Slope Question

[JWR]

I simply don't worry about SLOPE. The only slope on my 80 acres is 45 degrees and I DO NOT even go straight up it. ...

Going horizontal just is not worth the risk. And my rear tires are spread as wide as possible and filled with rim guard.

I assume you mean 45% not degrees, right ? With good soil and good tires a 45% slope is very feasible to go up or down with a 4WD farm tractor. Done it many times.
A 45 degree slope is a 100% slope and no wheeled vehicle is going up it. Going down it is called an "out of control slide." Tracked vehicles like dozers of course do (carefully) handle such slopes.