Hey All,
Driving at about 30 mph with steady foot on gas going down a slight decline my truck will rev and then shift into OD. Almost feels like a slip, but, im not under hard power. Just had tranny flushed still have this issue. Has anyone had this problem and was able to pinpoint issue? Thank you.

 

Curious about this as well. My 08 5.4 does the same thing. Doesn't happen alot, but it's still there. RPM increases for about a 1/2 a second before the gear catches. Otherwise, tranny performs flawlessly.

 

Mine is an 08 as well. only 62,000 miles. Hope someone can shed some light on this for use.

 

there is a Tranny re-flash that Ford will do for free (TSB) not sure if you guys have had this done or not....

 

Mine's an 08 with 70K on it. I'm the 2nd owner. The previous owner had most maintenance performed at a local Ford dealer here. Do you think there would be a record of the reflash in the system? Do you remember the TSB number? Does 8-14-3 sound right?

 

From TSB 8-14-3: "Some 2007-2008 F-150 and Mark LT vehicles built between 12/4/2006 to 5/20/2008 and equipped with a 5.4L 3V and 4R75E, may exhibit an engine RPM flare during light acceleration during the 3-4 upshift. This would only occur at road speed ranges from

 

take it in and they will re-flash it for you...had the same problem and it fixed it.. and yes ...they should have a record of it.

 

Thanks for the info guys. I'll give that a shot and hope for the best. Thanks again.