I have a 2010 S4 6MT and itís giving me issues when wanting to shift into gear. But it only does this when it is warm outside, when cool or cold then no issues. It makes no noise or grinding, just is literally hard to push it into gear, any gear but mainly 1,2, and R. Clutch pedal doesnít feel any different than before when depressing it. Any advice? Fluid flush and change or something more serious? Has 73k miles. Thanks!