May be a broken transmission mount. My 1988 Prelude S has 4 mounting points for the tranny. One of them was broken and causing the car to shake when shifting into R, D from Park. To check these: set the emergency brake, have someone in the drivers seat with foot on brake and with engine running, take it through it's shift points one at a time...rev at each point, and check for separation within the mount (most noticable when shifting into reverse). If this is the case, you need a new mount. From dealer, these run @ $70 in California.
Good Luck!
If it vibrates briefly only while shifting, it's probably the transmission slipping. If all other gears are shifting ok, you're about to loose the transmission.
The most common cause of a automatic transmission jerking, when shifting, is low transmission fluid. Fill the transmission to the full mark.
could be a worn pinion gear or bad U joint or both
What are the causes and sources of vibration on diesel
there is a slight way if you have a good enough engine and some skill its called power shifting you should google it
Can be old fluids. You should change it every 50,000. -ALL of it, not just the pan. It could have a broken or stuck accumulator.
An automatic transmission might be slow shifting from first to second because of low transmission fluid. You might also have damaged the gears in the transmission at the area between first and second.
Resonance.
noise and frequency are made a vibration
Depends. Most likely cases: On a standard: Poor shifting on the driver's part. On an automatic: Transmission problems, get it checked.
A seized up transmission can cause a Volkswagen Golf with an automatic transmission to not shift and racing RMPs after second. A worn gear can also prevent shifting.
a vibration occurring