It all a matter of pressures, fluid dynamics and friction. Easier to think of a manual tranny and the clutch, pressure plate and flywheel to get the concept.

When you enage a clutch slowly, the car moves smoothly, no jerking, but at a price. You are wearing the clutch faster due to slippage. Fast clutch engaging, while not as smooth, has very little slippage. Slippage not only wears out the clutch, it also causes over heating, like when you rub your bare feet on the carpet. Your feet are slipping, but friction is also playing a factor.

If your car is performing how it should, no need to worry.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D