i ran my car in the driveway today to work on the vaccuum locks which nothing is wrong with them at all but i ran it for 5 minutes and then shut it down.. i just walked by and noticed a small fresh oil spot the sized of 2 quarters next to each other...

it looks like its dripping from where the transmission mates with the engine. the whole back of the block is coated in an oily sand like crud but the front isnt nearly as bad.. is this the rear main seal going or the person who put the new transmission in fault? if i can get the place from the p/o that put the tranny in to fix it because it is their fault ill live but i dont want to take the whole engine tranny out for a stupid seal.. but if it has to i will as soon as i can