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manual transmission neutral noise and trying to move forward

stimpy01stimpy01 Posts: 1
edited May 2018 in Jeep
I have a 93 Jeep YJ with a manual transmission, when its in neutral it makes a funny noise and seems to still try and go forward a bit. It shifts fine though all the gears but has this noise when in neutral with the clutch out and is trying to move forward but when I press the clutch in the noise goes away and it stops trying to move. I'm not sure what the problem could be, any help would be great.

Comments

  • thecardoc3thecardoc3 Posts: 4,995
    Does the noise return when in one of the regular gear ratios? It might not be loud but could still be there and be more of a vibration than a noise. It might change slightly when selecting different gears, it also might go away completely when in a particular gear.

    The most likely cause is a failure of one or more of the bearings in the transmission which would include the needle bearings between the input and main shafts. When you are in neutral with the clutch engaged (pedal released) the input shaft and counter shaft are being driven by the engine. The gears on the main shaft are not locked to it and are spinning freely. A bearing failing could cause enough friction to transfer some torque to the output shaft. When you step on the clutch the input shaft stops spinning with the engine which also stops the counter shaft and all of the gears n the main shaft which is why the noise would go away.
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