Hey guys, I'm stumped here and hope you all can help. I recently rebuilt the 4.3 V6 engine and put in a used 700R4 from pick and pull, now I'm having an issue with oil pressure which I'm hoping to solve today with a new oil pump but it seems when I stop to back in my driveway and put the truck in reverse it blows a lot of white smoke as soon as it's in reverse then is fine ? any ideas what might cause this ? I used original pistons wit new chrome molly rings, and put new bearings throughout the engine, it runs as smooth as can be and very quite.
