Humming noise at 40mph and at 55mph?
#1
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Year: 2000
Model: Cherokee
Engine: 4.0L
Humming noise at 40mph and at 55mph?
My 2000 Jeep Cherokee makes a humming noise at those speeds. It is only when I push on the gas to maintain speed, no when I accelerate or slow down. Any ideas?
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Year: 1994
Model: Cherokee
Engine: 4.0 High Output
Disconnect your u-joint from the rear yoke and then see if there is any play when trying to push or pull the yoke forward and back. If there is some movement you can try to tighten the yoke retaining nut just enough to eliminate the play. DO NOT JUST TIGHTEN THE NUT ALL THE WAY OR ELSE YOU MAY DAMAGE THE INTERNAL PARTS. Only enough to eliminate the forward & back movement. I just did this to mine yesterday while changing the pinon seal and and installing a sleeve over the yoke seal surface. Just got back today from a 100 mile trip with no leaks or humming.
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Year: 2000
Model: Cherokee
Engine: 4.0L
Disconnect your u-joint from the rear yoke and then see if there is any play when trying to push or pull the yoke forward and back. If there is some movement you can try to tighten the yoke retaining nut just enough to eliminate the play. DO NOT JUST TIGHTEN THE NUT ALL THE WAY OR ELSE YOU MAY DAMAGE THE INTERNAL PARTS. Only enough to eliminate the forward & back movement. I just did this to mine yesterday while changing the pinon seal and and installing a sleeve over the yoke seal surface. Just got back today from a 100 mile trip with no leaks or humming.
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#8
Disconnect your u-joint from the rear yoke and then see if there is any play when trying to push or pull the yoke forward and back. If there is some movement you can try to tighten the yoke retaining nut just enough to eliminate the play. DO NOT JUST TIGHTEN THE NUT ALL THE WAY OR ELSE YOU MAY DAMAGE THE INTERNAL PARTS. Only enough to eliminate the forward & back movement. I just did this to mine yesterday while changing the pinon seal and and installing a sleeve over the yoke seal surface. Just got back today from a 100 mile trip with no leaks or humming.
Last edited by VTSingletrak; 09-14-2009 at 08:38 AM.
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Year: 1994
Model: Cherokee
Engine: 4.0 High Output
That could be many different things. Some things I'd inspect are possible loose u-bolts at the rear axle, bad shocks, bad motor or trans mounts, loose exhaust, bad u-joints? Check for leaks and play at the pinon seal as I indicated before.
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