It doesn't matter if the truck is cold, hot, in between, just started up or have been driving it for hours, reverse will still take for ever to engage, and then u have to rev it lightly to get it to engage. And if I remember correctly, 94 and later dodges have a check valve in one of the cooler lines to prevent the overnight drain back common in the older ones.

If it was a band adjustment issue, wouldn't it slip all the time in reverse and never fully engage? Like I said previously once it grabs reverse it's in, you can torque brake it in reverse on dry pavement and it won't slip, it'll even begin to do a brake stand. There is no issue on the 2nd to 3rd shift, all forward gears work/shift perfectly. I'll start with a band adjustment and see what that does. Could it be a seal in the servo thats pooched? That might explain why I have to rev it to get it to catch, as when you rev it it increases line pressure, right? Any other ideas?