Question about 2002 Jeep Liberty

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Hi My jeep cherokee 2.8 crd has knocking sound coming from gearbox in 1st 2nd 3rd 4th and 6th gears. the noise is worse if you lift your foot off the accelerator and let the car slow down. Syncros were replaced 18 months ago.

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  • Anonymous Mar 27, 2014

    My Hyundai atos 2005 started to make a very odd dragging chain noise The noise gets worse when accelerating Once I parked the car there was a rubber type smell coming from the engine a month ago I had a new clutch kit put it Please help

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  • Jeep Master
  • 4,340 Answers

Well, something is broken. I suggest that you get it on a lift, and listen with a Stethoscope and be sure the noise is in the tranny. There is not usually anything good that comes from a noise like you describe. A broken tooth on a gear damages the mating gear and those parts add up fast.

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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What?! Really! The noise goes when the clutch pedal is depressed! So the noise goes when the release bearing (throw-out bearing) is engage? So how would that be a release bearing/clutch problem? If it didn't make a noise until the clutch pedal was depressed, it would be the release bearing! In other words its the input shaft bearing and/or counter shaft bearing in the gearbox. Stop giving people bad advice

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but you are only saying 1,2 and 3......why its not happening in fourth is that the gear ratios that the shafts turn in correlation to thre gearing changes as you get to 4, like on a 10 speed bicycle but in 4th it is a 1:1 ratio, so no excessive loads on the shafts are noticeable....

This will require a transmission overhaul......

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This would be most likely the first noise of a wearing input shaft bearing. It will only get louder, and eventual failure of the bearing will probably mean catastrophic gearbox failure. It stops when you put your foot on the clutch because the gearbox stops spinning then, and it is quiet in 4th and 5th because there is no side loading (as there is in 1st, 2nd, and 3rd) on the failing bearing. It wouldn't matter what sort of car it was, the gearbox should be overhauled as soon as possible.

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This might be because of the gear box problem. By any chance, did your car face flooding? In such cases, please drain the gear box and replace it with new gear fluids. Also, check if you go in low speeds, you might be able to engage it with ease. Please come back to me if you feel this doesnt solve your issue.

Regards,
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Manual gearbox query


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