Transmission Slipping
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Junior User
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Transmission Slipping
I am taking my 08 f150 x-cab fx4 5.4 in for inspection next week and I want the dealership to check out my transmission. When it down shifts from 3rd - 2nd, sometimes the tranny winds up or surges than down shifts. Other times when I am accelerating slowly, the transmission slips between 2nd & 3rd gear. But nothing under hard acceleration. It doesnt do it all the time, just once and a while. Has anyone else ever experienced this?
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Junior User
Joined: Sep 2008
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2008 ford f150 5.4 x-cab fx4 model
25,500 miles-100% stock, no mods
Never had the fluid changed, havent check the fluid though, might be a good idea. Somewhere i think i remember reading there is a TSB on this, not sure.
25,500 miles-100% stock, no mods
Never had the fluid changed, havent check the fluid though, might be a good idea. Somewhere i think i remember reading there is a TSB on this, not sure.
Postmaster
Joined: Nov 2006
Posts: 2,807
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From: The Woodlands, TX
not too sure on the TSB, a fluid change is required at 30,000 so that might be a good idea. I would check the fluid and then start from there. There might be a reflash available for your truck to help with the shifts (not too sure tho). Take it to the dealer as you are still under warranty.
Cargo Master
Joined: Aug 2002
Posts: 2,117
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From: Over Yonder, MN
Have them flash the PCM with the newest update, my 08 did the same thing and so did a number of others; it's something goofy in the programing that they fixed, there's a TSB for it.
http://ww2.justanswer.com/uploads/ti...sb08-14-03.pdf
It says up shift, but mine did it mostly on down shifts.
http://ww2.justanswer.com/uploads/ti...sb08-14-03.pdf
It says up shift, but mine did it mostly on down shifts.
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