Noticed a small oil leak back in January on my truck, and thought it may have been just excess spilled from a recent oil change. Then as the days and weeks progressed, the leak got worse.. Crawled under and noticed it coming from the top rear section of the motor, with a stronger drip on the driver side, with a few drops coming from the passenger side, leaking down the tranny. Now it is a steady and heavy leak, but only begins to leak as the truck warms up. does not leak from start up. after about 5-10 minutes at idle, it begins and worsens as the motor heats up. Changed driver side valve cover gasket thinking it may have had something to do with it, but it didnt solve the whole problem. Any help would be appreciated.