crazy sound from front of car when in 4wd
#1
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Year: 1988
Model: Wagoneer
Engine: 4.0
crazy sound from front of car when in 4wd
if i engage 4part time or full time, I get a crazy sound from the front of the car.... a have a d30 in the front with lockright lockers. the sound is only therre when i give it gas and the car pulls to the left when driving in 4wd...
the sound is a mix of a thumping and whining.... and I only hear it if i engage the 4wd.... what could this be?
the sound is a mix of a thumping and whining.... and I only hear it if i engage the 4wd.... what could this be?
#4
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Year: 1988
Model: Wagoneer
Engine: 4.0
i checked the diff oil and its good..... all the u joints seem good as well, except the one from the tranfer case to the front axle, it seems a bit loose? is it supposed to be like that or could that be my problem?
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
moby do you have a vacuum disconnect D30. Sounds like the disconnect on the passenger side. there is a shift fork and they get sticky and hard for the vacuum motor to move so it may be halfway in and halfway out. Worth checking.
#7
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Year: 1988
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im thinking maybe an axle is bent very slightly? or something in the diff is really broken? when its in 4wd it squeeks and the front wheels are getting power but its like something is forcing that shouldnt be... making the awfull sound!
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#8
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Year: 1988
Model: Wagoneer
Engine: 4.0
after reading a bunch im pretty sure the sound is a u joint.... either from the tc to the front axle or drivers side wheel.
what is the best way to check a ujoint?
I know they have been replaced at least once since they are the greasable version....
If i need to replace, can I do it myself with basic tools?
Thanks!
what is the best way to check a ujoint?
I know they have been replaced at least once since they are the greasable version....
If i need to replace, can I do it myself with basic tools?
Thanks!
#9
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
after reading a bunch im pretty sure the sound is a u joint.... either from the tc to the front axle or drivers side wheel.
what is the best way to check a ujoint?
I know they have been replaced at least once since they are the greasable version....
If i need to replace, can I do it myself with basic tools?
Thanks!
what is the best way to check a ujoint?
I know they have been replaced at least once since they are the greasable version....
If i need to replace, can I do it myself with basic tools?
Thanks!
#10
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Model: Cherokee
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You will need a vice or a press to get them out and back in. I have seen it done on the trail with a C clamp. We are talking about axle u-joints here. The driveshaft is much easier but will still need to press in one side with the same tools vice, press or C-clamp. There may be other suggestions on methods to change them but I have never seen any.
Blue... how about suggesting he look at the tech section here. I'm fairly sure there is a write-up there about changing them.....
Moby, If your axle was bent you would hear the noise all the time. Because you have the NP 242(full-time), the front axle shafts spin all the time. So does the front drive shaft. The 242 uses a center axle disconnect style of engaging the 4wd. The clunking sound you describe certainly sounds like a U-joint gone bad. When you have no power being delivered to the front, the shafts spin but make no noises. When you add the power, then the clunking appears.
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Year: 1988
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#13
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well after changing ujoints on the front driveshaft the sound is still there!! maybe its the ujoints on the axle to the wheels? before I change them, how can I check to see if they are bad first?
#14
my friend had the same problem on his jeep with the 242. i watched underneath and thought it maybe the pinion on the axle. but then under closer inspection found that the exhaust pipe bracket was broken and the pipe was rubbing the driveshaft. just a thought on something else to check
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Year: 1996
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And the easiest way to remove your wheel hub: put a stubby 3/8" drive extension between the hub and the yoke on the axle shaft. Turn the wheels to the left, insert extension, turn the wheels to the right, and listen for the pop. Then pull the shafts and get to work.