Sup... I have a 99 VXR and I caught a flat a few months back and put on the spare tire and that's when all the fun began. I couldn't drive. From what i could sum up, The TOD kept registering the smaller Spare as a slip and kept going in and out of 4wheel drive with a HARD knocking sound like i was destroying the transmission. At less then 5 miles an hour with tears in my eyes i finally made it to a tire place that fixed the flat and put it back on. Once on, everything was back to normal. And so I thought about it a moment, What's the point of supplying a spare if i cant drive the car with the spare on? but it was fixed so I moved on. Today I got 2 brand spanking new used tires for the front (metal was starting to show lol) But the idiot gave me the wrong size tires. instead of 245/70/16 he put on 245/75/16. Not a big deal i thought. till i drove off and once again the TOD started wilding out. I love TOD but what the hell is up with it? DO i have to change all 4 tires? do they all have to be the same size? Can i turn it off or how do you adjust it? This car is as mysterious as it is beautiful.