I have my '99 F450 in the shop for an oil leak at the oil pan. Before I took it in I found the leak to be coming from the dipstick fitting on the passenger side of the oil pan. The shop is saying that the oil pan needs to be dropped in order to fix the leak but in order to do that they need to pull the engine. Can anyone tell me if this is true that the engine needs to be pulled in order to drop the oil pan? Seems to be a pretty crappy design if this is true.