transmission serviced ?
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Cross-Country
Joined: Jun 2003
Posts: 82
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From: Philly
transmission serviced ?
have a 2008 F150 FX4 with 93K miles - most of my driving is 75% city
last had the transmission fluid flushed(dealership) in 2018 @ 67K miles
is it time to have it flushed again, would like to keep it for another 3/4 years while I save for a new one ?
thanks
last had the transmission fluid flushed(dealership) in 2018 @ 67K miles
is it time to have it flushed again, would like to keep it for another 3/4 years while I save for a new one ?
thanks
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
Blackstone Labs and our own Mark K recommend an oil flush interval of about 30K miles. Doing this routinely according to that recommention should have your transmission living a lot longer than 3-4 years.
Is this a 4R70W?
Is this a 4R70W?
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Cross-Country
Joined: Jun 2003
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From: Philly
owners manual says - 4R75E
Fleet Owner
Joined: Aug 2010
Posts: 21,253
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From: Reynoldsburg, Ohio
I have that same transmission, been just over 60K miles since full rebuild---same 30K transmission flush interval recommended.
More Turbo
Joined: Jul 2003
Posts: 566
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From: SC
Not a fan of flushes. They just push fluid through and don't inspect anything. I prefer to pull the pan for inspection, change the fluid, and do a simple fluid change. Today's fluids can and do last 100K miles. The problem is mostly that the additives in the fluid "wear out". Just replacing the fluid lost when the pan is pulled is enough to freshen up the additives more than enough to last until the next 30K service (What I do) or even a more average 60K mile service. I currently have two trucks with their unrebuilt original 4R's in them. One has 225K miles on it, the other right about 250K. I've been kicking around rebuilding them since a quarter million miles is quite a lot but I just keep changing the fluid and they just keep working.
Didn't help the bigger E4OD in my RV though. The clutches and other internals looked fine and basically like new at 35K miles when the input planet when lightly cruising along at 60 mph. Underbuilt design there but just saying your results can vary and fluid changes can't fix everything.
Didn't help the bigger E4OD in my RV though. The clutches and other internals looked fine and basically like new at 35K miles when the input planet when lightly cruising along at 60 mph. Underbuilt design there but just saying your results can vary and fluid changes can't fix everything.
Logistics Pro
Joined: Oct 2007
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There are different machines for fluid exchange. Some machines flush with pressure . Some machines do not flush. They hook up at your cooling and return lines. The transmission pumps out the old fluid as new fluid is returned. You can also disconnect the cooling line and pump the old fluid into a bucket. Then add fresh fluid from the dipstick tube. Use a five gallon bucket with measurements. Pump out 1 gallon, add 1 gallon. Keep doing it until you see fresh fluid coming out.
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
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