The car has automatic transmission. The spark plug and transmission fluid was changed 15000 miles back. I occasionally check the fluids, transmission and engine oil: both are ok/// The distributor cap, rotor and wires were changed 50000 miles (3 yrs)back.
If it turns out to be a major transmission issue, Is it worth to overhaul the transmission on this 98 civic… I commute 80 miles everyday//
The shaking happened only once, when there was continuous rain…