Hamquil
New member
First I would like to say that I’ve been searching other threads for this issue for weeks now and the closest thing I can think of is the needle bearing but it doesn’t go away in 4high. Hopefully someone can help me on this because I’m about to go nuts. So a few weeks ago I had a new set general grabber AT2 265/70r17 installed and balanced by Discount Tire and everything was fine for a week with no noise. Then I installed a spacer lift (3” front 2” rear) with a front diff drop and ever since I have experienced a pulsing humming noise mostly noticeable when coasting at low speeds. I went to Just Tires and got an alignment immediately and it made no difference. I went back a week later and had them double check everything and re align it because the caster was low but they couldn’t get it much higher with the stock UCA’s but still no difference with the noise. I then went back to Discount Tire and had them make sure they were road force balanced but still no difference afterwards. Then I installed Spidertrax 1.25 wheel spacers since the tires were close to the UCA’s so I thought it might have been rubbing when coasting but the noise didn’t change. I am only experiencing a noise and not a vibration of any sort. It sounds like a pulsating humming tire running unevenly on pavement type noise but I really don’t think it’s the tires though. Can a low caster cause this? I have made a list with everything I can think of below and any input will greatly be appreciated!
( I have new CV boots/grease and axle shaft seals on order and will tackle that next week and see if that makes a difference)
Cv axle - inner boots are not ripped but leaked a lot of grease immediately after installing the lift so I closed them tighter at the narrow end with hose clamps and that stopped the leakage. The outer boots are fine and have no play.
Front differential fluid - ?
Needle bearing - has a good amount of play and slightly leaking axle shaft seal at driver side (noise does not change when put into 4 high though)
Tires balanced - good
Alignment - low caster at 1.7 roughly on both sides due to stock front UCA’s. Camber and tow are in spec.
Wheel bearings - no play and do not feel any vibrations when touching the coil springs while manually turning the wheels one at a time.
Universal joints - good, freshly greased and no play
Drive shaft - slight angle change at rear differential. Possibly out of balance?
Brake rotors - front are fairly new and rear rotors do need replaced but it does not sound like a warped rotor noise.
Brake pads - all pads are fairly new
Brake calipers - ?
Ball joints - no play
Tie rods - no play
Rear shocks - slightly overextended but not
leaking.
Front struts- good
2005 4.0 V6 SR5 4x4 175,000 miles
( I have new CV boots/grease and axle shaft seals on order and will tackle that next week and see if that makes a difference)
Cv axle - inner boots are not ripped but leaked a lot of grease immediately after installing the lift so I closed them tighter at the narrow end with hose clamps and that stopped the leakage. The outer boots are fine and have no play.
Front differential fluid - ?
Needle bearing - has a good amount of play and slightly leaking axle shaft seal at driver side (noise does not change when put into 4 high though)
Tires balanced - good
Alignment - low caster at 1.7 roughly on both sides due to stock front UCA’s. Camber and tow are in spec.
Wheel bearings - no play and do not feel any vibrations when touching the coil springs while manually turning the wheels one at a time.
Universal joints - good, freshly greased and no play
Drive shaft - slight angle change at rear differential. Possibly out of balance?
Brake rotors - front are fairly new and rear rotors do need replaced but it does not sound like a warped rotor noise.
Brake pads - all pads are fairly new
Brake calipers - ?
Ball joints - no play
Tie rods - no play
Rear shocks - slightly overextended but not
leaking.
Front struts- good
2005 4.0 V6 SR5 4x4 175,000 miles
