It should not be very critical. Maybe the previous owner has not maintained the car very well. The transmission oil should be changed every 2 years. Go to the dealer and ask them to check it when changing the oil.
Normally they will tell you what is wrong and its cost before they start repairing anything.
请帮忙看看, 缓慢加速时，车会出现"GE DEN"一下抽搐，发生渐多，刚买没发觉，平时车抖动较厉害。请教会是多大问题？(97escort)