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Old 04-10-2004, 11:12 PM   #1 (permalink)
Mike L.
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It started about 3 weeks ago. I drive my truck about 75 miles and i begin to hear a whining noise (changes with steering wheel turn). The noise becomes constant (i hear it while driving on freeway). I feel it in brake pedal when noise comes in. This noise only happens when i have driven truck 70 miles or more at high speeds (75 mph or more). Anyone else experience this?


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Old 04-11-2004, 11:25 AM   #2 (permalink)
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Mike........I had simililar experiences with mine when it was newer. It happened only on extended drives at high speed during hot weather, but I only noticed it shortly after exiting the freeway.....like at the first turn off the exit ramp. At first I thought it was the transmission, but then I noticed it was connected to the steering and braking.


Now that I have a few miles on it, I have not noticed that noise, but maybe it only does it when the outside temps are higher. I have run those speeds in cold temps for 3-4 hours at a time and I don't recall any whining other than from my passenger........
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Old 04-11-2004, 12:23 PM   #3 (permalink)
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I just drove 1,100 miles from Seattle to Central California. In the upper 80's in CA and I noticed if the AC is running and I slow down quickly, I get a noise that sounds like gears winding down. My thought is I am hearing the AC compressor slow down as RPM's drop. I also noticed if I'm in high idle mode at 1,250 RPM with the AC on, the engine idles really rough. If this continues into the summer, I'm going to have the dealer check the AC system.
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Old 04-11-2004, 08:02 PM   #4 (permalink)
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Had simular experience when getting back onto the fwy when the wheel is turned as I accelerate on the ramp. Thot I was running on tractor cleat impressions on the pavement ~ seem to go away once streightened out and up to fwy speed. BTW, it occurred during a cold snap when passing thru NM & AZ.
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Old 04-11-2004, 08:15 PM   #5 (permalink)
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What does the fluid look like? Smell? I'll have to look and see if my '02 has a P/S cooler (my '97 has one - a steel tube right behind the grill). Sounds like a heat issue, or air (don't see how that could be, though). Might be worth changing the fluid.


I checked mine - no cooler. Removed the P/S dipstick - fluid looked dirty brown and smelled like burned ATF (I have 35K on the truck). I have no idea what the recommended fluid looks like new, but suspect not like that. I think that I need to attend to mine. Wouldn't be surprised if the fluid temp exceeds 230 degrees at times.Edited by: Horse Trainer
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Old 04-12-2004, 08:35 AM   #6 (permalink)
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I have had the same deal, long drive, cruising at 75. Turn the whell lock to lock and it rally whines. Only happened a coupel times.


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Old 04-12-2004, 11:39 AM   #7 (permalink)
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Mike L.


I also get this. It's the same time as your talking about but it's not the power steering pump on mine but rather the turbo spooling down.


See this link:


http://dieselplace.com/forum/forum_p...mp;KW=Mike330R


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Old 04-13-2004, 12:05 PM   #8 (permalink)
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Mike L I get this problem aswell, But I thought it was because my truck is lifted with 37s, but it does happen after long drives in warm/hot weather, but it is only when I turn the wheel lock to lock.
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Old 04-13-2004, 04:17 PM   #9 (permalink)
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I finally took mine in yesterday and had a mechanic drive it. Turbns out he thinks the power brake booster is not working right.





We will see in a day or so ;(


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Old 04-13-2004, 06:52 PM   #10 (permalink)
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Mike330R


I buy that diagnosis. The power steering and brakes work off the same pump. When my noise comes in i can make it louder by depressing brake pedal. I also have noticed my ABS getting a little overactive. This could all tie in. I knew someone here would come up with something.
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