T-56 Transmission Install Thread

So I just installed a throwout bearing spacer this weekend and still have trouble getting the car into gear when it gets hot. The spacer definitely gave me better clutch release and makes getting between gears a little smoother, but after driving around for a while I still can't get it into gear at stop lights. When I checked the fluid last time as well it was black. Not amber, black. I'm trying a heat sleeve next as that seems like it makes the most sense for what appears to be happening (heat soak), but the symptoms seem a little backwards. I'd think if it was getting hot it would pressurize the system from expansion and cause the clutch to slip, but it's doing the opposite for me. The line isn't around anything hot either, so I'm really not sure where the temp would be coming from, but can't think of anything else to try.