1991 Lincoln Mark VII Transmission

1, D, and OD are displayed, from 1, to D or OD witch is actually
1, to 3rd then can shift to 2nd once in 3rd but won't
Go to 2nd from 1st position it has to be down shifted to get there and once it does it shifts back to first from 2nd no prob but seems late and if you start off with D or OD you don't see the rpm range that 2nd held and 3rd gear seems really short rpm wise on the cycle. I want my 12345 I can only 132345.
Do you think there's coolant in the T fluid cause the R cap leaks and evaporates or sprays a little if I shut the engine off to hot, I did find oil but kinda diluted on top behind the engine where tranny connects an notice cause it stained cats or "pre" lowers and washed it off or think the blocks cracked? The oil was kind of gassy smelling please tell me it's a fuse and to fix radiator tabs that hold the cap tight and do a tranny flush how long do I have doc?