Hi all, I will be getting a 2004 Mercury Grand Marquis LS, 155,000 miles, automatic from my best friends Mom. I don't know if the mileage is too high to replace the transmission fluid and filter. Also, is it ok to replace the differential fluid with that high of a mileage if it's never been touched? I'm going to run the CR505 fuel system cleaner and oil cleaner too. If anyone wants to throw in suggestions about what other wear items, fluids, filters that might need to be replaced at this mileage, please share. Thank you so much.
I don't know if the mileage is too high to replace the transmission fluid and filter.
This is covered extensively in the FAQs .
is it ok to replace the differential fluid with that high of a mileage if it's never been touched?
Yes.
If anyone wants to throw in suggestions about what other wear items, fluids, filters that might need to be replaced at this mileage, please share.
All things made with rubber such as tires, belts, hoses and brake lines, they should be inspected.. check the brake fluid and coolant. Most of these things are also covered in the Learning Centre under 'Maintenance'.
