ZF6 Fluid change - Ford Powerstroke Diesel Forum

 
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post #1 of 4 Old 05-03-2012, 02:06 PM Thread Starter
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ZF6 Fluid change

Going to be changing the fluid on my 03 zf6 this weekend. Owners manual calls for mercon ATF? Manuals ive had before have usually called for a gear oil, is this right? Are there any better alternatives to just regular atf that would be okay in this trans? Also some one was telling me that the easiest way to refill the trans is through the floor in the cab, is this true? I was planning on just using a hose and fluid pump through the fill hole.

2003 F350 7.3 Reg Cab ZF6 4x4
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post #2 of 4 Old 05-03-2012, 06:06 PM
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Gear oil is bad news. The zf-6 is built for ATF and has an internal oil pump that will be damaged if you put heavy weight oil in it. I use Mobile synthetic ATF and it's great.
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post #3 of 4 Old 05-03-2012, 06:16 PM Thread Starter
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okay good to know. I just assumed it was a standard gear box and found it weird that it was taking ATF.. do you know about how many quarts a fluid change takes? Since it has a pump is there a filter?
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post #4 of 4 Old 05-04-2012, 01:39 AM
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5.8 qts just did mine with mobile atf synthetic



"BIG RIG" auto to zf6 swap 00 f-350 cclb dually,4in rough country lift, 6637, 7in mitre stacks, wicked wheel, foil delete,live tuned from bill at php,triple pod autometer gauges,315/75r16 kelly tsr's, 05 front end conversion, 2in spacers for rear,stage one swamps 175cc single shots,boost fooler, kennys dual disk clutch.
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