Howling noise. Torque Converter Howl?
#1
Howling noise. Torque Converter Howl?
When you take off from a dead stop and going very slowly, the engine compartment has a loud howling noise... it almost sounds like an air dryer in a car wash with air rushing fastly. Also, there seems to be minimal power when it does this.
I am thinking it could be torque converter howl. The tranny fluid is good. Its definaely not diffs or transfer case.
Any ideas?
I am thinking it could be torque converter howl. The tranny fluid is good. Its definaely not diffs or transfer case.
Any ideas?
#3
I have this too, it only happens every now and then so not enough for me to repeat for a someone else to figure it out. It just sounds like the fan spools up really high and there's a complete loss of power and then when you slow back down to idle the sound goes away and the power comes back.
#4
I have this too, it only happens every now and then so not enough for me to repeat for a someone else to figure it out. It just sounds like the fan spools up really high and there's a complete loss of power and then when you slow back down to idle the sound goes away and the power comes back.
Thx!
#5
#6
I'm pretty positive its the fan on mine, but it does it during the winter too. So it could be about 20 degrees when it first started last winter, but it's been fine today and its close to 108 outside, so I still have no clue what causes it haha.
#7
Yep, definately the fan. There is a thread on here called Fan Noise. I might have something wrong with the fan clutch, but need to look into it. Some people said its just plain loud when it is hot out. But I can't imagine designing something this loud.
Torque convertor? Man, I was way off!!
Thx for the help guys!
Torque convertor? Man, I was way off!!
Thx for the help guys!
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Join Date: Feb 2006
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My '03 7700 has done this since new, when the cooling system is stressed (high outside temp, AC on, working the motor hard). I've always assumed it was the fan clutch fully engaged for max cooling, and possibly the computer changing the ignition timing to help cool the motor.
It happens a little more frequently lately, probably because the radiator doesn't cool as efficiently as it did when new (160K on it now).
It happens a little more frequently lately, probably because the radiator doesn't cool as efficiently as it did when new (160K on it now).
#15
My '03 7700 has done this since new, when the cooling system is stressed (high outside temp, AC on, working the motor hard). I've always assumed it was the fan clutch fully engaged for max cooling, and possibly the computer changing the ignition timing to help cool the motor.
It happens a little more frequently lately, probably because the radiator doesn't cool as efficiently as it did when new (160K on it now).
It happens a little more frequently lately, probably because the radiator doesn't cool as efficiently as it did when new (160K on it now).
It was rather hot and humid when I noticed the sound most, so I am thinking this is just the way it is (my '98 4.6 never did this). I am going to flush the cooling system this weekend just in case.
This 7700 5.4 is still new to me, so I guess I am just getting used to it.
Thx for all the help guys!