All depends on your trailer setup..how long the tongue is, bunk height etc. When retrieving the boat I was taught to let the trailer come up to the boat and let the boat rest on the trailer opposed to leaving the trailer too shallow and motoring/sliding/ramming the boat into position which is rough on the trailer, hitch, boat, and bunks. Launching-boat should be fully floating.

As a boat owner I'm sure you've seen the shinanigans on the boat ramp.

For my trailer setup the rear tires are half wet to be in a good position for dealing with the boat. I could prob get away with not backing in quite as far, but would probably be in the same position with this diff. situation.

Now that I've had this problem I'll be more conscious about how far back I go, and perhaps will opt to be rougher on the trailer and boat to save my diff. Ideally I would like to find the breather vent and route as high as possible for a long term solution.


Btw, looks like the guy on the left side of the pic is in pretty deep too. Feet getting wet if he gets out of the car. Same situation...