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Old 08-15-2019, 05:47 PM   #1
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4R100...what is the proper fluid?

So I want to change the fluid and filter on my 1999 F53, 4r100 transmission and have been attempting to determine the proper fluid for the last hour. Mercon V! No Mercon V, it will ruin your transmission. Dex/Merc. Valvoline Max Life. Mercon SP....and so on. I didn't realize the determining the proper fluid would be such a chore. Does anyone have any insight? Thanks.
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Old 08-15-2019, 05:52 PM   #2
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The Official Ford manual says MERCON ATF.. I think its been replaced by something else. However, I use Valvoline ATF Synthetic. About $18 a gallon at Walmart.

I needed 5 gallons to do a full flush when I replaced the filter.

F53 Transmission filter change and flush – 1999 Southwind 35S

I also use the Valvoline ATF it in the Power Steering system and my leveler jacks. I also use it in my 2017 and 2006 Toyota Camry and my 2013 Hyundai Sonata. I also used it in my 2001 Mirada (4R100 trans)
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It won't do MACH 2, but I can get a sandwich and take a pee.
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Old 08-15-2019, 06:51 PM   #3
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The proper fluid is Mercon V.
It is about the only one that will not hurt your 4r100 or E4OD.
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Old 08-15-2019, 07:06 PM   #4
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I had to figure this out as well, I have the same trans in a f250. Anyways the original fluid would be just standard dex/Merc. But mercon v was reformulated to be backwards compatible with the 4r100. I put mercon v in mine years ago, put on thousands of miles, mostly towing at Max capacity, and it's been great.
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Old 08-15-2019, 10:27 PM   #5
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FORD did officially change the recommended replacement for MERCON TO BE MERCON V, AND CEASED production of MERCON in July 2007.
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Old 08-16-2019, 07:23 AM   #6
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https://www.aa1car.com/library/ford_tsb_06144.pdf
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Old 08-16-2019, 08:55 AM   #7
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We ran Mobil One ATF in our 1999 E450. It was suitable to replace the Mercon.

Ken
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Old 08-16-2019, 11:36 AM   #8
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The TSB in post #6 seems to be pretty clear that Mercon V is the proper fluid. I read on several other sites NOT to use Mercon V. So confusing.
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Old 08-16-2019, 11:38 AM   #9
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Quote:
Originally Posted by Waiter21 View Post
The Official Ford manual says MERCON ATF.. I think its been replaced by something else. However, I use Valvoline ATF Synthetic. About $18 a gallon at Walmart.

I needed 5 gallons to do a full flush when I replaced the filter.

F53 Transmission filter change and flush – 1999 Southwind 35S

I also use the Valvoline ATF it in the Power Steering system and my leveler jacks. I also use it in my 2017 and 2006 Toyota Camry and my 2013 Hyundai Sonata. I also used it in my 2001 Mirada (4R100 trans)





Waiter21,


Is this the fluid you used? The way I read it, it doesn't show to be compatible with Mercon V.


https://www.walmart.com/ip/Valvoline...RoCcgEQAvD_BwE
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Old 08-16-2019, 12:00 PM   #10
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Quote:
Is this the fluid you used? The way I read it, it doesn't show to be compatible with Mercon V.
Yes, according to Valvoline, its compatible.

https://sharena21.springcm.com/Publi...2-ac162d889bd1

There is a note that applies to California. Evidently there is a law in CA that says that if viscometrics doesn't match, then Valvoline cannot claim that its compatible.

I've used this for a couple decades, yes, even in Calif ( I know, I'm a scuff law) . I like it because its compatible with fluids that are specified in my other vehicles, so it makes my life easier as far as keeping a supply of fluids on hand . So far the high mileage has been my 2006 Camry, 300k miles, the tranny fluid got flushed about every 75k miles. I was happy to see that its also compatible with my new-to-me 2017 Camry (Toyota WS fluid). I just did a filter change and flushed it using Valvoline ATF Synthetic.
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Old 08-16-2019, 12:31 PM   #11
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Quote:
Originally Posted by Fugitive861 View Post
The TSB in post #6 seems to be pretty clear that Mercon V is the proper fluid. I read on several other sites NOT to use Mercon V. So confusing.
Those unknown sites do not know what they are talking about.
Obviously you are not talking about the Ford Truck Enthusiasts Forums.


I use Mercon V in all of my Fords with no problems.


Nobody has made MERCON since 2006. MERCON V replaced MERCON. Get over it.
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Old 08-17-2019, 11:26 PM   #12
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(The way I read it), the MERCON LV is NOT compatible w/ MERCON OR MERCON V, BUT MERCON SP is Ok, just has extra additives... boy, their VALVOLINE ATF LABELING/ NAMES SUCK/ CONFUSING https://www.cartechbooks.com/techtips/autotransfluid
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Old 08-17-2019, 11:30 PM   #13
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i WAS ALSO PREVIOUSLY CONFUSED over brake fluid (Dot-3 vs DOT-4 vs Dot-5 vs Dot 5.1?) Takes some study
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Old 08-17-2019, 11:35 PM   #14
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Proper Valvoline PRODUCT for MERCON/ MERCON V Applications = https://www.valvoline.com/our-produc...v-applications
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