure on the fluids? i havent dropped the pan to see if i have any metal shavings or chunks, so i'll find out monday w\my mechanic friend thanks guys

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