[300SLR]

Many years ago, when slot racing was in an earlier state of development, there were lots of experiments with differentials.

Compared with a solid axle there are some obvious features of differentials like extra cost, extra weight, robustness issues and something else to go wrong. Some would have accepted all that and use differentials if they made the car go better. In general they didn't make the car go better, so slot cars with differentials became very rare.

 

[300SLR]

Yeh LSDs are they way to go in much full size racing and rallying these days. The limited slip diffs used at the top end are pretty high tech and depend on a detailed understanding of what the tyres are doing. There just isn't that level of understanding about what slot car tyres are doing. So even if there was a practical way of building a high tech LSD for a slot car, working out what characteristics to build into it would be a whole new ball game. That's now of course, who knows what will get developed in the future?