6.7 with Ford 6R140 transmission
Can you change the fluid in this tranny DIY like you could the old 5R by draining the pan then disconnecting the cooler lines, starting the truck and drain and fill at the same time to remove the rest...
Forum Discussion
philh wrote:brooks379 wrote:
Thanks for the info.....Hot Flush.
I always understood Ford recommended to never add anything to the 6R140 transmission except Mercon LV...... No friction modifier... No additives ?
I could have sworn Ford required a friction modifier additive during a trans fluid change. I don't have access to the service manual, but check with a dealer.
You may be thinking of the limited slip axle. It is added to the gear oil.
