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Discussion Starter #1
Since I dont know the history of my transmission what type of fluid would you recommend ?

How bad would it be if I mixed the two unknowingly?


Oreillys computer said Mercon LV but I thought it was Mercon V.
 

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Mercon LV. Should probably change the filter too
 

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It is NOT Mercon V.

I get the Mercon SP, but LV works also. Even the Valvoline MaxLife has proven to work.
 

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Ford has gone back and forth a couple times on this, but i'm with @bismic and use Mercon SP.

-jokester
 

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Ford never went back to SP for the 5r110 but they did revert for a few other applications and that's why they never phased it out like intended

but they did not suggest mixing SP and LV right away then they came around to approving


a lot of guys use the Valvoline High Mileage SV/LV fluid (it is not a Mercon approved fluid just Valvoline suggested replacement )
 

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They are back to recommending LV again but the SP has treated me good for 15 years so I'm going to continue to use it


Sent from my SM-G960U using Tapatalk


You're not supposed to mix them though
 

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our service interval is a lot less with the SP than with transmissions that had LV as the original fill

you have to wonder if any of that is fluid related ? or all the filter type ?
 

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Personally I believe it is the 100% filtration.
 

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Discussion Starter #10
So my tranny pan has a drain plug in it so Im going to just drain that out for now and refill it.

Approximately how much fluid will I need?
 

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So my tranny pan has a drain plug in it so Im going to just drain that out for now and refill it.

Approximately how much fluid will I need?
8 qts

I do a series of 3-4 drain and refills every 30k miles (I drive it enough to get the fluid hot and have enough time to mix in between each drain and re-fill). It has been good for 215k miles.
 
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