I recently purchased a 2012 Chevy Cruze Eco. This is my first vehicle with a manual gearbox. One problem I'm having is determining at what RPM & speeds I can downshift. It seems like I can downshift 4 -> 3 between 15-20 mph with no jerks a I do it but I'm too nervous to test the other gears because of transmission and engine damage. Does anyone have a table or guidelines for what RPM & speeds it is safe to downshift to for each gear? I tried searching the forums but could not find any table or guidelines for downshifting for this model.
I would greatly appreciate it.