Hey all....I have an 05 fx4 with the automatic transmission and today it started making a whining noise. Sounds alot like alternator whine but it isnt. i only hear it under acceleration. the problem is definately the transmission. it will not do it in neutral....only while in gear and it will do it through the different gears. I do not have to be rolling down the road.....i pressed the gas pedal while holding the truck still with the brake and it did it then too. shifts fine and doesnt seem to slip. any ideas what the problem might be. truck has 47k miles on it. checked the fluid and it looks great and doesnt have a bad smell to it. any ideas???

 

no clues????? the problem comes and goes. havent heard it for a few days now but it has got me a little worried.

 

i have a 2005 and the same thing

 

Did you guy's find out what the problem is? I have a 05 F150 Screw 4x4 auto trans 133,000 5.4 doing the same thing.

 

no i have not

 

05 supercrew, 70k miles, has had that same whine for some time now. I hear it mostly while driving slow with the windows down and the radio off. No shifting probs.

 

My '05 goes under the wrench today. We believe it to be the TC or the pump. I'll let you know what I find out. Should be in the next day or two.

 

Ok folks my whine is gone. It turned out to be a bearing in the torque converter. Clearly visible when it was remove from the TC and opened. The race was worn on both sides. It was the thin bearing between the turbine and the cover. You can clearly see it in the photo here:http://www.classictrucks.com/tech/08.../photo_04.html

Dang...... there goes my pseudo supercharger!!!

 

tks WRSHOG i have been looking for so long i new it was the torque converter or the valve body

 

wrshog - did the noise go away when the TC locked up?

 

trm122,
No the noise never went away when the truck was in gear. Any gear. The only time it went away was in park or neutral.