It depends.
The problem is that as much as 1/3 of the ATF can get trapped inside the torque converter. Some cars have a drain plug for this but most do not.
If your torque converter does have a drain plug there there is no problem, use it to drain the ATF (and water)
But without a torque converter drain plug The only way to do this is to do a large number of ATF changes, possibly as many as 5!
So this is one of the few cases where I would say you do have to have a flush performed. While there are procedures to do this at home it might be easier for you to have a Quick-E-lube type place to do the work.
But a warning: Some transmissions simply will not survive having water with the ATF. Flushing might give you a few more months but in the end the clutch plates will have to be replaced.
The problem is that as much as 1/3 of the ATF can get trapped inside the torque converter. Some cars have a drain plug for this but most do not.
If your torque converter does have a drain plug there there is no problem, use it to drain the ATF (and water)
But without a torque converter drain plug The only way to do this is to do a large number of ATF changes, possibly as many as 5!
So this is one of the few cases where I would say you do have to have a flush performed. While there are procedures to do this at home it might be easier for you to have a Quick-E-lube type place to do the work.
But a warning: Some transmissions simply will not survive having water with the ATF. Flushing might give you a few more months but in the end the clutch plates will have to be replaced.
