How to increase oversteer during turns with full throttle and preventing rollover by modifying jbeam

So for the hell of it, I decided to take the benz e500, and give it a 11 speed auto trans with a high diff, and extra torque on the high end. I'm no expert, but it turned out quite well. I increased traction and suspension stiffness to compensate. My problem is, that during turning, there's way too much understeer. I went into the jbeam where the differential is located, only to find most of the settings were just references from the fullsize diff. I tried to change the state and type to "locked", "lsd","closed", changed the torque #s and I don't feel that much of a difference. Perhaps these terms are wrong, or the differential is not responsible?

Edit: I'm now having issues with the car turning over during high speed turns, and it seems i cured the understeer issue. For full right/left turns with full throttle from a dead stop, one wheel lifts up and doesn't stay on the ground. For high speed turns, it turns over. I cannot find the variables to change this, yet I'm not entirely sure where in the suspension it's responsible for. the precompression variable doesn't do much.. I also notice that the tie rods go out if I have the wheel all the way to the right or left with full throttle long enough. I increased strength and decreased deform of the steering, and no luck.

 

Of course the benz jbeam was full of references to the fullsize. The benz is one of "those russian mods". You know, the ones that simply slap a ripped mesh onto a bone stock grand marshal jbeam. You are driving a grand marshal not a benz, its just had a mesh crappily dropped in.

 

I know it had lots of refs, however since this mod was on the forums, I didn't know it was a "crappy Russian mod". regardless, I should still be able to improve these issues.