Here is the Manual for Joe and Dave KJ02. It recommends every operator read it.
http://www.richmondgear.com/0002pdfs/8221001.pdf
http://www.drivetrain.com/noslipusersguide.html
I would say the book kinda underplays the characteristics, and provides a little double talk according to things I've read and talking with Johnny Brown at Richmond Gear. "Short driveline syndrome"
If you drive like a EURO-Rally driver, you'll notice it.
I'm sure mine ain't the loc-rite
"You may feel torque transfer from both rear wheels to one, and back again. Should you wish to minimize the effects of torque transfer, take turns under less throttle, and make throttle changes more gradually to allow for the smoothest possible operation."
In a turn it will alternate between inner and outer wheel too depending on your gas pedal usage.
I feel, There is force holding the teeth together, If the teeth are engaged it ain't gonna disengage till you take the load off turn or no turn. If it disengages under constant power you will feel it and hear it. You would not want that.
When you do donuts, are both your tires slinging mud, mine do until I let off the gas, then my inner becomes the slinger until I turn the other way.
If I hit a ramp under power, mine will stay engaged untill I let off the gas. Thats why I let off the gas as I enter the turn or halfway thru it. I guess it depends on how tight the ramp curve is and how much pedal you are using.
On tight winding mountain roads mine is in a state of constant engage/disengage.
I'm begining to love mine after altering all of my driving habits. Generally if a vehicle survives 2 years with my PREVIOUS driving habits, it will last me 7+ with little maintenance.
You either love it or hate it. I do think Joe will love it.