This may be a obvious answer question for some but I was curious of the operation of 4WD. My previous trucks have all been 2WD with an anti-spin differential.
My current truck is 4WD and does not have an anti-spin option... so when I back from the street into the driveway ( a 90 degree turn), one rear wheel spins.
I understand that as it does not have an anti spin rear.
So... when I do need 4WD traction... say in sand or snow, does the front differential have the same characteristics?
Shouldn't a optimal 4WD have anti-spin both from and rear? Or do you end up with one front and one back wheel that spins?

 

Yes, a truck with 4wd can turn into one wheel drive in the front and back without an LSD.

You don't find a limited slip in the front because the steering differences are more than it woudl allow in a straight line. Some people have an air locker in the front that they can manually engage when needed.