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Member
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Join Date: Aug 2010
Location: Lake City, FL
Posts: 255
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Member
Join Date: Aug 2010
Location: Lake City, FL
Posts: 255
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When diagnosing a hum, i try and hear if its a wave interference hum or a single note hum. Wave interefence is the tuning a guitar effect open string and fifth fret on string below. two notes fighting for the same wavelength. Its the wuuuuuuuu wuuuu wuu wu wu wu wu effect. pulses faster then slower. Like a bell curve.You can pick it up on airliners when they engines rpms match up.
This is one of those hypersensitive sounds only you can hear from your truck as your used to it, but its there. Its usually tire noise, and some component holding them on track, is slightly allowing them to run up and down some scale of "WRRRR" when it gets close to another tires' "WRRRR" noise you will hear it however not usually under 30mph for me.
Wave interference is almost impossible to track down in one sitting, I rotate my tires fairly often to avoid just such a thing as I cant unhear a rattle or a hum. Even treads minimize previously mentioned "WRRRR"
Make sure its not this, then slide underneath your truck and start striking stuff with a rubber mallet and look for loose parts. Especially since you just changed out all kinds of parts, Put a wrench on every bolt you touched during the improvements, LUG NUTS are in this group of must checks.
Then google some common noises. Bad wheel bearings (MY BEST GUESS if its not tire noise) Rear End Going bad, U-Joints Failing, Transmission Whine, Torque converter bad etc. Happy Hunting
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97 Limited 4x4 218,000 3.4 V6 4.88's E-Locker, Arb Locker 295/70r17 Nitto Trail Grapplers, Custom rear bumper, 06 Sequioa Wheels, Toytec Ultimate 3.5 Lift OME 891's Bilstein 5150's 4crawler 1.5" body lift, Spider Trac 1.25 spacers,ODL bumper, PIAA 520 and 510 SMR's, Taco Whip Mod,Pioneer Head Unit, Satoshsi grille
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