Trainmaster
Old School Member
It seems to me that the days of transmission fluid changes causing problems are gone. Before synthetics, the old fluid turned to varnish and plugged up leaks. New fluid was highly detergent and opened those leaks.
With today's better oils, that doesn't seem to happen. I've changed fluid in plenty of 150,000 mile Fords with no problem. The stuff I drained actually looked pretty good too. But I just drop the pan and fluid and change the filter. And I always use OEM Motorcraft fluid recommended in the owner's manual. Just did my '08 with 125,000 miles.
With today's better oils, that doesn't seem to happen. I've changed fluid in plenty of 150,000 mile Fords with no problem. The stuff I drained actually looked pretty good too. But I just drop the pan and fluid and change the filter. And I always use OEM Motorcraft fluid recommended in the owner's manual. Just did my '08 with 125,000 miles.