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owners manuel says mercon sp can't find anywhere autozone' o'rielley's don't show anything on mercon sp and owners manuel say's it won't mix with anyother fluids any help would be a great help.
Assuming this is for a Torqshift automatic, Motorcraft Mercon SP and Motorcraft Mercon LV. After the time your owner's manual was printed, both fluids are specified by Ford and can be mixed. (with each other) Couldn't tell you what the difference is between the two is other than price.
Mercon LV is the Ford replacement for Mercon SP in the Torgueshift trans. O'Reillys does show SP as still available in their stores on their web site. They also have LV available, they are interchangeable and will mix with each other. If you can't find Motorcraft brand, be very careful that the fluid you use states Mercon SP or LV compatible.
Here is an early communication on this subject from 2009 which is what we call a Special Service Message or SSM. This jives with the application chart. I have been using LV in place of SP since then, replacing and mixing without any concerns. Looks like an error on the product description to me.
Originally Posted by Ford Motor Company
2976 - REPLACEMENT TRANSMISSION FLUID FOR SERVICING TORQSHIFT TRANSMISSIONS
ALL 2003-2008 F-SUPER DUTY, 2003-2005 EXCURSION, 2004-2008 E-SERIES AND 2006-2008 LCF VEHICLES EQUIPPED WITH A TORQSHIFT AUTOMATIC TRANSMISSIONS SHOULD BE SERVICED WITH MERCON LV AUTOMATIC TRANSMISSION FLUID IN PLACE OF MERCON SP. THIS INCLUDES TOP OFF AS WELL AS FLUID REPLACEMENT. MIXING MERCON LV AND MERCON SP IN THE TORQSHIFT TRANSMISSION IS ACCEPTABLE. USE MERCON LV TRANSMISSION FLUID TO SERVICE VEHICLES EQUIPPED WITH TORQSHIFT TRANSMISSIONS. WHEN ADDING OR REPLACING TRANSMISSION FLUID IN A VEHICLE EQUIPPED WITH A TORQSHIFT TRANSMISSION, USE MERCON LV TRANSMISSION FLUID.
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