I've got a 93 Mark VIII with a 156,000 4r70w in it. J-Modded, and filled with Mercon V by the previous owner. I'm starting to get a little the 3-4 rumble strip phenomenon and I'm considering changing the fluid.
I've heard rumors it's unwise to replace all the fluid in an older transmission as some of the clutch material in the old fluid extends transmission life. I'm guessing this is some garbage but let me know whether you guys think I should flush the whole system or simply drop the pan.
Thanks,
Phil
I've heard rumors it's unwise to replace all the fluid in an older transmission as some of the clutch material in the old fluid extends transmission life. I'm guessing this is some garbage but let me know whether you guys think I should flush the whole system or simply drop the pan.
Thanks,
Phil