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Transmission questions for an 05 F150

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Old 02-06-2009, 10:15 AM
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Transmission questions for an 05 F150

I want to change the transmission fluid on my 2005 5.4L this weekend. I plan to drop the pan, change the filter, and use this guide to flush the fluid. It's my first time changing ATF, but I do all of my other maintenance and don't think it will be a big deal. However, I have the following questions.

1. What transmission do I have and how many quarts of ATF does it hold? I believe it's the 4R75E, but there's nothing I've found on the door or under the hood to confirm.
2. Is it worth it to switch to AMSOIL? I do very little towing, mostly city driving. My gut says that at 2 to 3 times the price, it's not worth it.
3. If I don't switch to AMSOIL, do I go with MERCON or MERCON V?

Yes I know this has all been talked about, but when I searched, I got a lot of conflicting results. Thanks.
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Old 02-06-2009, 07:14 PM
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On the data tag in the driver's door opening there is a TR. Under that is a letter. As I remember B means 4R75E, which is what I believe is in your truck.

I don't remember the complete fill for that, I think it should take about 15-16 quarts to do the flush.

You'll also find that the cooler lines are one above the other, not front and rear. Someone should be along shortly that knows which one is in and which one is out. I don't know.

Use MERCON V, do NOT use MERCON. I'm not a fan of Amsoil. I like Mobil 1 synthetic ATF. Any fluid that is MERCON V rated will be fine.
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Old 02-07-2009, 10:11 AM
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Thanks Mark, and thanks for the great guide.

Does it matter too much which cooler line I use? I remember a thread a while back discussing that it really didn't matter which line on the 4R70. Is it the same way on the 4R75?
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Old 02-07-2009, 02:44 PM
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It does matter. The fluid flows in one direction. If you remove the wrong one nothing comes out of the cooler line, it will come out of the fitting on the trans.
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Old 02-08-2009, 08:26 PM
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Thanks for the help.... after some minor spills and NAPA selling me the wrong filter, I finally got the filter changed and flushed the trans.
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Old 02-08-2009, 10:56 PM
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The 4R75E takes 14.9 quarts, just like the 4R70W. The 4R75E is essentially a 4R70W with a Turbine Speed Sensor.

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Old 02-25-2009, 01:00 AM
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Check out this Independent comparison between Amsoil ATF and MerconV
http://www.goodsenseoil.com/2007_sept_ATF_merconv.pdf
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Old 03-01-2009, 04:04 PM
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so how is it feel from now?
smooth?
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Old 03-05-2009, 05:22 PM
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how many miles are you at? I have been told that over servicing the tranny is not good...100k intervals is all you know...I had mine flushed at 63K and it went at 67k...no warning signs at all
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