Is this normal?

[E150GT]

I know these things have been discussed over and over but I'm still not sure of these. Should these thing be normal on a 1986 w126 420sel....?

1. The brakes always squeal in reverse.
2. The car slams into reverse when its warmed up, but never on the first backup of the day or if I put it in park before I reverse it's somewhat of a lesser blow.
3. In the morning, when I put the car in reverse or drive, I feel and hear creaks and grinds coming from the front and rear of the car wich go away when the car is warmed up.
4. The brakes make grinding noises when I come to a stop when the cars not warmed up. And no, the pads do not need to be replaced as they are under 50 percent worn.

Any help on this would be appreciated. Thanks