[Ghostang96]

I was driving my 95 astro home the other day. as i was leaving the toll booth the tranny did not shift from 3rd to 4th. i shifted out of overdrive and back to see if that was the problem but upon doing that the engine started squeeling and knocking really bad. the oil pressure dropped and the engine died. now when i start it, it still squeels and knocks and there is no oil pressure unless reved. I'm pretty sure that it is the oil pump but i'm just seeing if any of you had a similar problem with different results before i start ripping it apart.