Side-swiped on the street

[Mr_Rich]

Sometime between last week and this week some coward hit my truck. The damage could've been worse cosmetically. The real concern is that my trans is leaking a puddle now. The truck is drivable. I'm concerned about hidden damage. The parking brake was set but I think the truck was moved from it's parking spot a bit. Hard to tell. The back alloy rim has a folded edge but still holds air. It will need to be replaced. I guess the discussion I'm thinking about is regarding the 700R4 trans. Maybe the parking pawl is damaged. Maybe I could jack up the rear end off the ground and see how much play in the driveline (?).