Shelby Block Rear Main Seal Leak

[A98Coupe]

Rick L,

Thank you very much for your comprehensive information & advice. My Aviaid oil pan & windage tray is steel and I am aware about different expansion rates between steel & aluminium and it has crossed my mind that the leak could be due to this. I confirm there is no signs of oil inside the bellhousing or on the back of the flywheel - crank seal side. I also confirm that the leak doesn't show when running on the drive, it only showed after first drive of 18 miles. It could very well be oil leaking past the pan gasket during acceleration. This is a good point for me because it means I can probably fix it without removing the engine - may only have to remove exhausts & hoist engine up enough for pan to clear chassis cross rail.
Anyway, I think that's a winter job and I need to enjoy the car as much as possible over the next few weekends before the British winter sets in and the road salt crews spread that nasty corrosive stuff over the two lane black top!

Thanks again
Stuart