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post #1 of 4 Old 03-25-2010, 02:11 PM Thread Starter
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strange noise?

I have just started noticing a strange noise when my truck is shifting through the lower gears when taking off from a dead stop. It is a sound similar to a cars fan kicking in when it is sitting idle. On my truck though, you can only hear it when accelerating, not at idle. It only does this every once in a while and nothing else is out of the ordinary. It hasn't lost any pep, and all of my gauges are normal and no engine lights are on. I would say it only does this about 20% of the time when accelerating from a dead stop. When it does it, accelerating power is the same as well.

Any ideas???
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post #2 of 4 Old 03-25-2010, 09:58 PM Thread Starter
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I really don't know how else to describe it. It almost sounds like you are driving a chevy gas engine in first gear until high rpms, yet the transmission is shifting properly.

I can't figure out how else to describe it.....No other symptoms to give.

95,000 plus miles on my 2004 6.0....only previous repair was the EGR valve.
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post #3 of 4 Old 03-26-2010, 08:38 PM
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I think I'm experiencing the same thing. And yes it's only in lower gears while cruising through the neighborhood. And I can hear it the most when I let off the accelerator. Does yours have a stumbling/clunk sound after letting off the the pedal? Sounds like it's coming from the air intake or turbo area. Anyone have an idea?
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post #4 of 4 Old 03-28-2010, 02:48 PM Thread Starter
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Actually I can only hear mine when I hit the accelerator. I think it is just the fan running very loudly because I just checked my coolant reservoir and it is bone dry. My temperature gauge has stayed cool the entire time so I never really thought it was that.

Question: Can I put regualar NAPA coolant in there until I get some Ford gold from the dealer???
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