I'm just informing what the parts manual says buddy, thats all iv'e got. Matching part numbers. I'm still trying to wrap my head around how they could lose a subframe WTF.
According to the parts manual, HR33 4 door Skyline subframe fits HC34 Laurel. So no to the question. Apparently the C33 has the same subframe as R32 Skyline
"them" might be wrong, check it again at a real auto transmission workshop. Or carry on procrastinating ,pretend everything is ok and get a bigger bill later.
Torque convertor is not locking up. Check your ATF level and condition. If level and condition good, Torque convertor probably cactus. If ATF is low or dark and dirty, get it serviced, punch self in face.