4-wheel drive and out it comes. But wait, my truck is a 2-wheel drive that lacks even a limited slip differential. This has happened to me so many times that I have become an expert at getting unstuck. The following are some tricks I use to get out of this situation. However, before attempting any heroic measures I first make sure I have not backed my trailer off the end of the ramp.
Many ramps have a sharp drop off at their ends, especially if a lot of boats are power-loaded there.
On a very low tide it is easy to back a trailer's wheels off the end of ramp. Never, never try to pull out a loaded trailer if this has happened, because you may rip the axles off the trailer. I saw this happen on several occasions at the inside Cedar Key ramp before it was rebuilt. If I find I have backed off the end of a ramp, first I unload my boat. Next I try to pull the empty trailer up the ramp.