What causes a hummmm...

98XJSport

Destiny is the rising sun

Location

Western Maine

• May 4, 2009

• #1

I have a 98 XJ, lifted etc. Ive been chasing down a hum from my front drivers side tire since last summer but cant figure out where it's coming from.

Ive tried:
Wheel bearing
Axle U-Joint
Brake Pads
Rotors
TRE
Alignment last year.

What else could cause a oscillating hum at 45+MPH? Im probably going to try ball joints next cause they are getting close to 100K on them for all know. Maybe control arm bushings too...

 

joe_peters

NAXJA Forum User

Location

Grants Pass, OryGun

• May 4, 2009

• #2

Jack up the front end.

Observe the tire tread from the front, spin tire and see if the tread is true.

 

M

MAY POP

NAXJA Forum User

Location

Lake in the Hills Il.

• May 4, 2009

• #3

It hums because it doesnt know the words.

 

Smittty9785

NAXJA Forum User

Location

SE Portland Oregon

• May 4, 2009

• #4

a humming bird hummmmms

 

Y

yjkrawlerboy

NAXJA Forum User

Location

Utah

• May 4, 2009

• #5

Remove your front driveline and see if it goes away.

 

98XJSport

Destiny is the rising sun

Location

Western Maine

• May 4, 2009

• #6

Forgot to mention I rotated the tires, didnt help.
Might be a hummingbird, never know what might get caught under the tires. Pulled a sparrow out of the grill once...

Might try to pull the front driveshaft, will probably leave the axle though Not sure that a drivesaft vibe would transfer out to sound like one wheel though?

 

Smittty9785

NAXJA Forum User

Location

SE Portland Oregon

• May 4, 2009

• #7

ring and pinion....

 

Shorty

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

on the beach in Ocean View, VA

• May 5, 2009

• #8

does the sound change or stop when you are turning? It could be side (spider) gears or bearings in the front differential.

 

98XJSport

Destiny is the rising sun

Location

Western Maine

• May 7, 2009

• #9

It might change in loudness as I go around a corner, which might be pointing to the differential bearings...

 

98XJSport

Destiny is the rising sun

Location

Western Maine

• May 10, 2009

• #10

Well there is no growling when I accel or decel, so Im not suspecting pinion bearing. I pulled the front driveshaft, no difference. Will be rotating tires again tomorrow, that seemed to improve things for a bit last time, maybe something is causing them to wear strangely on the drivers side?

 

98XJSport

Destiny is the rising sun

Location

Western Maine

• May 12, 2009

• #11

Swapped the tires around, made it a little less loud but not really much of a difference. Also put the front passenger tire up in the air and it spins freely, so its not like the axle is partially locked or anything.

Any other ideas out there?