[AUSVX]

Unfortunately I know heater core = leaking onto floor boards, very frustrating.

What I was saying was, if an overheating tranny was passing very hot coolant on it's way back from the tranny and circulating through the system, do you think it's possible that could blow the heatercore.

Thanks for the contact Brady, no I haven't spoken to the tranny people yet but thanks for the contact.

Tranny used to slip from 2nd to 3rd occasionally, now it does it all the time and has it's clunks and shudders plus a 1/4 of the fluid that I would pinch off the dipstick with my fingers would be black.

If you're suggesting that removed heat shields have anything to do with the heat around the foot well and centre console, please explain, I've already thought about that but don't have a hoist to check. From a diagram that I've looked at, from memory the SVX also has a massive tranny shield between the tranny and underbody hopefully some idiot hasn't taken that off.
BUT if you're suggesting that removed heatshields are related to a leaking heater core please explain.