I run a 4hp22 from an LSE. Thinking back, my converter might actually be out of a 4.0 RR P38. I had to swap a few bits over so i could run my MS off the standard crank sensor. But either way, i'm definately not running the 4.6 TC, it's still sat on the shelf.
I run a big P38 oil cooler on my gearbox, but even when i had the 4.2 in it - could quite often see temperatures of 140 C. On paper thats not good, but touch wood it's not died yet. Hydraulic winches being driven whilst in bogs aren't nice on auto boxes if you ask me !
G