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2002 350 SD loud fan-like noise and occasional whine

8285 Views 12 Replies 6 Participants Last post by  Hoss350
Howdy all,

I have a 2002 F-350 turbo diesel, 4x4, crew cab, long bed, dually with just over 180k miles on it (this week as it gets driven a lot)- 50% of the milage heavy towing. So far so good except for the loud fan-like noise I am now hearing and the occasional whine from underneath. I can still drag a stock Cummings like it was a trailer provided there is enough traction and drift (yes DRIFT) the truck on most corners coming home from work. /ubbthreads/images/graemlins/laugh.gif

The fan-like noise can happen warm or cold but always when asking the truck to move. Never stationary. At first I considered the cooling fan on the engine- but that should not be kicking in when it is just started up and put into motion. It is also something I can’t quite see while rolling down the road.

Sometimes, I can nearly complete a 30 mile trip and never hear the sound only to have it kick in as I start moving again at the stop sign down the street from my house. Occasionally, it seems a little hesitant to shift (only when fan sound is already present) and if I keep pushing down on the accelerator I get a terrible whine. The whine will go away as soon as I let up on the accelerator or the transmission up-shifts.

Please tell me this is a cheap fix! The truck already ate a starter, an alternator and 2 batteries this winter! All these parts were original equipment but still not easy to suck up in such a short period. I know I am doing very well for the (mileage) life I have gotten out of the transmission and the harsh treatment it has gotten throughout its pretty short life.

It is getting time for an oil change and a transmission fluid change as well due to mileage. The trans fluid is exactly at the right marks and looks as new as when I put it in, there is no sign of metal flakes in it or even any discoloration or burnt smell- Is a change of the fluid likely to even help or be about $100 wasted that I could put to an upgrade?
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JIM: Thanks for responding..Did my post sound like WOOOooooooooooos to you?? Then a "SHIFT" to DROOOooooooon/ubbthreads/images/graemlins/vulnerable.gif /ubbthreads/images/graemlins/shrug.gif

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for goodness sake, man, stop beating yourself up so badly over all this. The WOOOOoooooos to the DROOOOOOOoooon that you describe is EXACTLY what my fan sounds like when it turns on. Every time. It takes as much a 15 seconds for it to fully engage at higher RPMS, so the sound changes, resulting in the "shift" sound you hear (sounds kinda like a torque converter lockup, right? That is because it is very similar in operation to a TC lockup). You are fine. You didn't hurt anything. Don't worry about it. It is normal. Drive your truck and be happy, I hate to see you get so tore up about this!
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