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1999 4R100 transmissiom oil

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Old 12-29-2010, 07:35 PM
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1999 4R100 transmissiom oil

Hi
I own a 1999 Motorhome on a Ford chassis. 4R100 trany and a V10 6.8l.I know the story of Mercon and MerconV debate . A few year back not to use MerconV in this trany and now a TSB came out and it was OK to use etc. I am planning to change the oil next spring and I am thinking of using Mobil 1 synthetic. Your thoughts Plaese. As far as I know this oil is compatible.

Thank you!
 
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Old 12-29-2010, 08:26 PM
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You'll be fine with M1 ATF. I would try to flush as much of the old fluid out of the system as possible. Use Mark K's method to change the ATF.

Specifications and Approvals

Mobil 1 Synthetic ATF has the following builder approvals: Allison C4

Mobil 1 Synthetic ATF meets or exceeds the requirements of: JASO 1-A and Ford Mercon V

Mobil 1 Synthetic ATF is recommended by ExxonMobil for use in applications requiring: GM Dexron IIIH, GM Dexron IIIG, GM Dexron IIE, GM Dexron IID, GM Dexron II, GM Dexron, Ford Mercon, Voith H55.6335.3X, MAN 339 V1, Volvo 97340 and Volvo 97341
 
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Old 12-30-2010, 06:38 PM
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This needs updating because it was written before Ford changed MERCON V to be compatible.

Mobil 1 synthetic ATF is my first choice.

Changing ATF Fluid in a E4OD and 4R100 transmission .: Articles
 
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Old 12-31-2010, 11:14 AM
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Thank you Mark and dkf. I will go with Mobil 1.
 




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