I've posted this stuff before. It was on Nissan Road Racing, where 99% of all technical suspension threads are.




These 3 trendlines show how toe changes with different traction rod lengths. Toe angle versus wheel height. It's called a toe curve. It shows bumpsteer. In the key you'll see that I've got 3 different lengths. 8.25" is about the stock length. The 0" height in this graph is equal to about 2" of drop. X axis is toe, in thousandths.

So yes. Adjustable traction rods do something. They adjust the amount and effect of bumpsteer at the rear wheels. Also, they reduce binding forces for freer wheel travel.

Good enough?