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transmission fluid?

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Old

May 11, 2015 | 07:27 PM

#1

casanova76

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transmission fluid?

My Ford is a 2001 f150. 4.6 2wd I just bought couple months ago, Im going to change all fluids, my question is that I have no idea if previous owner ever switc he'd out transmission filter or fluid, truck has 179,000, would it b a good idea?

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Old

May 11, 2015 | 07:41 PM

#2

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

Yes it would. Change it.

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Old

May 11, 2015 | 07:57 PM

#3

brokenleg

Fleet Mechanic

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And it will use mercon 5 and while the pan is off, change the filter.

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Old

May 11, 2015 | 08:16 PM

#4

casanova76

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Ok my other question is that I've heard when a vehicle has lots Miles like this it's best to save the old fluid
n reuse it cause might not shift with new fluid, is that true or just a myth?

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Old

May 11, 2015 | 08:23 PM

#5

steve(ill)

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Not true.... the new oil has MANY addatives and friction modifiers that will help shifting. The old fluid will have suspended pieces of crap that can stick in lines and cause valve problems.... Don't do POWER FLUSH because that can loosen up things laying in the pan and push thru the valves. ........ It is ALWAYS a good idea to drain out old oil and refresh with new. By pulling the pan off you can clean the magnet, bottom of pan, wipe off the valve body and install new filter.

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Old

May 11, 2015 | 08:26 PM

#6

steve(ill)

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the system holds about 13 quarts. When you pull the oil pan you only get about 5-6 quarts drained. There are 8 more quarts in the torque converter and lines. My 2001 ( with 5.4 motor) had a drain plug on the converter. You can turn the converter / motor over with an 18 inch screw driver on the flywheel teeth from the bottom. Look up thru the hole in the housing to see the converter and check for a plug... I don't know if the 4.6 used the same setup or not, but the 2001 w/5.4 had a drain plug.

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May 11, 2015 | 08:30 PM

#7

casanova76

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Alrighty, thanks a bunch fellas ...

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Old

May 11, 2015 | 08:52 PM

#8

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

Quote:

Originally Posted by brokenleg

And it will use mercon 5 and while the pan is off, change the filter.

I wouldn't change the filter. It's not necessary.

Quote:

Originally Posted by casanova76

Ok my other question is that I've heard when a vehicle has lots Miles like this it's best to save the old fluid
n reuse it cause might not shift with new fluid, is that true or just a myth?

That's a myth.

Quote:

Originally Posted by steve(ill)

Don't do POWER FLUSH because that can loosen up things laying in the pan and push thru the valves.

There is another myth. There is no such thing as a power flush. There are flush machines, but they use the transmission's pump to push the old fluid out and the new fluid in. They CANNOT stir up debris any more than a normally running transmission will.

Quote:

Originally Posted by steve(ill)

My 2001 ( with 5.4 motor) had a drain plug on the converter.

All 2001 trucks left the factory with a drain plug in the torque converter.

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