I have the same adapter and have no drips yet. Maybe a little seep from the front of the tranny but I didn't replace the input seal on the transmission. I really don't like the sealed generic bearing that is part of the adapter. Why not put a non-sealed bearing, a drain and a fill plug, or just leave a seal on the 5-speed side? I suppose leaving the oil level that high would make it leak more. I am running the Amzoil equivalent to the Castrol and it shifts pretty smooth but wonder if the Castrol would be better. $12 per quart vs. $25+. Maybe I will use the Castrol next time. I have already had to add some oil to the NV4500 and suspect it is dribbling into the adapter. In hindsight the Dodge drive train from engine to x-fer case would eliminate any adapters. The cost or effort of modifying the gas tank would seem about the same or less expensive.