Transmission Whines when in gear

[Briggskid987]

My 2007 F250 4x4 has developed a whining issue when in gear. First off, the truck is a v-10, 4.10 gears and 4x4 automatic.

The whine sounds very much like a power steering whine or the noise made when you would engage a PTO on a truck.

The truck has 47,000 miles and is stock. It makes the noise only when in gear, R, D, 1, 2, 3. It does not make any noise when in park or neutral. It makes the noise wether the truck is cold, warm or hot. It happens whether going forward, reverse or when I am stopped at a red light..

Truck has not thrown any codes, and drives fine. Fluid is clean, at proper level and smells fine. All my other fluids are fine as well.

Thanks for any help.

[burtco99]

Same problem with my truck.

I have an early (100% bone-stock) 2008 F250 4x4 6.4PS and the 5R110 is making the same noises. The tranny always had a whine that has been barely noticeable until today when it quickly got worse on a 1 hour trip out of town. Fluids are clean and at the full mark. Under very light accel, you can just hear the whine in the cab with windows up, get into the throttle with some enthuiasm and you know something is wrong. Transmission still shifts correctly.

Any ideas on what to look at? I,m going to start with dropping the pan and inspecting the filter for plugging or possible air leakage causing cavitation. beyond that, I need some knowledgeable guidance regarding where to go next.