MustangMaker

HELP, PLEASE!
I own a 2008 F150 XLT, 4x4. It has almost 80,000 miles on it, and has been a excellent truck! I have been having problems with the trans. The problem is at Low speeds, like when driving in the city. When the truck shifts from 2nd-3rd, it acts as if it cant find 3rd? If i let off the acclerator completly, it then goes into 3rd gear. Its hard to explain exactly. Imagine if when your gradually acclerating, the truck is in 2nd gear, then about the time its suppose to upshift too 3rd gear, it goes into nuetral instead. I had this problem for quite a while, but in the past it was only once in a while that this would happen. This ONLY HAPPENS, at low speeds, ive noticed. If im hard on the gas, like merging on the expressway, or if im playing in the mud, if shifts fine. Now, its becoming much more frequent! I have and will, always work on my own vehicles. Been around and under alot of cars to know my way around. But, as far as transmissions go, i dont know much! Ive swapped.quite a few, done some clutches, and some trans fluid/filter changes, thats about all though. I am not positive what trans. is in my truck, its a 5.4liter V8, with the trailer tow pkg. Its a supercab also. If theres a typical trans for that motor, thats probably the one! Any help, from anyone, is greatly appreciated!

biggreen_kr

I have that same problem, and I dont want to take it into a stealership. So im interested to hear what people on here have to say.

MustangMaker

Well, i kinda answered my own question. Upon further research there is a fix for this, at the dealership. Its a transmission sotware issue. Do.a search for 2008 Ford F150 TSB

biggreen_kr

Mine is a 2006, does that matter?

techrep

iTrader: (1)

Take it to Ford and have the tranny re-flashed...like stated there's a TSB on this issue

biggreen_kr

Ok. Thanks guys!

viperclaw1

I bought a 2008 f150 supercrew xlt with 5.4l last year and have that same issue. Slow speed, about 26 - 28 mph. it will randomly (often) seem like it slips into neutral for a second or 2 then slams back into gear. Very annoying. Did you ever get your fixed? How?

techrep

iTrader: (1)

There is a TSB that covers this.. A transmission re-flash is required to fix it..

viperclaw1

Thanks for the reply. I asked the Ford dealer about 8 months ago on this and he said this was normal. I looked up the TSB's and looks like there might be a couple that pertains to this. Any idea which is the exact one?