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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Transmission Flush

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Old Sep 7, 2019 | 04:06 PM
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Rudiak
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Transmission Flush

I have a 2008 F250 6.4 4x4 and had the transmission flushed/filled by dealer at 90k. I do not have the external filter and the internal filter was not changed they said it was lifetime. The transmission has been flawless. The truck now has 185k. Should I get another flush/fill done? Your knowledge, experience, and opinions are welcome. Thanks!
 
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Old Sep 7, 2019 | 08:24 PM
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Mark Kovalsky
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The dealer is wrong. The filter in that trans is NOT lifetime. You should change the fluid and the filter.
 
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Old Sep 9, 2019 | 04:00 PM
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Mark K I read a previous post of yours from 2014 where you said the filter is lifetime. Same thing my Ford SA said at around the same time. What gives?
 
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Old Sep 9, 2019 | 08:19 PM
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Mark Kovalsky
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Before 2008 the filter was lifetime. Sometime after 2008 production started the internal filter was changed to a greatly improved filter. That filter has a regular change interval. If your truck does not have the external filter you have the improved filter and it needs to be changed.
 
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