1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

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Provoke
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1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby Provoke » Tue Oct 16, 2018 5:47 pm

I just bought this s13 this Sunday and in every gear but 4th there is this rubbing/ grinding noise while accelerating. The clutch isn't slipping and the car runs fine but the noise can get loud int 5th gear. The noise sound to be coming from the far left side on the engine bay. Any clue as to what it could be?


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PapaSmurf2k3
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby PapaSmurf2k3 » Thu Oct 18, 2018 2:59 pm

I can't imagine why it wouldn't be doing it in 4th.
Does it make the noise if you rev the engine while parked?

Provoke
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby Provoke » Thu Oct 18, 2018 5:24 pm

No i doesn't. I've read in other forums that it might be the tranny fluid so I'm gonna do a flush but I have a feeling it's not that. The sound is coming more from the motor.

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PapaSmurf2k3
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby PapaSmurf2k3 » Fri Oct 19, 2018 10:46 am

Is there any way you could take a video of the noise?

Provoke
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby Provoke » Fri Oct 19, 2018 4:09 pm

[youtube]https://youtu.be/KEiCN6dplpA[/youtube]

I start off in 2nd then 3rd and then 4th

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PapaSmurf2k3
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby PapaSmurf2k3 » Sun Oct 21, 2018 1:18 pm

yeah that's definitely strange. The only thing I can think of is maybe some kind of bad bearing inside the trans but you said its coming from the engine, so I'm not sure.

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centralcoaster33
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Re: 1993 nissan 240sx rubbing/grinding noise while accelarating in every gear but 4th

Postby centralcoaster33 » Wed Oct 24, 2018 12:36 pm

I suspect the transmission. Specifically the bearings for the counter gear set. The counter gear set is used in all gears except direct drive (fourth). When in direct drive (fourth), then the counter gear is more or less on slack (no strain) while all the other gears are spinning around the main shaft on their needle bearings.

My bearing failed in the center of the counter gear set, popped out, then the counter gear shaft broke in half. I drove all the way home in the only remaining gear, fourth, running stop signs, bogging and working the clutch.
Luckily it was very late at night. The cause was poor transmission lubrication of course, but at some point, it's too late for those bearings to just add more oil.

I suggest putting the car all the way up on jack stands and listening to the noise location from underneath the car and suspect you'll find it coming from the 'belly' of the transmission. If it's what I think, then you must replace the bearing or the transmission to fix the problem before it breaks all the way. You can also drain and check the plug for bearings or shrapnel.


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