I have a 2001 F250 7.3L with the 4R100 trans, around 245k miles on the truck. About a year ago I did a trans fluid flush following the write up by the retired Ford trans engineer who helped design the 4R100. I filled her with the Valvoline Dex/Merc fluid that was on sale at WM. I now learn that while Mercon was originally spec'd for this trans, Ford later changed the spec to Mercon V.
Should I be worried about driving with the current fluid in there? Should I perform another flush and fill with a Mercon V spec'd fluid?
She has the 6.0L trans cooler installed, average temps run around 120-140 F with normal driving and she doesn't tow much. At the moment she is driving and shifting well, no issues.
This is my first post on BITOG, I greatly enjoy learning from/with all of you fine folks!
Should I be worried about driving with the current fluid in there? Should I perform another flush and fill with a Mercon V spec'd fluid?
She has the 6.0L trans cooler installed, average temps run around 120-140 F with normal driving and she doesn't tow much. At the moment she is driving and shifting well, no issues.
This is my first post on BITOG, I greatly enjoy learning from/with all of you fine folks!