after driving and stopping repeatedly, transmission will slip and transmission fluid becomes pink
Have the radiator replaced asap the water from the radiator is mixing with the oil line
Replace the radiator An automatic transmission is cooled by passing the transmission fluid through passages inside the radiator. There is a leak in this passage. This leak is internal and can not be repaired. The radiator must be replaced. Do this ASAP. I would not drive this car until the radiator is replaced. You are on the verge of destroying your transmission. When this happens, it will cost more money to replace the transmission than this old beater is worth. You could buy another old Honda that is a few years newer for what it would cost to have the transmission replaced. A new radiator would cost a fraction of this amount.
There is NO way if the transmission is a manual. An automatic on the other hand, has an oil cooler section that is inside the radiator. It is possible for the oil cooler section in the radiator to develop a leak. Look at the radiator, and you will see the two oil line connections as well as the two radiator hose connections. It is likely the oil will get into the coolant as well. Whichever system has the higher pressure will leak into the other when the engine is running. When the engine is not running, gravity will drain water into the transmission. Water in oil causes it to lose the lubricating properties, which can end up with extensive damage to mvoing parts that rely on oil for lubrication.
