Hi, I've been looking for a solution to the problem for a few days - the car slides (itself) on the track. I checked HDV and TGM files, (also tried different tires).
@Pocisk looks like you're on the .tbc files instead of the .tgm. Press Ctrl-T (or Alt-T, I can never remember which) to switch between them. The tbc tyres don't work well at very low speeds. If that's not it, check that your .tbc radius closely matches the .tgm radius with the current load. Switching between the two models should produce virtually no change in ride height.