Servicing the transmission on an '04 Excursion - Ford Powerstroke Diesel Forum
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Old 04-14-2012, 08:41 AM Rookie

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Servicing the transmission on an '04 Excursion

According to the sticky on maintenance schedules, the transmission should be serviced at 30,000 miles and every 15,000 miles after that by draining the pan, removing the pan, changing the filter, and reinstalling the pan/new gasket, and filling with ATF. According to the Amsoil website's ATF fluid and filter change procedures, you should also disconnect the oil cooler lines and drain it as well. I'm assuming it is talking about a transmission cooler.

Do the '04 Excursions have a transmission cooler normally? I haven't seen my "new to me" Excursion yet because I'm still in Afghanistan and I'm trying to order everything and have it waiting on me when I get home to do a complete servicing of all fluids and a coolant flush as well. The print out from Amsoil says the capacity is 6.5qts for Initial Fill and 17.7qts for Total Fill which is a big difference and at $8.90 per quart I don't want to spend more than is necessary, so hopefully I'll need the 6.5qts

Also, which brand of transmission filter do you guys prefer?
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Old 04-14-2012, 08:59 AM
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Transmission should be done, I believe, when it needs it. As in fluid is starting to brown slightly, isn't sweet smelling anymore. But, every 45k isn't bad either.
Pan gasket is reusable.
Just use a motorcraft filter.
You should use a flushing machine like Wynn's, just heated. I used the non heated one and, since the 5R110 has thermostat in it to keep it warm enough, introducing cold fluid makes the thermo close and take forever to flush.
Wynn's machines work as such, and so should any transmission machine to safely flush: The machine hooks into a line going to the cooler so that when the truck is running and the TC is pumping fluid, the old fluid goes into the machine, spins an impeller which connects to a shaft which connects to another impeller which pumps in new fluid at the same rate and pressure as the old leaving. It is a 1:1 exchange. The machine does not force new fluid in and old out, but lets the trans do the work. That is the safe way.
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Old 04-14-2012, 12:57 PM
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There are 2 filters, one in the pan and one on the inboard right frame rail up front. You can't miss it, it looks like an inverted Holley electric fuel pump. Depending on the humidity where you live, it could be a bear to remove, if so, anti-sieze the threads before it goes back together. That filter runs about $45 and is a dealer item.

My local O'Reilly's has Mercon SP for $4.50 a quart, the local dealer hosed me for about $7.50 a quart.

That being said, there is a difference between "service" and "flush". Service: dump pan, change filters. Flush: complete fluid renewal, filters should also be done.
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