The truck is an 03. It is pouring oil out of the rear of the block. If you are laying under it and look up at the rear of the motor it looks like it is coming out of the housing that the tranny bolts to. It started all of the sudden and leaked out more than 2 gallons in about a 10 mile period. Does anyone know what this could be and if the tranny has to come out to fix it? Thanks in advance.