Trans fluid?
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Senior User
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From: Paola
Trans fluid?
I have a 2000 expedition with the 4r100. Certified transmission put a remanufactured trans in it last year. I added a trans cooler today and was going to add some fluid but wasnt sure if I needed to add mercon or mercon V. The dipstick says mercon, so I called certified transmission and they said the put peak full synthetic multi vehicle atf in it and just to use that. I looked up the peak full synthetic and it said not for use where mercon V is required. Guess im stuck using that now?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,696
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From: SE Florida
Maybe they know what they are doing. But I would NEVER put that fluid in a 4R100. The only Ford spec that it lists is MERCON SP. MERCON SP will kill a 4R100. Source: PEAK ATF Spec Sheet.
Hotshot
Joined: Jul 2005
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MERCON® SP Automatic Transmission Fluid
Motorcraft® MERCON® SP is a premium-quality fluid recommended by Ford Motor Company specifically for use in Ford, Lincoln and Mercury vehicles that require MERCON® SP type fluid. This product also provides excellent performance in electronically controlled automatic transmissions. Check Owner’s Guide or Workshop Manual for correct applications
Motorcraft® MERCON® SP is manufactured with premium base oils and specially designed performance additives, which provide excellent shifting characteristics at high and low ambient temperatures, excellent thermal and oxidation resistance. It provides wear protection and inhibits the formation of gum, sludge, lacquer and foam. It also provides protection against rust and corrosion. MERCON® SP is friction modified for smooth transmission operation while guarding against transmission shudder
Do not use in transmissions requiring MERCON® V, MERCON® LV, Continously Variable Chain Type Transmission Fluid, Motorcraft® Premium Automatic Transmission Fluid, FNR5 Automatic Transmission Fluid, or Type F Fluid
Refer to the Motorcraft® MERCON® SP product data sheet at the link below for additional information. For MSDS information call 1-800-448-2063
Motorcraft® MERCON® SP is a premium-quality fluid recommended by Ford Motor Company specifically for use in Ford, Lincoln and Mercury vehicles that require MERCON® SP type fluid. This product also provides excellent performance in electronically controlled automatic transmissions. Check Owner’s Guide or Workshop Manual for correct applications
Motorcraft® MERCON® SP is manufactured with premium base oils and specially designed performance additives, which provide excellent shifting characteristics at high and low ambient temperatures, excellent thermal and oxidation resistance. It provides wear protection and inhibits the formation of gum, sludge, lacquer and foam. It also provides protection against rust and corrosion. MERCON® SP is friction modified for smooth transmission operation while guarding against transmission shudder
Do not use in transmissions requiring MERCON® V, MERCON® LV, Continously Variable Chain Type Transmission Fluid, Motorcraft® Premium Automatic Transmission Fluid, FNR5 Automatic Transmission Fluid, or Type F Fluid
Refer to the Motorcraft® MERCON® SP product data sheet at the link below for additional information. For MSDS information call 1-800-448-2063
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From: Paola
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,696
Likes: 2,617
From: SE Florida
I would. Or if you want to do it yourself: https://www.ford-trucks.com/articles...-transmission/
More Turbo
Joined: Jun 2014
Posts: 749
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From: Pagosa Springs CO.
I have a 2000 expedition with the 4r100. Certified transmission put a remanufactured trans in it last year. I added a trans cooler today and was going to add some fluid but wasnt sure if I needed to add mercon or mercon V. The dipstick says mercon, so I called certified transmission and they said the put peak full synthetic multi vehicle atf in it and just to use that. I looked up the peak full synthetic and it said not for use where mercon V is required. Guess im stuck using that now?
Is might be still under warranty.
I bought a certified 4r70w last fall, they put peak full synthetic, about 20k miles no problem.
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Senior User
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From: Paola
I called certified transmission and asked about the peak synthetic and it not being compatible with mercon or mercon V applications. They said the 4r100 was on their list of approved applications. When I looked up the specs again I noticed the application list from 2013 didnt list mercon or mercon V but the list from 2016 lists Mercon but specifically says not for mercon V.
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