Yes you can disable the traction control on the Gen2 Prius: http://priuschat.com/forums/gen-ii-...n/29334-can-you-disable-tration-controll.html I tried this procedure on my Gen2 about 3 years ago from an earlier thread. I think the procedure worked fine but I didn't drive the car that way to see if it were really disabled or not, I just moved it around the driveway to see if I could. There is a danger of damage to the PSD with TRAC disabled. It is called an inspection procedure and could be used to run the car on a chassis dyno. It's needed because the Gen2 TRAC (and also the Gen3 I imagine) uses an input from all 4 wheel speed sensors. TRAC won't let you apply power unless the front and back wheels are both moving at about the same speed. I think our late friend Brian of BT Tech did try this on his dyno and reported that it worked. The first time he ran his Prius on the chassis dyno he did not know about this procedure and disabled the wheel speed sensors. That same procedure (or a different one) might work on the Gen3 but I hadn't intended to try it because it has no practical value other than testing due to possible PSD damage.