For a few months I have noticed an occasional slip when starting from a standing stop. A release of the accelerator and reengaging will stop it. Lately I have also noticed a noise that sounds like aggressive tires on asphalt if cruising 40-50 and again in the 70's. If I accelerate thru the gears it does not appear until cruising at 70+ or decelerating. The noise seems to be coming from the front end of the truck. Very occasionally it will also give hesitation when accelerating at the same 40 mph. I have not noticed any spike in rpm during any of these events.
2005 f150 king ranch 2wd. v-8, auto trans. 140,000 miles. bought used 2 years ago.

 

Hi and Welcome.

Sounds like misfires.

Whats the maintenance history?

2005 3V's also have injector issues - yer out of the Injector Letter coverage period - but it's still a possible concern: http://ww2.justanswer.com/uploads/sd...229_r07m08.pdf

Get codes pulled - even if no CEL is set there may be stored codes.

BTW - a little 'hi', 'please' and' thank-you' goes long way .... simple courtesy.

good luck

MGD

 

Thanks for the information. I had the codes checked and there were no codes stored. I have some records from original owner. He had transmission flush at 49,000 miles. Differential service at 71000 miles. Fuel system cleaner at 76000 and got a quote on tune up with plugs, spark plug tube, and fuel filter. I don't have invoice that it was done. No records after 80000 miles ( second owner). I bought it with 98000 miles. Only oil change since I have owned it.
I appreciate the help.